Nothing Special   »   [go: up one dir, main page]

WO2013061431A1 - Dispositif de refroidissement pour moteur à combustion interne - Google Patents

Dispositif de refroidissement pour moteur à combustion interne Download PDF

Info

Publication number
WO2013061431A1
WO2013061431A1 PCT/JP2011/074717 JP2011074717W WO2013061431A1 WO 2013061431 A1 WO2013061431 A1 WO 2013061431A1 JP 2011074717 W JP2011074717 W JP 2011074717W WO 2013061431 A1 WO2013061431 A1 WO 2013061431A1
Authority
WO
WIPO (PCT)
Prior art keywords
internal combustion
combustion engine
cooling
water
cooling water
Prior art date
Application number
PCT/JP2011/074717
Other languages
English (en)
Japanese (ja)
Inventor
祥一 桑山
吉原　正朝
Original Assignee
トヨタ自動車 株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by トヨタ自動車 株式会社 filed Critical トヨタ自動車 株式会社
Priority to PCT/JP2011/074717 priority Critical patent/WO2013061431A1/fr
Publication of WO2013061431A1 publication Critical patent/WO2013061431A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/16—Outlet manifold

Definitions

  • the present invention relates to a cooling apparatus for an internal combustion engine that circulates cooling water in a water-cooled cooling system through operation of a water pump to cool the internal combustion engine.
  • a water-cooled cooling system for cooling an internal combustion engine mounted on a vehicle such as an automobile as a drive source.
  • a cooling system includes a water jacket formed inside the internal combustion engine, a radiator that is a heat exchanger, and a cooling water passage that communicates the water jacket and the radiator.
  • the cooling system is provided with a water pump, and the cooling water filled in the cooling system is forcibly circulated through the operation of the water pump.
  • the cooling water When the cooling water is forcedly circulated, the cooling water whose temperature has been lowered after passing through the radiator flows into the water jacket, and the temperature of the internal combustion engine is lowered through heat exchange with the cooling water. To be cooled.
  • the internal combustion engine can be automatically stopped when the vehicle stops running at an intersection, etc., and the vehicle can be started by automatically starting the internal combustion engine at any time during the automatic stop.
  • a vehicle having a function to be used, that is, a so-called engine automatic stop / start function has been proposed and put into practical use.
  • Patent Document 1 employs an electric type water pump and stops the operation of the water pump when the internal combustion engine is automatically stopped during cold operation when the temperature of the cooling water in the water jacket is low. It has been proposed to let According to this device, a decrease in electromotive force of a battery that supplies electric power to the pump by stopping the operation of the water pump can be suppressed.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a cooling device for an internal combustion engine that can suitably improve the fuel efficiency of the internal combustion engine.
  • a cooling device for an internal combustion engine having a water-cooled cooling system includes a water pump that pumps cooling water in the cooling system and that can change the pumping amount of the cooling water, an automatic stop start unit, and a limiting unit.
  • the automatic stop / start unit temporarily automatically stops the internal combustion engine under a predetermined stop condition, and restarts the internal combustion engine under a predetermined restart condition.
  • the limiting unit is configured to supply a cooling water pressure of the water pump during the automatic stop of the internal combustion engine and the water pump during operation after restarting the internal combustion engine, compared to when the temperature is high Limit the amount of cooling water pumped.
  • the cooling water pumping amount of the water pump by reducing the cooling water pumping amount of the water pump, the work amount of the water pump is reduced and the fuel consumption of the internal combustion engine is reduced, or the degree of cooling by the cooling system is reduced and the engine warming is reduced. Since the machine is completed at an early stage, the fuel efficiency of the internal combustion engine is improved.
  • the water pump is operated by the pump operating unit without limiting the cooling water pumping amount during engine operation immediately after the internal combustion engine is started by operating the operation start switch.
  • the water pump is operated by the pump operating unit without limiting the cooling water pumping amount for a predetermined period immediately after the start of the internal combustion engine.
  • a water pump having an input shaft connected to an output shaft of an internal combustion engine via a clutch mechanism and operating by forced rotation of the input shaft is employed.
  • the limiting unit limits the cooling water pumping amount of the water pump by disengaging the output shaft of the internal combustion engine and the input shaft of the water pump by disengaging the clutch mechanism.
