JP5662006B2 - Diesel engine particulate removal filter regeneration device and method - Google Patents

Description

  The present invention relates to a regeneration device and method for a diesel engine particulate removal filter that performs regeneration processing of a diesel engine particulate removal filter that reduces particulates contained in exhaust gas of a diesel engine.

  Conventionally, in a vehicle such as a construction machine using a diesel engine as a drive source, a filter device called a diesel engine particulate removal filter is provided in order to reduce particulates contained in exhaust gas of the diesel engine (for example, see Patent Document 1). reference).

  In a vehicle equipped with a diesel engine particulate removal filter, a regeneration process is generally performed in which particulates accumulated in the filter are burned. The regeneration process includes a natural regeneration process that automatically burns particulates when the engine load is high and the exhaust gas temperature rises, and a forced regeneration that forcibly burns particulates by supplying fuel to the diesel engine particulate removal filter There is processing. Among these, the forced regeneration process is divided into automatic forced regeneration that automatically starts the regeneration process on the apparatus side and manual forced regeneration that starts the regeneration process by an input from the outside. By appropriately performing such regeneration processing, it is possible to prevent excessive accumulation of particulates inside the filter, and to avoid problems such as failure of the diesel engine particulate removal filter.

JP 2007-270695 A

  However, in the above-described prior art, since the vehicle state such as the engine speed and the load is not taken into consideration when performing the regeneration process, it is not possible to perform an accurate regeneration process according to the vehicle state.

  The present invention has been made in view of the above, and provides a regenerating apparatus and method for a diesel engine particulate removal filter that can accurately perform regeneration processing of the diesel engine particulate removal filter according to the state of the vehicle. With the goal.

  In order to solve the above-described problems and achieve the object, a regeneration device for a diesel engine particulate removal filter according to the present invention includes a diesel engine as a drive source and diesel that reduces particulates contained in the exhaust gas of the diesel engine. A regenerator for a diesel engine particulate removal filter mounted on a vehicle having an engine particulate removal filter and controlling a regeneration process for burning the particulates collected by the diesel engine particulate removal filter, the diesel engine particulate removal Determining means for determining whether or not the regeneration process needs to be executed in accordance with the amount of the fine particles deposited on the filter; and determining whether or not the state of the vehicle is safe based on the operation information of the vehicle Vehicle state determination means for performing the vehicle state determination When the vehicle state is determined to be safe by the input means, it is necessary to forcibly execute the regeneration process and an input means capable of inputting a forced regeneration instruction signal for forcibly executing the regeneration process. Display means for displaying an image requesting input of the forced regeneration instruction signal, and reproduction control means for performing control for starting the regeneration processing in response to the forced regeneration instruction signal input by the input means. It is characterized by having.

  Further, in the above-described invention, the diesel engine particulate removal filter regeneration device according to the present invention is such that the vehicle state determination means continues to determine whether or not the vehicle state is safe during execution of the regeneration process. The regeneration control means performs control to stop the regeneration process when the vehicle state determination means determines that the state of the vehicle is not safe during execution of the regeneration process.

  The diesel engine particulate removal filter regeneration apparatus according to the present invention is characterized in that, in the above invention, the display means displays that the regeneration process is being executed.

  Further, the regeneration device for the diesel engine particulate removal filter according to the present invention is the above-described invention, wherein the regeneration control means is configured such that when particulates having a predetermined threshold value or more accumulate on the diesel engine particulate removal filter, the target rotation of the diesel engine The engine output derating process is performed to reduce the number and required torque.

  The diesel engine particulate removal filter regeneration apparatus according to the present invention is the above-described regeneration device for a diesel engine particulate removal filter according to the above invention, wherein the display means performs manual forced regeneration when a forced regeneration request signal for requesting manual forced regeneration processing is output by the regeneration control means. It is characterized by automatically switching to a playback start screen for displaying information for starting processing.

  Moreover, in the above-described invention, the display device of the diesel engine particulate removal filter according to the present invention returns to the old display screen that was displayed immediately before the start screen while displaying the regeneration start screen. When the instruction signal is input by the input means, the playback start screen is displayed again after the old display screen is displayed for a predetermined time.

  Further, in the above-described invention, the regeneration device for a diesel engine particulate removal filter according to the present invention is configured such that the predetermined time is any one of two times set according to whether the amount of particulate deposition is equal to or greater than the threshold value. On the other hand, the time set when the accumulation amount is equal to or greater than the threshold is shorter than the time set when the accumulation amount is less than the threshold.

  The method for regenerating a diesel engine particulate removal filter according to the present invention is mounted on a vehicle having a diesel engine as a driving source and a diesel engine particulate removal filter that reduces particulates contained in exhaust gas of the diesel engine, and the diesel A method for regenerating a diesel engine particulate removal filter performed by a regenerator that controls a regeneration process for burning the particulates collected by an engine particulate removal filter, wherein the particulate matter is deposited on the diesel engine particulate removal filter. It is determined whether or not it is necessary to execute the regeneration process, and if it is necessary to forcibly execute the regeneration process, it is determined whether or not the state of the vehicle is safe based on the operation information of the vehicle. Judgment and if the vehicle condition is safe, Enabling input of a forced regeneration instruction signal for forcibly executing the regeneration process, displaying an image requesting input of the forced regeneration instruction signal, and starting the regeneration process in response to the input of the forced regeneration instruction signal It is characterized by.

  Further, in the above-described invention, the method for regenerating a diesel engine particulate removal filter according to the present invention continuously determines whether or not the state of the vehicle is safe during the execution of the regeneration process. When it is determined that the state of the vehicle is not safe during execution, the regeneration process is stopped.

  According to the present invention, when the forced regeneration process is necessary based on the determination based on the amount of particulates accumulated in the diesel engine particulate removal filter and the vehicle is in a safe state, an input request for the forced regeneration instruction signal is displayed. In response to this display, when the forced regeneration instruction signal is input, the forced regeneration processing of the diesel engine particulate removal filter is started, so the user can determine whether the vehicle is in a safe state on the device side. The forced regeneration instruction signal cannot be input. Therefore, the regeneration process of the diesel engine particulate removal filter can be accurately performed according to the state of the vehicle.