  • the clutch mechanism is switched to a connected state every time the internal combustion engine is restarted in a situation where the clutch mechanism is in a non-connected state in order to limit the cooling water pumping amount of the water pump when the internal combustion engine is automatically stopped. Then, since the switching of the operating state of the clutch mechanism is frequently performed, this may reduce the durability of the clutch mechanism.
  • the number of times that the operating state of the clutch mechanism is switched can be extremely reduced, so that the durability of the clutch mechanism can be improved.
  • the cooling water pumping amount of the water pump is limited to “0” by the limiting unit.
  • the work amount of the water pump is set to “0” and the fuel consumption amount of the internal combustion engine is suitable. Therefore, the engine warm-up can be completed earlier by making the degree of cooling by the cooling system extremely small, and the fuel efficiency performance of the internal combustion engine can be improved more suitably.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a cooling device for an internal combustion engine according to an embodiment embodying the present invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows schematic structure of the vehicle to which the cooling device of this Embodiment is applied.
  • the flowchart which shows the execution procedure of an automatic stop process.
  • the flowchart which shows the execution procedure of a restart process.
  • the flowchart which shows notionally the execution procedure of a pump stop process.
  • the timing chart which shows an example of the execution aspect of a pump stop process.
  • the vehicle 1 is equipped with an internal combustion engine 10 as a drive source.
  • the internal combustion engine 10 is provided with a water cooling type cooling system 18 including a water jacket 11, a radiator 12, cooling water passages 13 and 14, a bypass water passage 15, a cooler water passage 16 and a valve water passage 17.
  • the water jacket 11 is formed in a shape extending inside the internal combustion engine 10.
  • the radiator 12 is a heat exchanger for cooling the cooling water passing through the radiator 12 through heat exchange with the outside air.
  • the cooling water passage 13 is a passage for guiding cooling water flowing out from the water jacket 11 to the radiator 12, and the cooling water passage 14 is a passage for returning the cooling water after passing through the radiator 12 to the water jacket 11.
  • the bypass water passage 15 is a passage that communicates the cooling water passages 13 and 14 so as to bypass the radiator 12.
  • the cooler water channel 16 and the valve water channel 17 will be described later.
  • the cooling system 18 is provided with a water pump 19.
  • a water pump 19 As the water pump 19, an engine drive type driven by the output shaft 10a of the internal combustion engine 10 is employed.
  • An electromagnetically driven clutch mechanism 20 is provided between the input shaft 19 a of the water pump 19 and the output shaft 10 a of the internal combustion engine 10. Then, by bringing the clutch mechanism 20 into a connected state, the output shaft 10a of the internal combustion engine 10 and the input shaft 19a of the water pump 19 are connected, and the water pump 19 is operated to fill the cooling system 18 with cooling. The water is pumped and the cooling water is forcedly circulated in the cooling system 18.
  • the connection between the output shaft 10 a of the internal combustion engine 10 and the input shaft 19 a of the water pump 19 is released, and the operation of the water pump 19 is stopped.
  • the circulation of the cooling water inside is also stopped.
  • the water pump 19 is operated through the operation control of the clutch mechanism 20 to switch between the state in which the cooling water is pumped and the state in which the cooling water is not pumped without being operated. .
  • the cooling system 18 is provided with a thermostat valve 21.
  • the thermostat valve 21 changes its opening according to the temperature of the cooling water that abuts.
  • the passage cross-sectional areas of the cooling water passage 14 and the bypass water passage 15 are changed by changing the opening degree of the thermostat valve 21, thereby adjusting the amount of cooling water flowing into the radiator 12.
  • the internal combustion engine 10 is provided with an EGR device 30 for returning a part of the exhaust gas in the exhaust passage to the intake passage for recirculation.
  • the EGR device 30 includes an EGR passage (not shown) that communicates an exhaust passage and an intake passage of the internal combustion engine 10, an EGR cooler 32 that cools exhaust gas (EGR gas) that passes through the EGR passage, and an EGR passage. And an EGR valve 33 for changing the cross-sectional area of the passage.
  • the cooling system 18 is provided with the cooler water passage 16 that passes through the inside of the EGR cooler 32 and the valve water passage 17 that passes through the inside of the EGR valve 33.
  • the cooler water channel 16 is branched from the cooling water passage 13 and extends in a shape returning to the cooling water passage 14 (specifically, downstream of the thermostat valve 21) after passing through the EGR cooler 32.
  • the valve water passage 17 is branched from the cooling water passage 13 and extends in a shape to return to the cooling water passage 14 (specifically, downstream of the thermostat valve 21) after passing through the inside of the EGR valve 33.
  • the power generated by the internal combustion engine 10 is output from the output shaft 10a of the internal combustion engine 10 to the output shaft 50 via the transmission 40 and the like, and finally transmitted to the wheels.
  • the power generated by the internal combustion engine 10 is also transmitted to the transmission belt 23 via a pulley 22 connected to the output shaft 10a. Then, the other pulleys 24 and 25 are rotated by the power transmitted by the transmission belt 23.
  • the pulley 24 is connected to the input shaft 19 a of the water pump 19 through the clutch mechanism 20.
  • the water pump 19 is driven and operated by the rotation of the pulley 24 when the clutch mechanism 20 is in the connected state, and stops operating without being driven by the pulley 24 when the clutch mechanism 20 is in the disconnected state.
  • the pulley 25 is connected to a motor generator (hereinafter referred to as “M / G”) 26.
  • M / G 26 is driven by the rotational torque transmitted to the pulley 25.
  • the M / G 26 functions as a generator.
  • the M / G 26 is electrically connected to the inverter 27.
  • the inverter 27 is switched so as to charge electric energy from the M / G 26 to the battery 28 by switching.
  • the M / G 26 functions as an electric motor when the internal combustion engine 10 is restarted. At this time, the M / G 26 forcibly rotates (cranks) the output shaft 10a of the internal combustion engine 10 to apply auxiliary torque for starting the internal combustion engine 10 to the output shaft 10a.
  • a starter motor 29 is attached to the internal combustion engine 10.
  • the starter motor 29 is driven.
  • auxiliary torque for starting the internal combustion engine 10 is applied by cranking by the starter motor 29.
  • the senor according to the present embodiment is provided with various sensors.
  • a speed sensor 62 for detecting the traveling speed (vehicle speed SPD) of the vehicle 1 or the temperature THW [en] of the cooling water inside the water jacket 11 is used.
  • a temperature sensor 63 for detecting and a temperature sensor 64 for detecting the temperature THW [egr] of the cooling water passing through the valve water channel 17 are provided.
  • a rotation sensor 65 for detecting the rotation speed of the output shaft 10a of the internal combustion engine 10 (engine rotation speed NE) and the operation start switch 61 operated when starting the internal combustion engine 10 are provided.
  • an accelerator operation amount sensor 66 for detecting the depression amount of an accelerator pedal (not shown), an idle switch 67 for detecting whether or not the accelerator pedal is depressed, and a brake for detecting whether or not a brake pedal (not shown) is depressed.
  • a switch 68 and the like are also provided.
  • the apparatus includes an electronic control unit 60 that includes, for example, a microcomputer.
  • the electronic control device 60 captures output signals of various sensors and executes various arithmetic processes based on the output signals. Based on the calculation results, the electronic control device 60 performs well-known engine control, clutch mechanism 20 operation control, Various controls relating to vehicle control such as control of the inverter 27 are executed.
  • the electronic control device 60 functions as an automatic stop / start unit, a limiting unit, and a pump operating unit.
  • the electronic control unit 60 executes an automatic stop process and a restart process of the internal combustion engine 10 as one of such various controls.
  • FIG. 3 is a flowchart showing the procedure of the automatic stop process
  • FIG. 4 is a flowchart showing the procedure of the restart process.
  • the series of processes shown in these flowcharts is executed by the electronic control unit 60 as an interrupt process for each predetermined period.
  • step S101 the operating states of the vehicle 1 and the internal combustion engine 10 are read through the detection signals of the various sensors.
  • step S102 it is determined from these operating states whether or not an automatic stop condition is satisfied. Specifically, for example, when all of the following [Condition 1] to [Condition 5] are satisfied, it is determined that the automatic stop condition is satisfied.
  • [Condition 1] The accelerator pedal is not depressed (the idle switch 67 is “ON”).
  • [Condition 2] The remaining capacity of the battery 28 is a predetermined amount or more.
  • [Condition 3] The brake pedal is depressed (the brake switch 68 is “ON”).
  • Condition 4 The vehicle 1 is stopped.
  • [Condition 5] After all of [Condition 1] to [Condition 4] are satisfied, there is no history that the internal combustion engine 10 has been automatically stopped.
  • step S102 NO
  • the automatic stop condition is not satisfied, and the internal combustion engine 10 is automatically stopped. Assuming that there is no condition, this processing is temporarily terminated.
  • step S102 stop processing is executed (S103). Specifically, the operation of the internal combustion engine 10 is stopped, for example, by stopping the fuel supply to the internal combustion engine 10. Thereafter, this process is temporarily terminated.