FIG. 1 is a diagram schematically illustrating a functional configuration of a main part of a construction machine that is a vehicle equipped with a diesel engine particulate removal filter regeneration device according to an embodiment of the present invention. FIG. 2 is a flowchart showing an outline of the reproduction control process performed by the reproduction apparatus according to the embodiment of the present invention. FIG. 3 is a diagram showing the processing contents according to the level of the amount of particulates deposited on the diesel engine particulate removal filter. FIG. 4 is a flowchart showing an outline of processing of the engine control unit when the amount of accumulated particulates is at level 3. FIG. 5 is a diagram illustrating a display example of the signal input request image on the meter screen. FIG. 6 is a diagram illustrating a display example of the playback start screen. FIG. 7 is a diagram illustrating a display example of a reproduction start screen displayed by the display unit of the monitor device that has received the reproduction start signal. FIG. 8 is a diagram illustrating a display example of a meter screen displayed on the display unit of the monitor device in the reproduction processing state. FIG. 9 is a diagram illustrating a display example of a playback start screen displayed on the display unit of the monitor device in the playback stop state. FIG. 10 is a diagram illustrating a display example of a meter screen displayed on the display unit of the monitor device in a manual regeneration stop state. FIG. 11 is a diagram illustrating a display example of a playback start screen displayed on the display unit of the monitor device in a manual playback stop state. FIG. 12 is a diagram illustrating a display example of a playback start screen displayed on the display unit of the monitor device in a state where the playback process is completed. FIG. 13 is a flowchart showing an outline of processing of the engine control unit when the amount of accumulated particulates is at level 2. FIG. 14 is a diagram illustrating a display example of a meter screen displayed on the display unit of the monitor device in the automatic forced regeneration state. FIG. 15 is a diagram showing an outline of processing performed by the playback apparatus according to Embodiment 2 of the present invention. FIG. 16 is a diagram showing the case classification of possible processing according to the level of the amount of particulates deposited on the diesel engine particulate removal filter. FIG. 17 is a diagram showing an outline of the regeneration control process of the engine control unit when the amount of accumulated particulates in the diesel engine particulate removal filter is at a level at which manual regeneration is possible. FIG. 18 is a flowchart showing an outline of the derating process of the engine output. FIG. 19 is a torque diagram conceptually showing the engine output derate process. FIG. 20 is a diagram illustrating a display example in the monitor device that has received the forced regeneration request signal from the engine control unit. FIG. 21 is a diagram showing a display example of the forced regeneration request signal on the monitor device corresponding to a level where the amount of accumulated fine particles is relatively large. FIG. 22 is a diagram showing a display example of the playback start screen. FIG. 23 is a diagram showing a display example of a playback start screen displayed after FIG. FIG. 24 is a diagram showing a display example of a playback start screen displayed after FIG. FIG. 25 is a diagram illustrating a display example of an error message when the playback device is in the implementation-not-permitted state. FIG. 26 is a diagram illustrating a display example of a manual regeneration state displayed by the monitor device when the amount of accumulated particulates is at a relatively large level. FIG. 27 is a diagram illustrating a display example of a manual regeneration stop state displayed by the monitor device when the amount of accumulated particulates is at a relatively large level.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

(Embodiment 1)
FIG. 1 is a diagram schematically illustrating a functional configuration of a main part of a construction machine that is a vehicle on which a regeneration device for a diesel engine particulate removal filter according to Embodiment 1 of the present invention is mounted. A construction machine 1 shown in the figure includes a diesel engine 2 as a drive source, an exhaust passage 3 through which exhaust gas from the diesel engine 2 passes, and particulates such as soot that are provided in the exhaust passage 3 and are contained in the exhaust gas. Engine diesel particulate filter 4, diesel engine 2 and fuel injection injector 5 that injects diesel engine particulate filter 4, engine controller 6 that controls the operation of diesel engine 2, and engine controller 6 Controls the operation of the storage unit 7 that stores information referred to, the working machine 8 such as a bucket or an arm, and the construction machine 1 including the working machine 8, and the vehicle information of the construction machine 1 is always sent to the engine control unit 6. Operation to receive the input of various instruction signals to the vehicle control unit 9 to transmit and the engine control unit 6 and the vehicle control unit 9 Comprising a force unit 10, a monitor device 11 for displaying the operation information of the construction machine 1, a.

The diesel engine particulate removal filter 4 is provided in front of the filter 41 made of a material such as ceramic, and reduces nitrogen monoxide (NO) in the nitrogen oxide (NO _x ) in the exhaust gas to reduce the carbon dioxide. An oxidation catalyst 42 having a function of increasing nitrogen (NO ₂ ), temperature sensors 44, 45 and 46 for detecting temperatures on the inlet side of the oxidation catalyst 42, the inlet side of the filter 41 and the outlet side of the filter 41, and a filter And a differential pressure sensor 43 that detects a differential pressure between the inlet side pressure and the outlet side pressure.

  The engine control unit 6 includes a deposition amount calculation unit 61 that calculates a deposition amount of particulates deposited on the diesel engine particulate removal filter 4, and a level determination unit 62 that determines the level of the particulate deposition amount calculated by the deposition amount calculation unit 61. A vehicle state determination unit 63 that determines the vehicle state of the construction machine 1 based on the engine speed of the diesel engine 2 and vehicle information of the construction machine 1 sent from the vehicle control unit 9, and a level determination unit 62 A regeneration control unit 64 that controls the operation of the regeneration process based on the determination result and the determination result of the vehicle state determination unit 63. The accumulation amount calculation unit 61 is sent from the vehicle control unit 9 in addition to the differential pressure across the filter 41 detected by the differential pressure sensor 43 and the exhaust gas temperature (exhaust temperature) detected by the temperature sensors 44 to 46, respectively. By using the vehicle information, the amount of particulates deposited on the filter 41 is calculated. The level determination unit 62 has a function as a determination unit that determines whether or not to perform the regeneration treatment according to the amount of particulates accumulated in the diesel engine particulate removal filter 4.

  The storage unit 7 stores accumulation amount level information 71 which is referred to when the level determination unit 62 of the engine control unit 6 determines the level of particulate deposition amount.

  The monitor device 11 includes a display unit 111 that displays operation information and the like of the construction machine 1, an input unit 112 that receives an input of a signal or the like that indicates display contents of the display unit 111, and a control unit that performs operation control of the monitor device 11. 113. Note that a touch panel that forms part of the input unit 112 may be provided on the display unit 111.

  In the construction machine 1 having the above-described configuration, the engine control unit 6, the storage unit 7, and the monitor device 11 constitute a regeneration device 12 that controls regeneration processing for burning particulates accumulated on the diesel engine particulate removal filter 4. .

  FIG. 2 is a flowchart showing an outline of the playback control process performed by the playback device 12. In FIG. 2, first, the accumulation amount calculation unit 61 of the engine control unit 6 calculates the accumulation amount of particulates accumulated on the filter 41 of the diesel engine particulate removal filter 4 (step S <b> 1). Subsequently, the level determination unit 62 determines the level of the deposition amount of the fine particles calculated by the deposition amount calculation unit 61 (step S2). Thereafter, the playback device 12 performs processing based on the determination result of the level determination unit 62 under the control of the engine control unit 6 (step S3). Note that the playback device 12 repeatedly performs the processes of steps S1 to S3 at a predetermined timing.

  Hereinafter, the process of step S3 will be described in detail. FIG. 3 is a diagram showing the processing contents according to the level of the amount of particulates deposited on the diesel engine particulate removal filter 4. In the table Tb shown in the figure, the accumulation amount of fine particles is divided into four levels, and the larger the number indicating the level, the larger the accumulation amount of fine particles. First, level 1 corresponds to a state in which the amount of deposited fine particles is not deposited as much as necessary for the regeneration process. For this reason, when the determination result of the level determination unit 62 is level 1, the playback device 12 does not perform playback processing.

  Next, the case where the accumulation amount of particulates in the diesel engine particulate removal filter 4 is level 3 will be described. In this case, the playback device 12 prompts the operator (operator) to start playback processing. FIG. 4 is a flowchart showing an outline of the processing of the engine control unit 6 when the amount of accumulated particulates is at level 3. In FIG. 4, the engine control unit 6 transmits a forced regeneration request signal for requesting manual forced regeneration processing to the monitor device 11 (step S11). As shown in FIG. 5, the monitor device 11 that has received the forced regeneration request signal requests the input of a manual forced regeneration process start signal on the meter screen 201 on which the display unit 111 displays the operation information of the construction machine 1. The signal input request image 301 is displayed for a predetermined time. The signal input request image 301 is more preferably a color (for example, yellow) that is different from the main color of the meter screen 201 and can prompt the user to be alerted.