  • step S201 the operating states of the vehicle 1 and the internal combustion engine 10 are read through the detection signals of the various sensors.
  • step S202 it is determined whether or not the restart condition is satisfied from these operating states. Specifically, the restart condition is satisfied when one of the above [Condition 1] to [Condition 4] is not satisfied under the condition that the engine is stopped by the automatic stop processing described above. It is judged.
  • step S202 when any one of [Condition 1] to [Condition 4] is not satisfied in the automatic stop state of the internal combustion engine 10 (step S202: YES), the start process is started assuming that the restart condition is satisfied. (Step S203). More specifically, the M / G 26 is driven to execute the cranking, and well-known fuel injection control and ignition timing control are executed to restart the internal combustion engine 10. Thereafter, this process is temporarily terminated.
  • the electronic control unit 60 executes a process (pump stop process) for stopping the operation of the water pump 19 when the temperature of the cooling water is low as one of various controls.
  • the series of processes shown in the flowchart of FIG. 5 conceptually shows the execution procedure of the pump stop process, and the actual process is executed by the electronic control unit 60 as an interrupt process at predetermined intervals.
  • step S301 when the internal combustion engine 10 is started by the operation of the operation start switch 61 by an occupant, first, as shown in FIG. 5, the clutch mechanism 20 is brought into a connected state and the water pump 19 is operated (step S301). ). Thereafter, the operation of the water pump 19 is continued over a period until the estimated values of the cooling water temperature (estimated water temperatures VT [en], VT [egr]) are calculated (step S302: NO). .
  • the estimated water temperatures VT [en] and VT [egr] immediately after the internal combustion engine 10 is started are calculated based on the cooling water temperature THW [enn] when both [Condition 6] and [Condition 7] below are satisfied.
  • the temperature THW [en] is detected and stored as an estimated value of the cooling water.
  • the cooling water temperatures THW [en] and THW [egr] detected by the temperature sensors 63 and 64 after the internal combustion engine 10 is started are changed. When this condition is satisfied, it is determined that the water pump 19 is operating normally.
  • [Condition 7] The difference between the cooling water temperatures THW [en] and THW [egr] detected by the temperature sensors 63 and 64 is reduced. By satisfying this condition, unnecessary variations in the cooling water temperature in the cooling system 18 (specifically, in the water jacket 11 and the valve water passage 17) are suppressed, and the temperature sensors 63 and 64 perform this processing. It is determined that a useful temperature can be properly detected.
  • the clutch mechanism 20 is engaged for a predetermined period thereafter and the water pump 19 is operated. Calculation of VT [en] and VT [egr] is started.
  • the estimated water temperature VT [en] is set to a predetermined temperature TL (40 ° C. in the present embodiment). It is determined whether or not it is less than (step S303).
  • step S303: YES If the estimated water temperature VT [en] is lower than the predetermined temperature TL (step S303: YES), the operating state of the clutch mechanism 20 is switched to the non-connected state, and the operation of the water pump 19 is stopped (step). S304). At this time, since the temperature of the internal combustion engine 10 is low, it is desirable to raise the temperature early, and the operation of the water pump 19 is stopped to stop the cooling by the cooling system 18.
  • the clutch mechanism 20 is maintained in a disconnected state during a period in which the estimated water temperatures VT [en] and VT [egr] are both lower than a predetermined temperature TH (eg, 100 ° C.) (step S304: NO).
  • a predetermined temperature TH eg, 100 ° C.
  • the water pump 19 is maintained in the operation stopped state (step S304).
  • the pumping amount of the cooling water by the water pump 19 is set to “0” during the automatic stop of the internal combustion engine 10, and the water pump 19 also operates during the operation after the restart of the internal combustion engine 10.
  • the pumping amount of the cooling water is set to “0”.
  • the estimated water temperatures VT [en] and VT [egr] are calculated as follows.
  • the estimated water temperature VT [en] a value corresponding to the temperature of the cooling water at the highest temperature inside the water jacket 11 is calculated.
  • the endothermic amount at that time is calculated based on the engine speed NE and the fuel injection amount Q, and the heat release amount is calculated based on the coolant temperature THW [en] and the estimated water temperature VT [ en].
  • a temperature change amount ⁇ T1 is calculated based on the difference between the heat absorption amount and the heat dissipation amount (heat absorption amount ⁇ heat dissipation amount), and at this time, the estimated water temperature VT [en] stored in the electronic control unit 60 is set to the above temperature.
  • a new estimated water temperature VT [en] is calculated.
  • the relationship between the heat absorption amount, the engine rotational speed NE, and the fuel injection amount Q, the relationship between the heat dissipation amount, the cooling water temperature THW [en], and the estimated water temperature VT [en], as well as the heat absorption amount and the discharge amount As a relationship between the heat amount and the temperature change amount ⁇ T1, a relationship in which an appropriate value is calculated as the estimated water temperature VT [en] is obtained in advance based on the results of experiments and simulations. It is remembered.
  • a value corresponding to the temperature of the cooling water in the EGR cooler 32 is calculated as the estimated water temperature VT [egr].
  • the endothermic amount at that time is calculated based on the engine rotational speed NE, the fuel injection amount Q, and the estimated water temperature VT [egr].
  • a temperature change amount ⁇ T2 is calculated based on a difference from a predetermined constant value.
  • a new estimated water temperature VT [egr] is calculated by adding the temperature change amount ⁇ T2 to the estimated water temperature VT [egr] stored in the electronic control unit 60 at this time.
  • a relationship and a value that allow an appropriate value to be calculated as the estimated water temperature VT [egr] are obtained in advance based on the results of experiments and simulations, and are stored in the electronic control unit 60.
  • step S305: YES when the operation of the vehicle 1 is continued and one of the updated estimated water temperatures VT [en] and VT [egr] becomes equal to or higher than the predetermined temperature TH (step S305: YES), the clutch mechanism 20 After the operating state is switched to the connected state and the operation of the water pump 19 is resumed (step S306), this process is terminated. At this time, assuming that the temperature of the cooling water has risen to such an extent that there is a fear of boiling of the cooling water in the water jacket 11 or the cooler water channel 16, the operation of the water pump 19 is started to lower the temperature. .
  • step S302 YES
  • step S303 NO
  • the clutch mechanism 20 is maintained in the connected state, and the water pump 19 is continuously operated. At this time, the temperature of the internal combustion engine 10 is relatively high, and it is not necessary to positively increase the temperature, and the operation of the water pump 19 is continued.
  • FIG. 6 shows an example of the execution mode of the pump stop process.
  • the work amount of the water pump 19 is reduced and the fuel consumption of the internal combustion engine 10 is reduced. Since the degree of cooling by 18 is reduced and the warm-up of the internal combustion engine 10 is completed at an early stage, the fuel efficiency of the internal combustion engine 10 can be improved.
  • the cooling water pumping amount of the water pump 19 during the automatic stop of the internal combustion engine 10 is In addition to being set to “0”, the cooling water pumping amount of the water pump 19 during operation after restarting the internal combustion engine 10 is set to “0” (time t3 to t4 in FIG. 6).
  • the internal combustion engine 10 when the internal combustion engine 10 is automatically stopped or operated after restarting during cold operation where the temperature of the cooling water is low, that is, when cooling by the cooling system 18 is not necessary, the work load of the water pump 19 is increased.
  • the fuel consumption of the internal combustion engine 10 can be reduced by setting “0” to “0”.
  • the degree of cooling by the cooling system 18 can be made extremely small, and the warm-up of the internal combustion engine 10 can be completed early. Therefore, the fuel efficiency performance of the internal combustion engine 10 can be preferably improved.
  • the pumping amount of the cooling water by the water pump 19 is set to “0”, compared with an apparatus in which a small amount of cooling water is pumped and circulated in the cooling system 18.
  • the fuel consumption of the internal combustion engine 10 can be further reduced, and the degree of cooling by the cooling system 18 can be made extremely small, so that the warm-up of the internal combustion engine 10 can be completed earlier.
  • the water pump 19 is operated regardless of the temperature of the cooling water for a predetermined period (time t1 to t2 in FIG. 6) immediately after the start of the internal combustion engine 10 by the operation of the operation start switch 61.
  • the water pump 19 pumps cooling water. Therefore, unnecessary variations in the cooling water temperature inside the cooling system 18 are eliminated by circulating the cooling water inside the cooling system 18 (specifically, inside the water jacket 11 and inside the valve water channel 17) over a predetermined period.
  • the cooling water temperature can be detected by the temperature sensors 63 and 64. Therefore, it is possible to appropriately detect a temperature useful as the temperature of the cooling water in the cooling system 18 when the internal combustion engine 10 is started by operating the operation start switch 61.