  An operator who has seen the signal input request image 301 displayed on the display unit 111 can switch to the playback start screen by selecting the menu button 302 displayed at the lower right of the meter screen 201. . FIG. 6 is a diagram illustrating a display example of the playback start screen. On the regeneration start screen 202 shown in the figure, a manual regeneration button 303 for inputting a forced regeneration instruction signal and a level image 304 indicating the level of the amount of accumulated particulates are displayed. In addition, the playback start screen 202 has an operating status display area 305 for displaying the operating status of the playback process, a message display area 306 for displaying a message corresponding to the operating status of the playback process, and a screen for returning to the meter screen 201. A screen return button 307 for inputting a signal is provided. Further, a scroll bar 308 is displayed on the left side of the manual playback button 303 on the playback start screen 202. When scrolling up the screen by moving the scroll bar 308, the scroll up button 308u provided on the left side of the screen return button 307 is selected, while when scrolling down the screen, the scroll up button 308u is selected. A scroll down button 308d provided on the left side is selected. By operating the scroll up button 308u or the scroll down button 308d in this way, it is possible to display a regeneration prohibiting button for inputting a signal prohibiting the start of the automatic forced regeneration processing, instead of the manual regeneration button 303. is there.

  Since the playback start screen 202 shown in FIG. 6 corresponds to a situation where the playback process has not started, nothing is displayed in the operation status display area 305. The message display area 306 displays a message that prompts the operator to input playback start, and a message that prompts the operator to stop the construction machine 1 in a safe place.

  Thereafter, the vehicle state determination unit 63 determines the vehicle state of the construction machine 1 based on the engine speed and load of the diesel engine 2, the exhaust temperature of the diesel engine particulate removal filter 4, and vehicle information sent from the vehicle control unit 9. Is determined (step S12). As a result of the determination by the vehicle state determination unit 63, if the vehicle state is safe (step S13, Yes), the engine control unit 6 transmits a regeneration permission signal to the monitor device 11 (step S14). The control unit 113 of the monitor device 11 performs control to disable the input of the forced regeneration instruction signal via the manual regeneration button 303 on the regeneration start screen 202 until the regeneration permission signal is received from the engine control unit 6. When a regeneration permission signal is received from the engine control unit 6, control is performed so that a forced regeneration instruction signal can be input via the manual regeneration button 303. In addition, when the vehicle state of the construction machine 1 is not safe (step S13, No), the engine control unit 6 returns to step S12 and performs the determination of the vehicle state determination unit 63.

  Here, the vehicle state being safe means that the diesel engine 2 is basically in a no-load, low-idle state, the vehicle is stopped and is not working, and more specific contents Is determined according to the type of construction machine 1. For example, when the construction machine 1 is a hydraulic excavator, the following two conditions are satisfied: (1) the lock lever of the work machine 8 is in the lock position, and (2) the fuel adjustment dial is in the low idle position. The vehicle state determination unit 63 determines that the vehicle state is safe.

  When the construction machine 1 is a bulldozer, (1) the travel lever is neutral, (2) the parking brake is applied, and (3) the lock lever of the work machine 8 is in the locked position. (4) When the four conditions that the fuel adjustment dial is at the low idle position are satisfied, the vehicle state determination unit 63 determines that the vehicle state is safe.

  When the construction machine 1 is a loader or a dump truck, (1) the shift lever is in the neutral position, (2) the parking brake is applied, and (3) the accelerator pedal is not depressed 3 When satisfying one condition, the vehicle state determination unit 63 determines that the vehicle state is safe.

  The engine control unit 6 that has transmitted the regeneration permission signal stands by until a forced regeneration instruction signal instructing the start of regeneration is received from the monitor device 11 (step S15, No). When the manual regeneration button 303 is selected and input on the monitor device 11, a forced regeneration instruction signal corresponding to this input is sent to the engine control unit 6. When the engine control unit 6 receives a forced regeneration instruction signal from the monitor device 11 (step S15, Yes), the regeneration control unit 64 performs control to start the regeneration process (step S16), and reproduces the start of the regeneration process. A start signal is transmitted to the monitor device 11 (step S17).

  FIG. 7 is a diagram illustrating a display example of the reproduction start screen 202 displayed on the display unit 111 of the monitor device 11 that has received the reproduction start signal. On the reproduction start screen 202, a reproduction stop button 309 is displayed, and a reproduction-in-progress image 310 having a different color and design from the signal input request image 301 is displayed in the operation status display area 305. On the playback start screen 202, a message indicating that manual playback is in progress is displayed in the message display area 306. Note that this message may be displayed blinking. In the state shown in FIG. 7, when the operator selects the playback stop button 309 via the input unit 112, a playback stop instruction signal for stopping the playback processing being executed is input.

  When the operator selects the screen return button 307 during the reproduction process, the display unit 111 transitions to the meter screen 201. On the meter screen 201 during the reproduction process, the image 310 being reproduced is displayed at the upper left position of the screen as shown in FIG. In the case illustrated in FIG. 8, the image 310 being reproduced is displayed in a color (for example, red) different from the signal input request image 301.

  After step S17, the vehicle state determination unit 63 of the engine control unit 6 determines the vehicle state of the construction machine 1 (step S18). If the vehicle state of the construction machine 1 is not safe as a result of the determination by the vehicle state determination unit 63 (No at Step S19), the regeneration control unit 64 performs control to stop the regeneration process (Step S20) and monitors the regeneration stop signal. It transmits to the apparatus 11 (step S21). The regeneration control unit 64 performs control to automatically end the forced regeneration process based on the determination result that the vehicle state is not safe by the vehicle state determination unit 63 (step S22, No). In this case, the engine control unit 6 ends a series of processes.

  FIG. 9 is a diagram showing a display example of the playback start screen 202 on the display unit 111 of the monitor device 11 that has received the playback stop signal by the process of step S21 of the engine control unit 6. In the reproduction start screen 202 shown in FIG. 6, a reproduction prohibition button 311 for inputting a signal prohibiting the start of forced reproduction processing is displayed, and a message notifying that reproduction has ended is displayed in the message display area 306. Is done. Note that the display of the meter screen 201 transitioned from the playback start screen 202 shown in FIG. 9 by the screen return button 307 is the same as in FIG.

  Next, the case where the vehicle state of the construction machine 1 is safe as a result of the determination by the vehicle state determination unit 63 (step S19, Yes) will be described. In this case, when the engine control unit 6 receives the reproduction stop instruction signal from the monitor device 11 (step S24, Yes), the reproduction control unit 64 performs control to stop the reproduction process (step S20), and monitors the reproduction stop signal. It transmits to the apparatus 11 (step S21). The playback stop instruction signal received by the engine control unit 6 in step S24 is in response to the operator selecting and inputting the playback stop button 309 displayed on the playback start screen 202 shown in FIG. Is transmitted from the monitor device 11.

  10 and 11 are diagrams showing display examples on the display unit 111 of the monitor device 11 after the reproduction process is manually stopped. On the meter screen 201 shown in FIG. 10, an image 312 during playback stop is displayed on the upper left. On the other hand, on the playback start screen 202 shown in FIG. 11, a playback stop image 312 is displayed in the operation status display area 305, and a playback stop cancel button 313 is displayed. In the message display area 306 of the playback start screen 202, a message indicating that playback is stopped is displayed.

  As described above, when the engine control unit 6 stops the regeneration process by manual input via the monitor device 11 (step S22, Yes) and then receives the regeneration stop cancel instruction signal from the monitor device 11 (step S23, Yes). Then, the reproduction control unit 64 performs control for starting the reproduction process again (step S16). On the other hand, when the engine control unit 6 stops the regeneration process by manual input via the monitor device 11 and does not receive a regeneration stop cancellation instruction signal from the monitor device 11 (No in step S23), the engine control unit 6 A series of processing ends.

  Next, when the vehicle state determination unit 63 determines that the vehicle state of the construction machine 1 is safe (step S19, Yes) and the engine control unit 6 does not receive a regeneration stop instruction signal from the monitor device 11 (step S19). S24, No) will be described. In this case, the engine control unit 6 returns to step S18 when the regeneration process does not end (step S25, No). On the other hand, when the regeneration process is completed (Yes at Step S25), the engine control unit 6 transmits a regeneration end signal to the monitor device 11 (Step S26), and ends the series of processes.