  • the water pump 19 is operated by forced rotation of the input shaft 19a, and the input shaft 19a is connected to the output shaft 10a of the internal combustion engine 10 via the clutch mechanism 20. Is adopted. Then, by disengaging the clutch mechanism 20 from the input shaft 19a of the water pump 19 and the output shaft 10a of the internal combustion engine 10, the operation of the water pump 19 is stopped. The pumping amount of the cooling water is set to “0”.
  • the water pump 19 is restarted each time the internal combustion engine 10 is restarted in a situation where the clutch mechanism 20 is in a disconnected state so that the cooling water pumping amount of the water pump 19 is set to “0”.
  • the switching of the operating state of the clutch mechanism 20 is frequently performed (a state indicated by a one-dot chain line in FIG. 6). That is, the clutch mechanism 20 is disconnected when the internal combustion engine 10 is automatically stopped, and the clutch mechanism 20 is repeatedly connected when the internal combustion engine 10 is restarted thereafter. Such repeated switching operation of the clutch mechanism 20 may reduce the durability of the clutch mechanism 20.
  • the clutch mechanism 20 is switched from the non-connected state to the connected state every time the internal combustion engine 10 is restarted. Therefore, the number of times that the operating state of the clutch mechanism 20 is switched can be extremely reduced, and the durability performance of the clutch mechanism 20 can be improved.
  • the circulation mode of the cooling water is better as it is simpler, and the cooling water circulation is continued or the cooling water circulation is stopped. Is desirable.
  • the water pump 19 is maintained in the operation stopped state, so that it is possible to accurately estimate the cooling water temperature.
  • the cooling water pumping amount of the water pump 19 is set to “0”, the fuel consumption amount of the internal combustion engine 10 is compared with a device in which a small amount of cooling water is pumped and circulated in the cooling system 18.
  • the degree of cooling by the cooling system 18 can be made extremely small, and warming up of the internal combustion engine 10 can be completed earlier.
  • the water pump 19 is operated regardless of the temperature of the cooling water over a predetermined period immediately after the start of the internal combustion engine 10 by the operation start switch 61, and the water pump 19 pumps the cooling water. . Therefore, a temperature useful as the temperature of the cooling water in the cooling system 18 when the internal combustion engine 10 is started by operating the operation start switch 61 can be detected appropriately.
  • the method for calculating the estimated value of the cooling water temperature (in the above embodiment, the estimated water temperature VT [en], VT [egr]) can be arbitrarily changed.
  • the parameters used for the calculation engine rotational speed NE, fuel injection amount Q, cooling water temperature THW [en], THW [egr], or the like can be used.
  • a cooling device having a structure in which the input shaft 19a of the water pump 19 is connected to the output shaft 10a of the internal combustion engine 10 via the clutch mechanism 20, but a device provided with a water pump capable of changing the cooling water pumping amount. If there is, the cooling device according to the above embodiment can be applied after the configuration thereof is appropriately changed.
  • a water pump for example, an electric pump capable of changing the cooling water pumping amount by adjusting power supplied from the battery 28, a swash plate pump capable of changing the cooling water pumping amount by changing the angle of the swash plate, and the like. Can be mentioned.
  • the cooling water pumping amount of the water pump 19 may be limited to a smaller amount than when the temperature is high.
  • a predetermined period immediately after the start of the internal combustion engine 10 by the operation of the operation start switch 61 it is limited to setting a period from when the internal combustion engine 10 is started until [Condition 6] and [Condition 7] are both satisfied. Any period can be set. For example, a period from when the internal combustion engine 10 is started by operating the operation start switch 61 until only [condition 7] is satisfied, or a certain time (for example, several tens of seconds or several minutes) is set as the predetermined period. be able to.
  • the process of operating the water pump 19 without depending on the coolant temperature immediately after the internal combustion engine 10 is started by operating the operation start switch 61 may be omitted. That is, immediately after the temperature of the cooling water at the start of the internal combustion engine 10 is low, the cooling water pumping amount of the water pump 19 is set to “0” or compared to when the temperature is high. The cooling water pumping amount may be limited to a small amount.
  • Output shaft 60 ... Electronic control device, 61 ... Operation start switch, 62 ... Speed sensor, 63 ... Temperature sensor, 64 ... Temperature sensor, 65 ... Rotation sensor, 66 ... Accelerator operation amount sensor, 67 ... Idle switch, 68 ... Brake Switch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

La présente invention est pourvue d'une pompe à eau qui pompe l'eau de refroidissement dans un système de refroidissement, et avec laquelle la quantité pompée peut être modifiée. Un procédé d'arrêt automatique, au cours duquel le moteur à combustion interne est arrêté automatiquement de manière temporaire en fonction d'un état d'arrêt prescrit, et un procédé de redémarrage, au cours duquel le moteur à combustion interne est redémarré en fonction d'une condition de redémarrage prescrite, sont exécutés. Lorsque la température de l'eau de refroidissement dans le système de refroidissement est basse, la quantité d'eau de refroidissement pompée par la pompe à eau tandis que le moteur à combustion interne est automatiquement arrêté et la quantité d'eau de refroidissement pompée par la pompe à eau pendant l'entraînement après le redémarrage du moteur à combustion interne sont limitées (t3-t4) à une quantité qui est inférieure à celle constatée lorsque la température de l'eau de refroidissement est supérieure.
PCT/JP2011/074717 2011-10-26 2011-10-26 Dispositif de refroidissement pour moteur à combustion interne WO2013061431A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/074717 WO2013061431A1 (fr) 2011-10-26 2011-10-26 Dispositif de refroidissement pour moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/074717 WO2013061431A1 (fr) 2011-10-26 2011-10-26 Dispositif de refroidissement pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
WO2013061431A1 true WO2013061431A1 (fr) 2013-05-02