  The monitor device 11 that has received the reproduction end signal from the engine control unit 6 erases the image 310 being reproduced displayed on the display unit 111. At this time, the playback prohibition button 311 is displayed on the playback start screen 202 as shown in FIG. 12, and a message notifying the end of playback is displayed in the message display area 306.

  As described above, the manual forced regeneration process performed by the regeneration device 12 when the amount of particulate accumulation in the diesel engine particulate removal filter 4 is level 3 is completed.

  Next, the case where the accumulation amount of particulates in the diesel engine particulate removal filter 4 is level 2 will be described. FIG. 13 is a flowchart showing an overview of the processing of the engine control unit 6 when the amount of accumulated fine particles is level 2. In FIG. 13, the regeneration control unit 64 determines whether or not the construction machine 1 is in a state where automatic forced regeneration is possible based on the engine speed and load of the diesel engine 2 and the exhaust temperature of the diesel engine particulate removal filter 4. Is determined (step S31).

  In step S31, when it is determined by the regeneration control unit 64 that the construction machine 1 is in a state where automatic forced regeneration is possible (step S31, Yes), the regeneration control unit 64 performs control to start the regeneration process (step S32). Then, a reproduction start signal is transmitted to the monitor device 11 (step S33). Receiving the reproduction start signal, the monitor device 11 displays the image 310 being reproduced on the meter screen 201 as shown in FIG. In this case, the signal input request image 301 is not displayed on the meter screen 201. In order to distinguish playback by automatic forced playback from playback by manual forced playback, the color and design of the image being played during automatic forced playback may be different from the color and design of the image being played during manual forced playback. Good.

  On the other hand, when it is determined by the regeneration control unit 64 that the construction machine 1 is not in a state where automatic forced regeneration is possible (step S31, No), the engine control unit 6 monitors a forced regeneration request signal for requesting manual forced regeneration processing. It transmits to the apparatus 11 (step S34). The processing following step S34 is the same as the processing described in the case of level 3 (processing after step S12 in FIG. 4).

  Hereinafter, the process following step S33 will be described. Similarly to step S31, the regeneration control unit 64 determines whether or not the construction machine 1 is in a state where automatic forced regeneration is possible (step S35). When the regeneration control unit 64 determines that the construction machine 1 is not in a state where automatic forced regeneration is not possible (step S35, No), the regeneration control unit 64 performs control to stop the regeneration process (step S36), and then the above-described steps. Proceeding to S34, processing at the time of manual forced regeneration is performed. When the engine control unit 6 performs control for stopping the reproduction process in step S36 (step S36), the image 310 being reproduced is not displayed on the monitor device 11. Specifically, the meter screen 201 is a screen obtained by deleting the image 310 being reproduced from FIG. In this case, when the menu button 302 is selected, the display unit 111 switches to the reproduction start screen 202 shown in FIG.

  On the other hand, when the regeneration control unit 64 determines that the construction machine 1 is in a state where the automatic forced regeneration is possible (step S35, Yes), the engine control unit 6 receives a regeneration stop instruction signal from the monitor device 11 (step S35). (S37, Yes), the reproduction control unit 64 performs control to stop the reproduction process (step S38), and transmits a reproduction stop signal to the monitor device 11 (step S39). Thereafter, when the engine control unit 6 receives a regeneration stop cancellation instruction signal from the monitor device 11 (step S40, Yes), the engine control unit 6 returns to step S32. When the engine control unit 6 does not receive the regeneration stop cancellation instruction signal from the monitor device 11 at step S40 (step S40, No), the engine control unit 6 ends the series of processes.

  Next, when the regeneration control unit 64 determines that the construction machine 1 is in a state where automatic regeneration is possible (step S35, Yes), and the engine control unit 6 does not receive a regeneration stop instruction signal from the monitor device 11 (step S35). S37, No) will be described. In this case, the engine control unit 6 returns to step S35 if the regeneration process is not completed (No in step S41). On the other hand, when the reproduction process is completed (Yes in step S41), the engine control unit 6 transmits a reproduction end signal to the monitor device 11 (step S42), and the series of processes is completed.

  Finally, a case where the amount of particulates accumulated in the diesel engine particulate removal filter 4 is level 4 will be described. When the amount of accumulated particulates is level 4, the engine control unit 6 causes the display unit 111 of the monitor device 11 to display error information indicating that the amount of particulates accumulated in the diesel engine particulate removal filter 4 is large. A display signal is transmitted to the monitor device 11. The monitor device 11 that has received the error information display signal displays error information on the display unit 111. The error information displayed by the display unit 111 may be, for example, an image similar to the signal input request image 301 illustrated in FIG. 5 or a message that prompts replacement of the filter 41. Further, the monitor device 11 may be provided with a voice output function to output an error message by voice.

  According to the first embodiment of the present invention described above, when the forced regeneration process is necessary based on the determination based on the amount of particulates accumulated in the diesel engine particulate removal filter and the vehicle state is safe, the forced regeneration instruction signal When the forced regeneration instruction signal is input in response to this display, the forced regeneration process of the diesel engine particulate removal filter is started, so the device determines that the vehicle is in a safe state. Until then, the operator cannot input the forced regeneration instruction signal. Therefore, the regeneration process of the diesel engine particulate removal filter can be accurately performed according to the state of the vehicle.

  Further, according to the first embodiment, the regeneration image is displayed when the regeneration process of the diesel engine particulate removal filter is performed, so that the execution status of the regeneration process can be accurately notified. For this reason, the operator can immediately recognize that the regeneration process has started, and can confirm the situation around the construction machine during the regeneration process. Therefore, for example, in the case where there are many easily combustible substances around the construction machine and it is dangerous if high-temperature exhaust gas is discharged during regeneration, the operator should judge and stop the regeneration process. Therefore, the diesel particulate filter can be regenerated at an appropriate time.

(Embodiment 2)
The construction machine equipped with the diesel engine particulate removal filter regeneration device according to the second embodiment of the present invention is the same as that of the first embodiment described above. For this reason, in the following description, it demonstrates using the same code | symbol as Embodiment 1. FIG. In the second embodiment, automatic forced regeneration is referred to as automatic regeneration, and manual forced regeneration is referred to as manual regeneration.

  FIG. 15 is an explanatory diagram showing an outline of information (signals) transmitted and received among the engine control unit 6, the monitor device 11, and the vehicle control unit 9 in the second embodiment. The engine control unit 6 transmits a forced regeneration state, a manual regeneration permission state, a particulate accumulation amount, a manual regeneration request according to the level and a particulate deposition abnormality notification in the diesel engine particulate removal filter 4 to the monitor device 11. The forced regeneration state here refers to (1) a non-forced regeneration state in which all forced regenerations including automatic regeneration and manual regeneration are not performed, (2) automatic regeneration state, (3) manual regeneration state, and (4) forced regeneration state. One of the forced playback stop states in which playback is stopped. The manual regeneration permission state here is either (1) an execution permission state in which manual regeneration can be performed, or (2) an execution non-permission state in which manual regeneration cannot be performed.

  The monitor device 11 signals the engine control unit 6 to start manual regeneration (forced regeneration instruction signal), a signal to instruct automatic regeneration or stop of manual regeneration (regeneration stop instruction signal), and automatic regeneration or A signal (playback stop release signal) instructing release of manual playback stop is transmitted.

  The vehicle control unit 9 transmits a signal notifying the vehicle state to the engine control unit 6 and the monitor device 11. The vehicle state here is (1) a safe state in which a state necessary for manual regeneration is ensured, and (2) an unsafe state in which a state necessary for manual regeneration is not ensured. Either. The point that the definition of safety in the vehicle state is determined according to the model of the construction machine 1 is the same as in the first embodiment.

FIG. 16 is a diagram showing a case of processing that can be performed according to the level of the amount of particulates deposited on the diesel engine particulate removal filter 4. In FIG. 16, the accumulation amount of fine particles is divided into five levels I to V. The larger the number indicating the level, the larger the accumulation amount of fine particles. At level I, all forced regenerations are impossible. In level II, automatic regeneration and manual regeneration are possible, but the monitor device 11 does not display a manual regeneration request. At level III, automatic regeneration and manual regeneration are possible, and the monitor device 11 displays a manual regeneration request. At level IV, automatic regeneration is impossible, but manual regeneration is possible, and the monitor device 11 displays a manual regeneration request. At level V, all forced regenerations are impossible, and the monitor device 11 issues an error. The manual regeneration request displayed by the monitor device 11 at levels III and IV has different display contents depending on the level.

  Also in the second embodiment, the playback device 12 performs the playback control process shown in the flowchart of FIG. In the second embodiment, the processing at levels I and II is the same as the processing at levels 1 and 2 in the first embodiment.

  FIG. 17 is a diagram showing an outline of the regeneration control process of the engine control unit 6 when the amount of particulates accumulated in the diesel engine particulate removal filter 4 is level III or IV. In FIG. 17, the engine control unit 6 transmits a forced regeneration request signal for requesting manual regeneration processing to the monitor device 11 (step S101). The control unit 113 of the monitor device 11 performs control to disable the input of the forced regeneration instruction signal via the input unit 112 until the regeneration permission signal is received from the engine control unit 6, and receives the regeneration permission signal from the engine control unit 6. When received, control is performed to enable input of a forced regeneration instruction signal via the input unit 112.

  The processing after step S102 differs depending on the forced regeneration state of the diesel engine particulate removal filter 4. First, when the diesel engine particulate removal filter 4 is in the non-forced regeneration state, that is, not in the forced regeneration stopped state (No in Step S102), not in the automatic regeneration state (Step S103, No), and not in the manual regeneration state ( The case of step S104, No) will be described. In this case, when the regeneration stop instruction signal for instructing the stop of the forced regeneration is received from the monitor device 11 (step S105, Yes), the engine control unit 6 stops the forced regeneration of the diesel engine particulate removal filter 4 in the forced regeneration state. The status is changed, and the changed forced regeneration status is notified to the monitor device 11 (step S106). Thereafter, the engine control unit 6 changes the manual regeneration permission state of the diesel engine particulate removal filter 4 to the implementation disapproval state, and notifies the monitor device 11 of the changed manual regeneration permission state (step S107). Hereinafter, the forced regeneration state and the manual regeneration permission state of the diesel engine particulate removal filter 4 are simply referred to as “forced regeneration state” and “manual regeneration permission state”, respectively, and the forced regeneration state (or manual regeneration permission state) is changed. The notification to the monitor device 11 is simply referred to as “changing the forced regeneration state (or manual regeneration permission state)”.

  In step S105, when the instruction signal for forced regeneration stop is not received from the monitor device 11 (step S105, No), the engine control unit 6 proceeds to step S108 described later.

  After step S107, the vehicle state determination unit 63 determines whether or not the vehicle state of the construction machine 1 is safe. When the vehicle state determination unit 63 determines that the vehicle state is safe (step S108, Yes), the engine control unit 6 changes the manual regeneration permission state to the execution permission state (step S109). On the other hand, when the vehicle state determination unit 63 determines that the vehicle state is not safe (step S108, No), the engine control unit 6 changes the manual regeneration permission state to the execution disapproval state (step S110).

  After step S109 or step S110, if the engine control unit 6 receives a forced regeneration instruction signal from the monitor device 11 (step S111, Yes), and if the diesel engine particulate removal filter 4 is in the execution permitted state (step S112, Yes). The regeneration control unit 64 performs control for starting manual regeneration (step S113), and changes the forced regeneration state to the manual regeneration state (step S114).

  Subsequently, the engine control unit 6 sequentially transmits signals indicating the forced regeneration state and the manual regeneration permission state to the monitor device 11 (steps S115 and S116).

  When the instruction signal for starting manual regeneration is not received from the monitor device 11 at step S111 (step S111, No), and when the diesel engine particulate removal filter 4 is not in the execution-permitted state at step S112 (step S112, No), the engine control unit 6 proceeds to step S115.

  After step S116, when the manual regeneration request transmitted in step S101 is a request corresponding to level IV (step S117, Yes), the engine control unit 6 derates the engine output (step S118) and ends the series of processes. To do. On the other hand, when the manual regeneration request transmitted in step S101 is a request corresponding to level III (No in step S117), the engine control unit 6 ends the series of processes without passing through step S118.

  Here, the outline of the derating process of the engine output in step S118 will be described with reference to the flowchart shown in FIG. First, the engine control unit 6 acquires the accelerator opening in the operation input unit 10 (step S201), and acquires the engine speed of the diesel engine 2 (step S202). Thereafter, the engine control unit 6 obtains the injection command value output last time from the storage unit 7 (step S203).

  Subsequently, the engine control unit 6 sequentially calculates the target rotational speed and the necessary torque of the diesel engine 2 based on the values acquired in steps S201 to S203 (steps S204 and S205).

  When the accumulation amount of particulates in the diesel engine particulate removal filter 4 is level IV (step S206, Yes), the engine control unit 6 sequentially corrects the target rotational speed and the necessary torque (steps S207 and S208). FIG. 19 is a torque diagram conceptually showing the engine output derate process. A curve L shown in the figure shows a maximum torque line of the diesel engine 2 when the construction machine 1 is a hydraulic excavator or a crusher. In the second embodiment, when the accumulation amount of fine particles is at level IV, the target rotational speed and the necessary torque are derated at a predetermined ratio according to FIG. By performing such a derating process, even if the operator tries to continue the operation of the work machine 8, the output of the diesel engine 2 is derated, and the work must be interrupted to perform the regeneration process. Therefore, it is possible to avoid a situation in which the construction machine 1 is stopped to replace the diesel engine particulate removal filter 4.

  Thereafter, the engine control unit 6 calculates a fuel injection command value based on the target rotational speed and the required torque corrected in steps S207 and S208, respectively (step S209), and fuel injection corresponding to the calculated injection command value. A control signal is output to the fuel injector 5 (step S210), and the process returns to the main routine shown in FIG.

  Next, returning to FIG. 17, when the diesel engine particulate removal filter 4 is in the manual regeneration state, that is, not in the forced regeneration stop state (step S102, No), not in the automatic regeneration state (step S103, No), and The case of the manual regeneration state (step S104, Yes) will be described. In this case, when the engine control unit 6 receives a regeneration stop instruction signal from the monitor device 11 (step S119, Yes), the regeneration control unit 64 performs control to stop manual regeneration (step S120). Thereafter, the engine control unit 6 changes the forced regeneration state to the forced regeneration stop state (step S121), and changes the manual regeneration permission state to the implementation disapproval state (step S122). When the instruction signal for forced regeneration stop is not received from the monitor device 11 in step S119 (No in step S119), the engine control unit 6 proceeds to step S123 described later.

  After step S122, the vehicle state determination unit 63 determines whether or not the vehicle state of the construction machine 1 is safe. When the vehicle state determination unit 63 determines that the vehicle state is safe (step S123, Yes), the engine control unit 6 proceeds to step S127 described later. On the other hand, when the vehicle state determining unit 63 determines that the vehicle state is not safe (step S123, No), the regeneration control unit 64 performs control to stop manual regeneration (step S124). Stopping here means that manual regeneration cannot be executed. Thereafter, the engine control unit 6 changes the forced regeneration state to the non-forced regeneration state (step S125), and changes the manual regeneration permission state to the execution unpermitted state (step S126).

  After step S126, the engine control unit 6 determines whether or not the amount of particulate accumulation in the diesel engine particulate removal filter 4 has decreased to a specified value corresponding to a situation where manual regeneration can be terminated. When the accumulation amount of the particulates is less than the specified value (step S127, Yes), the regeneration control unit 64 performs control to end the manual regeneration (step S128). Thereafter, the engine control unit 6 changes the forced regeneration state to the non-forced regeneration state (step S129), changes the manual regeneration permission state to the execution disapproval state (step S130), and then proceeds to step S115. On the other hand, when the accumulation amount of the fine particles is not less than the specified value in step S127 (No in step S127), the engine control unit 6 proceeds to step S115.

  Next, the case where the diesel engine particulate removal filter 4 is in the automatic regeneration state, that is, not the forced regeneration stop state (No in Step S102) and the automatic regeneration state (Step S103, Yes) will be described. In this case, when the engine control unit 6 receives a regeneration stop instruction signal from the monitor device 11 (step S131, Yes), the regeneration control unit 64 performs control to stop automatic regeneration (step S132). Thereafter, the engine control unit 6 changes the forced regeneration state to the forced regeneration stop state (step S133), and changes the manual regeneration permission state to the execution disapproval state (step S134). If the instruction signal for forced regeneration stop is not received from the monitor device 11 in step S131 (No in step S131), the engine control unit 6 proceeds to step S135 described later.

  After step S134, the vehicle state determination unit 63 determines whether or not the vehicle state of the construction machine 1 is safe. When the vehicle state determination unit 63 determines that the vehicle state is safe (step S135, Yes), the engine control unit 6 changes the manual regeneration permission state to the execution permission state (step S136). On the other hand, when the vehicle state determination unit 63 determines that the vehicle state is not safe (No in step S135), the engine control unit 6 changes the manual regeneration permission state to the execution disapproval state (step S137).

  After step S136 or step S137, when the engine control unit 6 receives a forced regeneration instruction signal from the monitor device 11 (step S138, Yes), if the diesel engine particulate removal filter 4 is in an execution-permitted state (step S139, Yes). ), The regeneration control unit 64 performs control to start manual regeneration (step S140). Thereafter, the engine control unit 6 changes the forced regeneration state to the manual regeneration state (step S141). If the instruction signal for starting manual regeneration is not received from the monitor device 11 in step S138 (step S138, No), and if the diesel engine particulate removal filter 4 is not in the execution permitted state in step S139 (step S139, No), the engine control unit 6 proceeds to step S142.

  After step S141, the engine control unit 6 determines whether or not the particulate accumulation amount in the diesel engine particulate removal filter 4 has decreased to a specified value corresponding to a situation where automatic regeneration or manual regeneration can be terminated. If the accumulation amount of the fine particles is less than the specified value (step S142, Yes), the regeneration control unit 64 performs control to end automatic regeneration or manual regeneration (step S143). Note that the specified value in step S142 may be different for automatic regeneration and manual regeneration. Subsequently, the engine control unit 6 changes the forced regeneration state to the non-forced regeneration state (step S144), changes the manual regeneration permission state to the execution disapproval state (step S145), and then proceeds to step S115. If the accumulated amount of particulates in the diesel engine particulate removal filter 4 is greater than or equal to the specified value in step S142 (step S142, No), the engine control unit 6 proceeds to step S115.

  Next, the case where the diesel engine particulate removal filter 4 is in the forced regeneration stop state (step S102, Yes) will be described. In this case, when the engine control unit 6 receives a regeneration stop cancellation instruction signal for canceling the forced regeneration stop from the monitor device 11 (step S146, Yes), the engine control unit 6 changes the forced regeneration state to the non-forced regeneration state. (Step S147). On the other hand, when the engine control unit 6 does not receive the forced regeneration stop cancellation instruction signal from the monitor device 11 (step S146, No), the engine control unit 6 proceeds to step S148 described later.

  In step S148, the vehicle state determination unit 63 determines whether or not the vehicle state of the construction machine 1 is safe. When the vehicle state determination unit 63 determines that the vehicle state is safe (step S148, Yes), the engine control unit 6 changes the manual regeneration permission state to the execution permission state (step S149). On the other hand, when the vehicle state determination unit 63 determines that the vehicle state is not safe (No at Step S148), the engine control unit 6 changes the manual regeneration permission state to the implementation non-permission state (Step S150). After step S149 or S150, the engine control unit 6 proceeds to step S115.

  Next, the case where the diesel engine particulate removal filter 4 is at level V will be described. In this case, the engine control unit 6 transmits an error information display signal for causing the display unit 111 to display error information indicating that the amount of accumulated particulates in the diesel engine particulate removal filter 4 is large, and to the diesel engine. The same engine output derate processing as when the engine particulate removal filter 4 is at level IV is performed (see FIG. 18). The monitor device 11 that has received the error information display signal displays error information on the display unit 111. As error information displayed by the display unit 111, for example, an action code display image having an action code (“L04”) different from that in FIG. 20 may be displayed in addition to the signal input request image 301 shown in FIG.

  Hereinafter, the display contents of the monitor device 11 will be described taking a case where the construction machine 1 is a hydraulic excavator as an example. FIG. 20 is a diagram illustrating a display example on the display unit 111 of the monitor device 11 that has received the forced regeneration request signal from the engine control unit 6, and illustrates a display example when the forced regeneration request signal corresponds to level III. ing. On the meter screen 201 shown in FIG. 20, an action code display image 401 displaying the action code “L01” is displayed together with the signal input request image 301. The signal input request image 301 and the action code display image 401 are displayed in the same color.

  FIG. 21 is a diagram illustrating a display example on the display unit 111 when the forced regeneration request signal corresponds to level IV. A signal input request image 314 and an action code display image 402 are displayed on the meter screen 201 shown in FIG. The signal input request image 314 has the same contents as the signal input request image 301 but a different color. Further, the action code “L03” displayed in the action code display image 402 is different from that in the level III. The signal input request image 314 and the action code display image 402 have the same color.

  In Level III and Level IV, Level IV has a higher level of urgency for the forced regeneration process because the amount of particulates deposited on diesel engine particulate removal filter 4 is larger. In view of this, if the signal input request image 301 and the action code display image 402 are displayed in red while the signal input request image 301 and the action code display image 401 are displayed in yellow, the operator can display the meter screen. The urgency level of forced regeneration processing can be visually recognized above. In the case of level III, the forced regeneration process is not performed immediately, and normal work can be continued. Therefore, the action code display image 401 occupying a relatively large area in the meter screen 201 is displayed for about several seconds. It is more preferable if the operator can view various meters without paying attention to the action code display image 401.

  When the lever neutral state in which the lever (not shown) of the operation input unit 10 is neutral in the state shown in FIG. 20 or FIG. 21 continues for a predetermined time (for example, several seconds), the display unit 111 automatically switches to the playback start screen ( Similarly to the first embodiment described above, it is also possible to switch to the playback start screen by pressing the menu button 302).

  FIG. 22 is a diagram showing a display example of the playback start screen. In the reproduction start screen 202 shown in the figure, a manual reproduction button 303, a level image 304, an operation status display area 305, a message display area 306, a screen return button 307, a scroll bar 308, a scroll up button 308u, a scroll down button 308d, The execution button 315 is displayed at least. In the second embodiment, the display method of the message display area 306 is different from the first embodiment described above. Hereinafter, a display method of the message display area 306 will be specifically described.

  In the message display area 306, first, as shown in FIG. 22, the message “Diesel engine particulate removal filter may break down if the operation is continued as it is. Please perform manual regeneration immediately.” Is displayed. After a predetermined time has elapsed since the state shown in FIG. 22, the message display area 306 shows, as shown in FIG. 23, that “the fuel adjustment dial is low-idled at the locked position of the lock lever, as shown in FIG. Change to the message "Please set the position to". After that, when a predetermined time has passed since the state shown in FIG. 23, the message display area 306 displays a message “Please check the surrounding safety. Do you want to start playback?” As shown in FIG. At the same time, a selection button of “No” and “Yes” (“No” is a screen return button 307 and “Yes” is an execution button 315) is displayed. When a predetermined time elapses after the state shown in FIG. 24, the message display area 306 returns to the state shown in FIG. 22, and thereafter, until the selection input of “No” or “Yes” is made, FIGS. The three types of messages indicated by are repeatedly displayed at a predetermined cycle. Note that the period for changing the display content of the message display area 306 may be about several seconds.

  By performing the display shown in FIGS. 22 to 24, the operator can easily grasp the contents to be performed when the manual regeneration process is started. Further, the operation that the operator has to perform before starting the manual regeneration process is not detailed in the manual regeneration process because the execution button 315 is selected only once except for the stop of the vehicle and the surrounding safety check. Even an operator can start the manual regeneration process with a simple operation.

  It should be noted that when the automatic regeneration is being performed at levels II and III and the exhaust temperature of the diesel engine particulate removal filter 4 needs to be switched to the manual regeneration state, for example, the display of FIGS. May be displayed repeatedly.

  By the way, when the user selects and inputs the screen return button 307 on the playback start screen 202 shown in FIGS. 22 to 24, the monitor device 11 returns to the meter screen 201 which is the old display screen. The mode of the screen transition in the display unit 111 after returning to the meter screen 201 differs according to the level of the amount of deposited fine particles. First, when the level of the amount of deposited fine particles is level III, if the monitor device 11 has changed in the level III state even after returning to the meter screen 201, several hours have passed since returning to the meter screen 201. Later, the lever neutral state in which the lever (not shown) of the operation input unit 10 of the construction machine 1 is neutral continues for a predetermined time set in advance, and then automatically switches to the reproduction start screen 202 again. On the other hand, when the level of the amount of accumulated particulates is level IV, the monitor device 11 returns to the meter screen 201 and then the lever neutral state continues again for a predetermined time, and then the reproduction start screen. It automatically switches to 202 again. Thus, from returning to the meter screen 201 according to the magnitude relationship between the actual deposition amount and the threshold value when the accumulation amount at the boundary between the level III and the level IV is used as a threshold, until switching to the reproduction start screen 202 again. By changing the time setting in this case, in particular, in the case of level IV, a situation is formed in which manual regeneration must be started without returning to normal work. As a result, the regeneration process can be performed accurately according to the level of the amount of deposited fine particles.

  Next, screen transitions after the user selects “Yes” in the state shown in FIG. 24 will be described. In this case, when the diesel engine particulate removal filter 4 is in the execution-permitted state, manual regeneration is started. Thereafter, the display unit 111 displays a playback start screen 202 similar to that shown in FIG. On the other hand, even if the user selects “Yes” in the state shown in FIG. 24, when the diesel engine particulate removal filter 4 is in the implementation non-permitted state, the display unit 111 displays “Operation” as shown in FIG. Error message “Please retry” is displayed, and after a predetermined time (for example, several seconds) has elapsed, the screen automatically returns to the playback start screen 202. Note that even when the screen return button 307 is selected in the state shown in FIG.

  FIG. 26 is a diagram illustrating a display example (in the case of level IV) of the display unit 111 of the monitor device 11 when the diesel engine particulate removal filter 4 is in the manual regeneration state. In the meter screen 201 shown in the figure, an image 310 being reproduced is displayed in addition to the signal input request image 314 and the action code display image 402. In the state shown in FIG. 26, when the state where the lever of the operation input unit 10 is in the neutral state continues for a predetermined time (for example, several seconds), the display unit 111 automatically switches to the reproduction start screen. The reproduction start screen switched at this time is the same as the reproduction start screen 202 shown in FIG.

  Also in the case of level III, a replaying image having a different design and the same color as the replaying image 310 is displayed on the meter screen 201 shown in FIG. In the case of level III, the image being reproduced in the automatic reproduction state may be displayed in the same manner as the image being reproduced in the manual reproduction state.

  When the screen return button 307 is selected on the regeneration start screen when the diesel engine particulate removal filter 4 is in the manual regeneration state, the time from returning to the meter screen until returning to the regeneration start screen is the regeneration shown in FIG. The setting is the same as when the screen return button 307 is selected on the start screen 202.

  FIG. 27 is a diagram illustrating a display example (in the case of level IV) of the display unit 111 of the monitor device 11 in the forced regeneration stop state. On the meter screen 201 shown in the figure, a reproduction stop image 312 is displayed in addition to the signal input request image 314 and the action code display image 402. In the case of level III, a playback stopped image with a different design and the same color as in FIG. 27 is displayed on the meter screen 201 shown in FIG. In the state shown in FIG. 27, when the lever of the operation input unit 10 is in the neutral state for a predetermined time, a screen similar to the playback start screen 202 shown in FIG. Is displayed).

  When the amount of particulate accumulation in the diesel engine particulate removal filter 4 increases during the forced regeneration stop state and reaches the amount necessary to cancel the regeneration stop, the message display area 306 indicates “Regeneration is stopped. ”Is displayed, the message“ The amount of accumulated particulates is excessive. Please cancel the regeneration stop and perform manual regeneration. ”Is displayed for a predetermined time, and then“ Cancel the regeneration function stop. "No" and "Yes" buttons are displayed for a predetermined time, and thereafter, the above three types of messages are periodically displayed until "Yes" or "No" is selected and input. .

  According to the second embodiment of the present invention described above, the regeneration process of the diesel engine particulate removal filter can be accurately performed according to the state of the vehicle, as in the first embodiment.

  Further, according to the second embodiment, in a situation where the accumulation amount of fine particles is large and it is highly necessary to perform manual regeneration, the engine output is derated and the monitor display is automatically displayed on the regeneration start screen. Therefore, even if the operator tries to continue the normal work, the work cannot be continued, and the manual regeneration process can be surely executed at a necessary timing.

  Further, according to the second embodiment, since manual playback start guidance is performed while switching messages on the playback start screen, even an operator unfamiliar with manual playback can easily start manual playback with few operations. be able to.

  In the second embodiment, when the monitor device 11 is provided with a voice output function, a buzzer sound is output at a high level of urgency such as level IV or level V in addition to a voice error message. You may do it. In this case, it is desirable that the buzzer sound is set so that the level IV and the level V can be distinguished. For example, the buzzer sound is continuously emitted at the level V, while the buzzer sound is intermittently emitted at the level IV. That's fine.

  The embodiments for carrying out the present invention have been described in detail so far, but the present invention should not be limited only by the two embodiments described above. For example, an image that is being played back or a signal input request image is a part of a graphical user interface (GUI) and can be input with a signal through each image, and an operator selects these icons. In such a case, the screen may be changed.

  Further, the level of the accumulation amount determined by the level determination means may be further divided into more stages, or the processing content of each level may be set in advance by the operator.

  Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

DESCRIPTION OF SYMBOLS 1 Construction machine 2 Diesel engine 3 Exhaust passage 4 Diesel engine particulate removal filter 5 Fuel injection injector 6 Engine control part 7 Memory | storage part 8 Work machine 9 Vehicle control part 10 Operation input part 11 Monitor apparatus 12 Reproduction apparatus 41 Filter 42 Oxidation catalyst 43 Difference Pressure sensor 44, 45, 46 Temperature sensor 61 Accumulation amount calculation unit 62 Level determination unit 63 Vehicle state determination unit 64 Reproduction control unit 71 Level information 111 Display unit 112 Input unit 113 Control unit 201 Meter screen 202 Reproduction start screen 301, 314 Signal input request image 302 Menu button 303 Manual playback button 304 Level image 305 Operation status display area 306 Message display area 307 Image return button 308 Scroll bar 308d Scroll down button 308u Scroll Lumpur up button 309 playback stop button 310 reproduced in the image 311 reproduction prohibit button 312 reproduction stop in the image 313 playback stop release button 315 execution button 401 action code display image Tb table

Claims (11)

It is mounted on a construction machine having a diesel engine as a driving source and a diesel engine particulate removal filter that reduces particulates contained in the exhaust gas of the diesel engine, and burns the particulates collected by the diesel engine particulate removal filter A diesel engine particulate removal filter regeneration device for controlling the regeneration process
Determining means for determining whether or not it is necessary to execute the regeneration process including a manual forced regeneration process according to the amount of accumulated particulates in the diesel engine particulate removal filter;
The can be a no-load condition the diesel engine, the fuel adjustment dial which is provided on the construction machine and whether the operation information of the construction machine is in the position of the low idling, at least, the operation information of the operation information Vehicle state determination means for determining whether the state of the construction machine is safe based on;
The determination means determines that it is necessary to execute the manual forced regeneration process, and the vehicle condition determination means indicates that the fuel adjustment dial is in a low idling position and the construction machine is in a safe state. An input means capable of inputting a forced regeneration instruction signal for executing the manual forced regeneration processing , if determined;
If the determination means determines that the need to execute the manual forced regeneration process, and a display means for displaying an image to prompt the forced regeneration command signal,
Regeneration control means for performing control to start the manual forced regeneration processing in response to the forced regeneration instruction signal input by the input means;
A diesel engine particulate removal filter regeneration apparatus comprising: It is mounted on a construction machine having a diesel engine as a driving source and a diesel engine particulate removal filter that reduces particulates contained in the exhaust gas of the diesel engine, and burns the particulates collected by the diesel engine particulate removal filter A diesel engine particulate removal filter regeneration device for controlling the regeneration process
Determining means for determining whether or not it is necessary to execute the regeneration process including a manual forced regeneration process according to the amount of accumulated particulates in the diesel engine particulate removal filter;
Whether the lock lever that locks the operation of the work machine provided in the construction machine is in the lock position is the operation information of the construction machine, and at least the state of the construction machine is based on the operation information of the operation information Vehicle state determination means for determining whether it is safe,
The determination means determines that the manual forced regeneration process needs to be executed, and the vehicle state determination means determines that the lock lever is in the locked position and the state of the construction machine is safe. An input means capable of inputting a forced regeneration instruction signal for executing the manual forced regeneration processing ;
If the determination means determines that the need to execute the manual forced regeneration process, and a display means for displaying an image to prompt the forced regeneration command signal,
Regeneration control means for performing control to start the manual forced regeneration processing in response to the forced regeneration instruction signal input by the input means;
A diesel engine particulate removal filter regeneration apparatus comprising: The vehicle state determination means continuously determines whether or not the state of the construction machine is safe during the execution of the manual forced regeneration process,
Said reproduction control means, when said manual forced regeneration process the vehicle state determining means during execution of is determined not to be the safe state of the construction machine, and performs control for stopping the manual forced regeneration process A regeneration device for a diesel engine particulate removal filter according to claim 1 or 2. The display means includes
The regeneration device for a diesel engine particulate removal filter according to any one of claims 1 to 3, wherein the manual forced regeneration process is displayed. The reproduction control means includes
5. The engine output derate process is performed to reduce a target rotational speed and a necessary torque of the diesel engine when fine particles of a predetermined threshold value or more are accumulated on the diesel engine fine particle removal filter. A regeneration device for a diesel engine particulate removal filter according to one item. The display means includes
If forced regeneration request signal for requesting the manual forced regeneration processing by the regeneration control means is output, and characterized in that automatically switch to playback start screen to display the information for initiating the manual forced regeneration process The regeneration device for a diesel engine particulate removal filter according to any one of claims 1 to 5 . The display means includes
When an instruction signal for returning to the old display screen displayed immediately before the playback start screen is input by the input means while the playback start screen is displayed, the playback is performed after the old display screen is displayed for a predetermined time. The regenerating apparatus for a diesel engine particulate removal filter according to claim 6, wherein the start screen is displayed again. The predetermined time is one of two times set according to whether or not the amount of deposited fine particles is equal to or greater than the threshold value,
The diesel engine particulate removal filter according to claim 7, wherein a time set when the accumulation amount is equal to or greater than the threshold is shorter than a time set when the accumulation amount is less than the threshold. Playback device. It is mounted on a construction machine having a diesel engine as a driving source and a diesel engine particulate removal filter that reduces particulates contained in the exhaust gas of the diesel engine, and burns the particulates collected by the diesel engine particulate removal filter A regeneration method of a diesel engine particulate removal filter performed by a regeneration device that controls a regeneration process to be performed,
It is determined whether or not it is necessary to execute the regeneration process including a manual forced regeneration process according to the accumulation amount of the particulates in the diesel engine particulate removal filter,
Whether or not a fuel adjustment dial provided in the construction machine, which can put the diesel engine in a no-load state, is at a low idling position is set as operation information of the construction machine, and at least in the operation information of the operation information Based on whether the condition of the construction machine is safe,
If the determination determines that the manual forced regeneration process needs to be performed, and the fuel adjustment dial is at a low idle position and the construction machine is in a safe state, the manual forced regeneration process is performed. Enabling the forced regeneration instruction signal to be input,
When the determination determines that the manual forced regeneration process needs to be executed, an image requesting input of the forced regeneration instruction signal is displayed;
The method for regenerating a diesel engine particulate removal filter, wherein the manual forced regeneration process is started in response to an input of the forced regeneration instruction signal. It is mounted on a construction machine having a diesel engine as a driving source and a diesel engine particulate removal filter that reduces particulates contained in the exhaust gas of the diesel engine, and burns the particulates collected by the diesel engine particulate removal filter A regeneration method of a diesel engine particulate removal filter performed by a regeneration device that controls a regeneration process to be performed,
It is determined whether or not it is necessary to execute the regeneration process including a manual forced regeneration process according to the accumulation amount of the particulates in the diesel engine particulate removal filter,
Whether locking lever for locking the operation of the working machine having the construction machine is in the locked position and the operation information of the construction machine, at least, the state of the construction machine based on the operation information of the operation information Determine if it ’s safe,
When the determination determines that the manual forced regeneration process needs to be executed, and the lock lever is in a locked position and the state of the construction machine is safe, the forced forced regeneration process is executed. Enables input of playback instruction signal,
When the determination determines that the manual forced regeneration process needs to be executed, an image requesting input of the forced regeneration instruction signal is displayed;
The method for regenerating a diesel engine particulate removal filter, wherein the manual forced regeneration process is started in response to an input of the forced regeneration instruction signal. Continue to determine whether the state of the construction machine is safe during the manual forced regeneration process,
11. The regeneration of a diesel engine particulate removal filter according to claim 9, wherein, when it is determined that the state of the construction machine is not safe during the execution of the manual forced regeneration process, the manual forced regeneration process is stopped. Method.

Images