Family

ID=48167298

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/074717 WO2013061431A1 (fr) 2011-10-26 2011-10-26 Dispositif de refroidissement pour moteur à combustion interne

Country Status (1)

Country Link
WO (1) WO2013061431A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002161748A (ja) * 2000-11-27 2002-06-07 Denso Corp 車両用電動ウオーターポンプ装置
JP2006342680A (ja) * 2005-06-07 2006-12-21 Toyota Motor Corp 内燃機関の冷却装置
WO2011104885A1 (fr) * 2010-02-26 2011-09-01 トヨタ自動車 株式会社 Dispositif pour commander un moteur à combustion interne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002161748A (ja) * 2000-11-27 2002-06-07 Denso Corp 車両用電動ウオーターポンプ装置
JP2006342680A (ja) * 2005-06-07 2006-12-21 Toyota Motor Corp 内燃機関の冷却装置
WO2011104885A1 (fr) * 2010-02-26 2011-09-01 トヨタ自動車 株式会社 Dispositif pour commander un moteur à combustion interne

Similar Documents

Publication Publication Date Title
US6889125B2 (en) Vehicle driving apparatus
JP2011116366A (ja) ハイブリッド電気自動車における冷却システムの補助ポンプ構成
US20130284127A1 (en) Engine cooling device
KR20110063167A (ko) 가변형 워터펌프 제어장치 및 방법
KR101294424B1 (ko) 수냉식 터보차져 시스템 및 이의 운영방법
JP2002161748A (ja) 車両用電動ウオーターポンプ装置
KR102217930B1 (ko) 하이브리드 차량
JP3956812B2 (ja) エンジンの冷却制御装置及びその冷却制御装置を備えた車両
JP5338761B2 (ja) 車載内燃機関の冷却装置
CN110682764B (zh) 车辆的制热装置
JP5381675B2 (ja) 排気駆動式過給機の冷却装置及びこれを具備する内燃機関の制御装置
JP2006051852A (ja) ハイブリッド車両の暖房装置
JPH10252464A (ja) ハイブリッド電気自動車の動力装置冷却装置
EP3346115B1 (fr) Procédé de commande de déplacement de véhicule et dispositif de commande de déplacement de véhicule
JP2011007072A (ja) 内燃機関の制御装置
WO2013061431A1 (fr) Dispositif de refroidissement pour moteur à combustion interne
JP5863360B2 (ja) 内燃機関の制御装置
JP5027289B2 (ja) エンジン冷却装置
JP5609346B2 (ja) 車載内燃機関の冷却装置
JP2009173124A (ja) ハイブリッド車およびその制御方法
US11565686B2 (en) Hybrid vehicle control apparatus
JP2007326464A (ja) ハイブリッド車両の制御装置
JP2012031811A (ja) 電動ウォーターポンプの制御装置
JP6354238B2 (ja) ハイブリッド車両及びその制御方法
JP2006161745A (ja) 車両の制御装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11874711

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11874711

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP