JP2019142252A - Vehicle control system and vehicle equipped with the same - Google Patents

Abstract

To provide a vehicle control system and a vehicle equipped with the same that can reflect the intension of a driver with respect to switching a traveling mode including an EV mode and a series mode.SOLUTION: A vehicle control system 18 controls a vehicle 1 including a motor (traveling motor 2), an engine 3 and a generator 4. The vehicle control system 18 includes a control device (hybrid control unit 12) that controls the vehicle 1 in a predetermined traveling mode, and a switch device (shift lever device 16) that switches a traveling mode. The traveling mode includes an EV mode and a series mode. The EV mode and the series mode can be switched manually by a driver's operation of the switch device.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle control system and a vehicle equipped with the vehicle control system.

  Conventionally, as a travel mode of a plug-in hybrid electric vehicle (PHEV), an EV mode in which the engine is stopped and the vehicle is driven by the power of the motor, and a series mode in which the generator is operated by the power of the engine and the motor is driven by the power of the motor; A parallel mode in which the vehicle travels with the power of both the engine and the motor is known (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2006-159830

  In the prior art including Patent Document 1, the EV mode and the series mode are automatically switched by various controls so that the optimum travel mode is selected according to the travel situation. For this reason, the engine may repeatedly drive or stop regardless of the driver's intention, the engine speed (engine sound) and the vehicle speed may deviate, and the driver may feel uncomfortable.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicle control system capable of reflecting the driver's intention in switching between driving modes including EV mode and series mode, and a vehicle equipped with the vehicle control system. And

  A first aspect of the present invention that solves the above problem is a vehicle control system that controls a vehicle including a motor, an engine, and a generator. The vehicle control system controls the vehicle in a predetermined travel mode. A control device, and a switching device for switching the travel mode, wherein the travel mode stops the driving of the engine and drives the motor, and the EV mode causes the vehicle to travel by the power of the motor; A series mode in which the generator is operated by the power obtained by driving the engine and the motor is driven, and the vehicle is driven by the power of the motor, and the EV mode and the series mode are The vehicle control system can be switched manually by operating the switching device.

  In the first aspect, since the EV mode and the series mode can be manually switched, the driver's intention can be reflected in the switching of the driving mode including these modes. Therefore, according to the first aspect, it is expected that the charge amount (SOC) of the battery capable of supplying power to the motor can be self-managed, the engine can be determined to drive or stop by itself, and the vehicle is driven. It leads to improvement of fun to do.

  A second aspect of the present invention is the vehicle control system according to the first aspect, wherein the traveling mode drives the engine and drives the motor, and uses the power of the engine and the power of the motor. The vehicle control system further includes a parallel mode in which the vehicle travels, wherein the EV mode, the series mode, and the parallel mode can be manually switched by an operation of the switching device by a driver.

  In the second aspect, since the EV mode, the series mode, and the parallel mode can be manually switched, the driver's intention can be reflected in the switching of the driving mode including these modes.

  According to a third aspect of the present invention, there is provided the vehicle control system according to the second aspect, wherein the control device is configured such that when the travel mode is the EV mode, the SOC of a battery capable of supplying power to the motor. A vehicle control system that performs control for prompting a driver to switch to the series mode or the parallel mode when the vehicle speed is less than a predetermined threshold value or the vehicle speed is equal to or higher than a predetermined threshold value. is there.

  In the third aspect, when it is preferable to switch from the EV mode to the series mode or the parallel mode, since the control for prompting the driver to perform the switching is performed, the driver's intention is easily reflected in the switching of the driving mode including these modes. .

  A fourth aspect of the present invention is the vehicle control system according to the second aspect or the third aspect, wherein the control device has a predetermined speed when the traveling mode is the series mode. The vehicle control system performs control for prompting the driver to switch the travel mode to the parallel mode when the threshold is equal to or greater than the threshold.

  In the fourth aspect, when it is preferable to switch from the series mode to the parallel mode, control for prompting the driver to perform the switching is performed, so that the driver's intention is easily reflected in the switching of the driving mode including these modes.

  According to a fifth aspect of the present invention, in the vehicle control system according to the third aspect or the fourth aspect, the control for prompting the driver to switch the traveling mode is performed indirectly to the driver. The vehicle control system is characterized in that the control is to prompt the user.

  In the fifth aspect, when it is preferable to switch from the EV mode to the series mode or the parallel mode, or when it is preferable to switch from the series mode to the parallel mode, the driving mode is indirectly prompted to the driver. The intention of the driver can be reflected in the switching of the driving mode including the mode. Further, in the fifth aspect, the driver can easily obtain a feeling that the driving mode has been switched based on his own motive, so that the driver can switch the driving mode directly by generating a display or sound. It is easy to improve the fun of driving a vehicle.

  A sixth aspect of the present invention is the vehicle control system according to any one of the second to fifth aspects, wherein a plurality of shift speeds are set in the parallel mode, The vehicle speed can be manually switched by operating the switching device by a driver.

  In the sixth aspect, since the driver can manually switch a plurality of shift speeds in the parallel mode, not only the EV mode, the series mode and the parallel mode but also the gear ratio in the parallel mode can be switched. Can reflect the intentions.

  A seventh aspect of the present invention is the vehicle control system according to any one of the second to sixth aspects, wherein the switching device includes at least one shift pattern having an H shape, A vehicle control system comprising a shift lever operable along a shift pattern.

  In the seventh aspect, the driving mode including the EV mode, the series mode, and the parallel mode can be switched by operating the shift lever along the shift pattern, so that it is easy for the driver to obtain a sense of switching the driving mode. . Therefore, according to the sixth aspect, the driver's intention can be reflected in the switching of the driving mode, and the joy of driving the vehicle is further improved.

  An eighth aspect of the present invention is the vehicle control system according to any one of the second to seventh aspects, wherein the traveling mode includes the EV mode, the series mode, and the parallel mode. A drive mode that automatically switches, and a brake mode that has a regeneration level different from that of the drive mode, and the EV mode, the series mode and the parallel mode, the drive mode, and the brake mode are controlled by an operation of the switching device by a driver. The vehicle control system is characterized in that it can be switched manually.

  In the eighth aspect, the driver's intention can be reflected not only in the EV mode, the series mode, and the parallel mode, but also in the switching of the driving mode further including the drive mode and the regeneration mode.

  Another aspect (9th aspect) of the present invention that solves the above problems is a vehicle including a motor, an engine, and a generator, and the vehicle includes a control device that controls the vehicle in a predetermined traveling mode. A switching device for switching the travel mode, wherein the travel mode stops the driving of the engine and drives the motor to drive the vehicle by the power of the motor, and the engine. A series mode in which the generator is operated by driving power and the motor is driven and the vehicle is driven by the power of the motor, and the EV mode and the series mode are switched by the driver. The vehicle is characterized in that it can be switched manually by operating the device.

  In the ninth aspect, since the EV mode and the series mode can be switched manually, the driver's intention can be reflected in the switching of the driving mode including these modes. Therefore, according to the eighth aspect, it is expected that the charge amount (SOC) of the battery capable of supplying electric power to the motor can be self-managed, the engine can be determined to be driven or stopped by itself, and the vehicle is driven. It leads to improvement of fun to do.

  According to the vehicle control system and the vehicle equipped with the vehicle control system according to the present invention, the driver's intention can be reflected in the switching of the driving mode including the EV mode and the series mode.

1 is a diagram illustrating a configuration example of a vehicle according to a first embodiment. FIG. 3 is a diagram illustrating a configuration example of a control device according to the first embodiment. The figure which shows the driving mode corresponding to a shift position in Embodiment 1. FIG. The figure which shows the example of control which urges | switches driving modes in Embodiment 1. FIG. 6 is a diagram illustrating a configuration example of a control device according to a second embodiment. The figure which shows the example of control which accelerates | stimulates switching of driving modes in Embodiment 2. The figure which shows the example of control which accelerates | stimulates switching of driving modes in Embodiment 2. The figure which shows the example of control which accelerates | stimulates switching of driving modes in Embodiment 2. FIG. 4 is a diagram illustrating an example of a shift pattern that can be employed in the first and second embodiments.

  Embodiments according to the present invention will be described with reference to the drawings. The following embodiment is one aspect of the present invention, and can be arbitrarily changed within the scope of the present invention. In each figure and description, the same members are denoted by the same reference numerals, and description thereof is omitted as appropriate. The scale and shape of each part in each figure may be changed as appropriate for the convenience of describing a configuration example of each part.

(Embodiment 1)
FIG. 1 is a diagram illustrating a configuration example of a vehicle 1 according to the present embodiment. The vehicle 1 is a four-wheel drive plug-in hybrid electric vehicle (PHEV) that uses a travel motor 2 (front motor 2F and rear motor 2R) and an engine 3 as travel drive sources.

  The front motor 2F is driven by power supply from the generator (generator 4) and the battery 5 via the front inverter 6F. The front wheel 9F can be rotated by transmitting the power obtained by driving the front motor 2F to the drive shaft 8F via the front transaxle 7F. The rear motor 2R is driven by power supply from the generator 4 and the battery 5 via the rear inverter 6R. The rear wheel 9R can be rotated by transmitting the power obtained by driving the rear motor 2R to the drive shaft 8R via the rear transaxle 7R.

  The engine 3 is driven by the combustion of fuel. The front wheel 9F can be rotated by transmitting the power obtained by driving the engine 3 to the drive shaft 8F via the front transformer axle 7F. Transmission of power between the engine 3 and the drive shaft 8F can be connected or released by the clutch 10 in the front transaxle 7F. When power is transmitted between the engine 3 and the drive shaft 8F, the clutch 10 is in a connected state, and when power is not transmitted, the clutch 10 is in an open state.

  In addition, power can be generated by operating the generator 4 via the front transformer ASKUL 7F with the power obtained by driving the engine 3. The generated electric power can be supplied to the front motor 2F and the rear motor 2R, and the battery 5 can be charged via the front inverter 6F. An engine control unit 11 is connected to the engine 3. The engine control unit 11 controls driving of the engine 3 based on a control signal from the hybrid control unit 12.

  The battery 5 is configured as a battery module including a plurality of battery cells. The battery 5 is connected to a battery monitoring unit 13 that monitors the temperature of the battery module, the amount of charge (SOC: State Of Charge), and the like.

  The front inverter 6F includes a front motor control unit 14F and a generator control unit 15. The front motor control unit 14F controls the output of the front motor 2F based on the control signal from the hybrid control unit 12. The generator control unit 15 controls the amount of power generated by the generator 4 based on the control signal from the hybrid control unit 12. The rear inverter 6R includes a rear motor control unit 14R. The rear motor control unit 14R controls the output of the rear motor 2R based on the control signal from the hybrid control unit 12.

  The vehicle 1 is provided with a switching device (shift lever device 16) for switching the traveling mode. That is, the driver can select the travel mode corresponding to the shift position by moving the shift lever 17 of the shift lever device 16 to a predetermined shift position. The vehicle 1 includes various sensors such as a temperature sensor 19 for detecting the temperature of the battery module, an accelerator opening sensor 20 for detecting the accelerator operation amount, and a vehicle speed sensor 21 for detecting the vehicle speed V. Is provided.

  The hybrid control unit 12 corresponds to the control device according to the present embodiment and performs comprehensive control of the vehicle 1. The hybrid control unit 12 and the shift lever device 16 constitute a vehicle control system 18 (see FIG. 2 and the like).

  FIG. 2 is a block diagram illustrating a configuration example of the hybrid control unit 12. The hybrid control unit 12 is configured around a microcomputer, and each unit is realized by executing a program by the microcomputer. The hybrid control unit 12 is provided with a ROM in which various control programs and data information are stored in advance, a storage unit in which the control results of each unit are stored, a timer counter, and the like.

  On the input side of the hybrid control unit 12, an engine control unit 11, a battery monitoring unit 13, a front motor control unit 14F, a rear motor control unit 14R, a generator control unit 15, a shift lever device 16, a temperature sensor 19, an accelerator opening sensor 20, a vehicle speed sensor 21 and the like are connected. Various detection values and information input to the hybrid control unit 12 from these units, devices, sensors, and the like are used for various controls of the vehicle 1.

  To the output side of the hybrid control unit 12, a front motor control unit 14F, a generator control unit 15, a rear motor control unit 14R, a front transaxle 7F (clutch 10), an engine control unit 11, and the like are connected.

  The hybrid control unit 12 includes a travel mode acquisition unit 22, a target torque calculation unit 23, and a drive control unit 24. The travel mode acquisition unit 22 acquires the travel mode selected by the driver by reading information input from the shift lever device 16. Information regarding the travel mode acquired by the travel mode acquisition unit 22 is transmitted to the drive control unit 24.

  The target torque calculation unit 23 reads various detection values, information, and the like including the detection value of the accelerator opening sensor 20, and calculates an output (requested torque Tp) required for the vehicle 1. Further, the drive control unit 24 controls the driving of the traveling motor 2 and the engine 3 in accordance with the traveling mode so as to realize the required torque Tp. Further, the drive control unit 24 controls the driving of the engine 3 and the generator 4 according to the travel mode, and controls the charge amount SOC of the battery 5.

FIG. 3 is a diagram illustrating a travel mode of the vehicle 1 corresponding to the shift position of the shift lever device 16. The travel modes include EV mode, series mode, parallel mode and drive mode. The shift position of the shift lever device 16 includes E position (E position) and R position (R position) corresponding to the EV mode, and series mode. There are an S position (S position) corresponding to, a P position (P position) corresponding to the parallel mode, and a D position (D position) corresponding to the drive mode. Among the parallel mode, a parallel mode corresponding to P ₁ position, different from the parallel mode and, in the shift speed corresponding to the P ₂ position, towards the parallel mode corresponding to the P ₂ position and the gear ratio is set higher Yes. The R position is for back travel.

  In the EV mode, the clutch 10 is in an open state, the driving of the engine 3 is stopped, and the traveling motor 2 is driven by the electric power supplied from the battery 5 so that the vehicle 1 travels with the power of the traveling motor 2. Let In the series mode, the clutch 10 is in an open state, the generator 4 is operated by the power obtained by driving the engine 3, and the traveling motor 2 is driven, whereby the vehicle 1 is driven by the power of the traveling motor 2. Let it run. Further, in the series mode, the rotation speed of the engine 3 is maintained in a high efficiency, that is, in a good fuel efficiency range, and the electric power generated by the surplus output is charged in the battery 5.

  In the parallel mode, the clutch 10 is in the connected state, and the driving motor 2 is driven by the electric power generated by driving the engine 3 and operating the generator 4 by the engine 3 and the electric power supplied from the battery 5. The vehicle 1 is caused to travel by the power of the engine 3 and the power of the traveling motor 2.

  In the drive mode, the EV mode, the series mode, and the parallel mode are automatically switched, and the vehicle 1 is caused to travel in the current travel mode. In the drive mode, switching between the parallel mode, the series mode, and the EV mode is performed based on the vehicle speed V, the charge amount SOC, and the like. For example, the parallel mode is selected when the vehicle speed V is equal to or higher than a predetermined switching vehicle speed Vn set based on the charge amount SOC of the battery 5, and the series mode or the vehicle speed V is less than the switching vehicle speed Vn. The EV mode is selected. That is, in the drive mode, the parallel mode is selected when the efficiency of the engine 3 is high, such as when the vehicle 1 is in a high speed state, and the higher the efficiency of the engine 3 is, the higher the parallel mode with a higher gear ratio is selected. Is done.

  In the drive mode, switching between the EV mode and the series mode is performed based on the required torque Tp, the charge amount SOC, and the like. For example, the series mode is selected when the required torque Tp is high, and the EV mode is selected when the required torque Tp is low and the charge amount SOC is high. Even if the required torque Tp is low, the series mode is selected when the charge amount SOC is low.

  Here, when the travel mode is the EV mode, the series mode, or the parallel mode, the drive control unit 24 gives priority to the control that prompts the driver to switch the travel mode over the control that automatically switches the travel mode. The control that prompts the driver to switch the travel mode is a control that can promptly or indirectly prompt the driver to switch the travel mode. Here, control for directly prompting the driver to switch the driving mode is employed. Examples of the control include displaying an image on the liquid crystal window (display unit) of the vehicle 1 and playing a sound from a speaker so as to switch the driving mode. As the display unit and the speaker, known ones near the dashboard of the vehicle 1 can be used, but a dedicated display unit or speaker may be newly provided for the purpose.

  FIG. 4 is a diagram illustrating an example of control that is performed by the hybrid control unit 12 to prompt the driver to switch the traveling mode. When the EV mode is selected by the driver, the hybrid control unit 12 does not automatically switch the traveling mode but maintains the EV mode. When the charge amount SOC is less than the predetermined threshold value a or the required torque Tp is equal to or greater than the predetermined threshold value b, the driver is prompted to switch the traveling mode to the series mode.

  The SOC threshold a is a value set for the purpose of preventing overdischarge of the battery. In other words, the output abruptly decreases when the charge amount SOC decreases to a predetermined value or less, so the threshold value a is set so that switching to the series mode is performed before the charge amount SOC decreases to the predetermined value or less. Is done. Further, the threshold value b of the required torque Tp is, for example, a battery output upper limit value. Since the battery output has an upper limit, when the maximum motor output that achieves the required torque Tp exceeds the battery output, the motor output that is realized by the upper limit of the battery output becomes the torque upper limit. When further torque is required, for example, by switching to the series mode, the motor output can be covered with the power generation amount of the generator in addition to the battery output.

  When the series mode is selected by the driver, the hybrid control unit 12 does not automatically switch the running mode but maintains the series mode. When the charge amount SOC is equal to or greater than the threshold value c (threshold value: c ≧ a) and the required torque Tp is less than the threshold value b, the driver is prompted to switch the traveling mode to the EV mode. Here, since the SOC threshold c is set for the purpose of preventing overcharging of the battery, it is set to a value equal to or lower than full charge.

When the EV mode or the series mode is selected by the driver, the hybrid control unit 12 prompts the driver to switch the traveling mode to the parallel mode when the vehicle speed V is equal to or higher than the switching vehicle speed Vn. Depending on the vehicle speed V, the driver may be prompted to switch to a higher gear ratio parallel mode. For example, if the EV mode or series mode is selected by the driver, when the vehicle speed V is switching vehicle speed Vn above, switched in parallel mode corresponding to P ₁ position and the vehicle speed V is a switching vehicle speed Vn2 more when, to switch to the parallel mode corresponding to the _{P 2} position, it may prompt the driver (switching vehicle speed: Vn2> Vn). Similarly, by the driver, if the parallel mode corresponding to P ₁ position is selected, when the vehicle speed V is switching vehicle speed Vn2 above, to switch to the parallel mode corresponding to the P ₂ position may prompt the driver .

  Here, the switching vehicle speed Vn is set to a vehicle speed or the like in which the fuel consumption in the parallel mode is higher than the fuel consumption in the EV mode or the series mode. That is, the hybrid control unit 12 prompts the driver to switch the traveling mode to the parallel mode in a situation where the fuel efficiency in the parallel mode exceeds the fuel efficiency in the EV mode or the series mode. In addition to the switching vehicle speed Vn, for the purpose of suppressing the heat generation of the motor or generator, when the motor temperature or the generator temperature exceeds a set threshold value, switching to the parallel mode mainly for engine running is performed. You may encourage.

When the parallel mode is selected by the driver, the hybrid control unit 12 maintains the traveling mode in the parallel mode without automatically switching the traveling mode. When the vehicle speed V is less than the switching vehicle speed Vn, the driver is prompted to switch to the EV mode or the series mode. Depending on the vehicle speed V, the driver may be prompted to switch to a parallel mode with a lower gear ratio. For example, the driver, if the parallel mode corresponding to the P ₂ position is selected, when the vehicle speed V is off than vehicle velocity Vn2 and switching vehicle speed Vn above, to switch to the parallel mode corresponding to P ₁ position, the driver You may be prompted.

  The timing for prompting the driver to switch the driving mode may be the same as or different from the timing for automatically switching the driving mode in the drive mode. If both timings are different, when the EV mode, series mode or parallel mode is selected by the driver, the driving mode is switched at a timing earlier or later than the timing at which the driving mode is automatically switched in the drive mode. The driver can be prompted.

  As described above, in the vehicle control system 18 and the vehicle 1, the EV mode, the series mode, and the parallel mode can be manually switched by operating the shift lever device 16 by the driver. Can be reflected. Therefore, according to the vehicle control system 18 and the vehicle 1, it is expected that the amount of charge (SOC) of the battery 5 can be self-managed, the drive or stop of the engine 3 can be determined by itself, and the enjoyment of driving the vehicle. It leads to improvement.

  Moreover, in the vehicle control system 18 and the vehicle, when it is preferable to switch from the EV mode to the series mode or the parallel mode, when it is preferable to switch from the series mode to the EV mode or the parallel mode, further, from the parallel mode to the EV mode or When it is preferable to switch to the series mode, since control for prompting the driver to perform the switching is performed, it is easy to reflect the driver's intention in the switching of the driving mode including these modes.

  Further, in the vehicle control system 18 and the vehicle, since the driver can manually switch a plurality of shift speeds in the parallel mode, not only the driving mode including the EV mode, the series mode, and the parallel mode but also the parallel mode can be switched. The driver's intention can be reflected in the gear ratio switching. If the gear ratio in the parallel mode can be suitably switched, further improvement in fuel consumption is expected.

In the vehicle control system 18 and the vehicle, as a plurality of shift speeds in the parallel mode, employing a two-stage P ₁ position and P ₂ positions. However, the plurality of shift stages in the parallel mode is not limited to two stages, and may be three stages, four stages, or more. If a plurality of gear position is the third stage is provided with a P ₃ position in the shift pattern of the shift lever device 16, in parallel mode corresponding to P ₃ position may be employed to enable control of the vehicle 1. If a plurality of gear position is the fourth step is provided with a P ₃ position and P ₄ located on the shift pattern of the shift lever device 16, the vehicle 1 in parallel mode corresponding to each of the P ₃ position and P ₄ positions It only needs to be controllable.

(Embodiment 2)
FIG. 5 is a block diagram illustrating a configuration example of the hybrid control unit 12A. The hybrid control unit 12A includes a travel mode acquisition unit 22A, a target torque calculation unit 23, a drive control unit 24A, and a torque suppression unit 25. Among these, the target torque calculator 23 is the same as that of the first embodiment.

  Information on the travel mode acquired by the travel mode acquisition unit 22A is transmitted to the drive control unit 24A and the torque suppression unit 25. The torque suppression unit 25 outputs an instruction signal for suppressing the required torque Tp to the target torque calculation unit 23 according to the travel mode. When the drive control unit 24A receives the instruction signal from the torque suppression unit 25, the drive control unit 24A controls the vehicle 1 to suppress the required torque Tp and realize the suppressed required torque Tp ′.

  FIG. 6 is a diagram illustrating an example of control performed by the hybrid control unit 12A to prompt the driver to switch the travel mode. The hybrid control unit 12A directly prompts the driver to switch the driving mode at the same timing as the control according to the first embodiment. Here, as control for prompting the driver to switch the travel mode, control for indirectly prompting the driver to switch the travel mode is also employed. Examples of the control include suppressing the required torque Tp.

When the EV mode is selected by the driver, the hybrid control unit 12A determines that the charge amount SOC is less than a predetermined threshold value d (threshold value d> threshold value a) or the required torque Tp is a predetermined threshold value e (threshold value e <threshold value b). At the above time, the required torque Tp is suppressed. When the EV mode or the series mode is selected by the driver, the hybrid control unit 12A suppresses the required torque Tp when the vehicle speed V is equal to or higher than the switching vehicle speed Vm (switching vehicle speed: Vm <Vn). Further, by the driver, if the parallel mode corresponding to _{P 1} position is selected, the hybrid control unit 12A, when the vehicle speed V is not less than switching vehicle speed Vm2, the required torque Tp is suppressed (switching vehicle speed: Vm2 <Vn2, Vm2> Vm).

  7 and 8 are time charts showing an example of control for prompting the driver to switch the driving mode. FIG. 7 is a control example that prompts switching from the EV mode to the series mode, and FIG. 8 is a control example that prompts switching from the series mode to the parallel mode.

  As shown in FIG. 7, the hybrid control unit 12A directly prompts the driver to switch to the series mode, for example, by display or sound at the time t2 when the charge amount SOC becomes lower than the threshold value a. On the other hand, the torque is suppressed at time t1 (time earlier than time t2) when the charge amount SOC becomes lower than the threshold value d (threshold value: d> a). Further, as shown in FIG. 8, the hybrid control unit 12A directly prompts the driver to switch to the parallel mode, for example, by display or sound at a time point t2 when the vehicle speed V becomes equal to or higher than the switching vehicle speed Vn. On the other hand, the torque is suppressed at time t1 (time earlier than time t2) when the vehicle speed V becomes equal to or higher than the switching vehicle speed Vm (switching vehicle speed: Vm <Vn).

  That is, in the vehicle control system 18A and the vehicle 1A, the required torque Tp is suppressed at a time earlier than the time when the driver is directly prompted to switch the travel mode by setting the threshold values d and e and the switching vehicle speeds Vm and Vm2. Control is performed. According to this, before prompting the driver to switch the driving mode directly, the driver himself thinks about switching to the driving mode in which higher driving force can be obtained, and the switching is expected to be executed. . 7 and 8, the torque suppression degree is increased exponentially with the passage of time after the time point t1, but the torque suppression degree is equidistant with respect to the passage of time. May be increased.

Above, the vehicle control system 18A and the vehicle 1A, the series mode from the EV mode, the parallel mode from the EV mode or series mode, or to switch from the parallel mode corresponding to P ₁ located in parallel mode corresponding to the P ₂ position Is preferable, a control for indirectly instructing the driver to switch the driving mode is performed. Thereby, the driver's intention can be reflected in the switching of the driving modes including these modes. Further, in the vehicle control system 18A and the vehicle 1A, the driver can obtain a real feeling that the driving mode has been switched based on his / her motives. Rather than prompting the vehicle to improve the enjoyment of driving the vehicle 1A.

  In the vehicle control system 18A and the vehicle 1A, control is performed to suppress the required torque Tp at a time earlier than the time when the driver is directly prompted to switch the travel mode by setting the threshold values d and e and the switching vehicle speeds Vm and Vm2. went. There is a time lag between when the driver tries to switch the driving mode based on his own motives and when the driving mode is actually switched, but by performing control that indirectly prompts the driver to switch the driving mode at an early point in time. , The influence of such a time lag can be reduced.

  However, the timing for indirectly instructing the driver to switch the driving mode may be the same as the timing for directly instructing the driver to switch the driving mode. Further, control that indirectly prompts the driver to switch the traveling mode may be performed at a timing later than the timing that prompts the driver to directly switch the traveling mode.

(Embodiment 3)
The vehicle control system and the vehicle according to the present embodiment propose a configuration example of the shift lever device 16 that can be employed in the first and second embodiments.

  FIGS. 9A to 9D are diagrams showing an example of a shift pattern of the shift lever device 16 that can be employed in each of the first and second embodiments. The shift lever device 16 includes a shift pattern 26 having at least one H shape, and a shift lever 17 (see FIG. 1) that can be operated along the shift pattern 26.

  The shift pattern 26 is provided with six shift positions (upper left position, lower left position, upper center position, lower center position, upper right position and lower right position), and the center position which is not any of these positions is set as the neutral position. ing. These shift positions are learned from the shift patterns used in manual vehicles, with the exception of the upper left position and lower right position, but basically the lower left position, upper center position, lower center position and In the order of the upper right position, the position corresponds to a travel mode in which more driving force can be obtained. The driver can operate the shift lever 17 in the horizontal direction and the vertical direction along the shift pattern 26.

In the shift pattern 26A of the shift lever device 16A shown in FIG. 9A, in the six shift positions, the upper left position is the D position, the lower left position is the E position, the upper center position is the S position, the lower center position is the P ₁ position, upper right position P ₂ position and lower right position is the R position. In the shift pattern 26A, the shift lever 17 is operated leftward and upward from the neutral position, the D position is operated leftward and downward, the E position is operated upward, and the S position is operated upward. and the P ₁ position by operating downwards, the P ₂ position by operating to the right and upward direction, the R position by operating the right and downward directions can be chosen.

In the shift pattern 26B of the shift lever device 16B shown in FIG. 9B, six shift positions as shown in FIG. 9A and one additional shift position are provided. In the six shift positions, the upper left position is the E position, the lower left position is the S position, the upper center position is the P ₁ position, the lower center position is the P ₂ position, the upper right position is the P ₃ position, and the lower right position is the P ₄ position. ing. One additional shift position is provided further to the left of the upper left position, and is set to the D position. The D position also serves as the R position, and when traveling in the reverse direction, the vehicle can travel in the reverse direction by operating the shift lever to the D position and pressing a predetermined R button.

In the shift pattern 26C of the shift lever device 16C shown in FIG. 9C, six shift positions as shown in FIG. 9A and one additional shift position are provided. In the six shift positions, the upper left position is the E position, the lower left position is the S position, the upper center position is the P ₁ position, the lower center position is the P ₂ position, the upper right position is the P ₃ position, and the lower right position is the P ₄ position. ing. One additional shift position is provided further to the left of the upper left position, and is in the R position. That is, the vehicle control system and the vehicle that employ the shift lever device 16C shown in FIG.

In the shift pattern 26D of the shift lever device 16D shown in FIG. 9D, six shift positions as shown in FIG. 9A and two additional shift positions are provided. In the six shift positions, the upper left position is the E position, the lower left position is the S position, the upper center position is the P ₁ position, the lower center position is the P ₂ position, the upper right position is the P ₃ position, and the lower right position is the P ₄ position. ing. The two additional shift positions are provided on the further right side of the upper right position and on the further right side of the lower right position, which are the B ₁ position and the B ₂ position, respectively. The B ₁ position and the B ₂ position correspond to a travel mode (brake mode) that is performed in the vehicle 1 and has a known regeneration level different from the drive mode. In the B ₁ position and the B ₂ position, the travel mode is automatically switched as in the drive mode, but the regeneration level is different from the drive mode, that is, the magnitude of the regenerative braking force is different. The regeneration level is not limited to two stages, and three or more stages may be provided.

  As described above, in the vehicle control system 18 and the vehicle 1, by adopting the shift lever devices 16A to 16D, the driver operates the shift lever 17 along the shift patterns 26A to 26D like a shift change of a manual vehicle, The driving modes including the EV mode, the series mode, and the parallel mode can be switched. Therefore, the intention of the driver can be reflected in the switching of the driving mode, and the joy of driving the vehicle 1 is further improved.

(Other embodiments)
The vehicle control system and one aspect of the vehicle according to the present invention have been described above, but the present invention is not limited to any one of the first to third embodiments. Embodiments 1 to 3 can be combined with each other within the scope of the present invention. Within the scope of the present invention, a part of Embodiment 2 and a part of Embodiment 3 can be combined with Embodiment 1, and a part of Embodiment 3 can be combined with Embodiment 2.

  In the above embodiment, the mode in which the EV mode, the series mode, and the parallel mode can be manually switched by the driver has been described. However, at least the EV mode and the series mode may be switched manually by the driver.

  The shift lever device is not limited as long as the driver can operate the shift lever to a shift position corresponding to the EV mode, the series mode, or the parallel mode. The switching device according to the present invention is not limited as long as the driver can select the EV mode, the series mode, or the parallel mode. For example, buttons and switches corresponding to the EV mode, the series mode, or the parallel mode are provided. The operation mode may be changed to switch the driving mode.

  The present invention can be used in the industrial field related to so-called plug-in hybrid electric vehicles.

1,1A Vehicle 2 Driving motor 2F Front motor 2R Rear motor 3 Engine 4 Generator 5 Battery 6F Front inverter 6R Rear inverter 7F Front transformer ASKUL 7R Rear transformer ASKUL 8F Drive shaft 8R Drive shaft 9F Front wheel 9R Rear wheel 10 Clutch 11 Engine control Unit 12, 12A Hybrid control unit 13 Battery monitoring unit 14F Front motor control unit 14R Rear motor control unit 15 Generator control unit 16, 16A-16D Switching device (shift lever device)
17 Shift lever 18, 18A Vehicle control system 19 Temperature sensor 20 Accelerator opening sensor 21 Vehicle speed sensor 22, 22A Traveling mode acquisition unit 23 Target torque calculation unit 24, 24A Drive control unit 25 Torque suppression unit 26, 26A-26D Shift pattern

Claims (9)

A vehicle control system for controlling a vehicle including a motor, an engine, and a generator,
The vehicle control system includes a control device that controls the vehicle in a predetermined travel mode, and a switching device that switches the travel mode.
The travel mode is
An EV mode in which driving of the engine is stopped and the motor is driven, and the vehicle is driven by power of the motor;
A series mode in which the generator is operated by power obtained by driving the engine and the motor is driven, and the vehicle is driven by power of the motor, and
The vehicle control system, wherein the EV mode and the series mode can be manually switched by operating the switching device by a driver. The vehicle control system according to claim 1,
The travel mode is
A parallel mode of driving the engine and driving the motor, and driving the vehicle with the power of the engine and the power of the motor;
The vehicle control system, wherein the EV mode, the series mode, and the parallel mode can be manually switched by an operation of the switching device by a driver. The vehicle control system according to claim 2,
The control device, when the travel mode is in the EV mode,
Control that prompts the driver to switch to the series mode or the parallel mode when the SOC of a battery that can supply power to the motor is less than a predetermined threshold value or the vehicle speed is equal to or higher than a predetermined threshold value A vehicle control system characterized by The vehicle control system according to claim 2 or claim 3,
The control device, when the travel mode is in the series mode,
When the vehicle speed is equal to or higher than a predetermined threshold, the vehicle control system performs control for prompting the driver to switch the travel mode to the parallel mode. The vehicle control system according to claim 3 or 4, wherein
The vehicle control system characterized in that the control that prompts the driver to switch the travel mode is a control that indirectly prompts the driver to switch the travel mode. A vehicle control system according to any one of claims 2 to 5,
A plurality of shift speeds are set in the parallel mode,
The vehicle control system, wherein the plurality of shift speeds can be manually switched by an operation of the switching device by a driver. The vehicle control system according to any one of claims 2 to 6,
The switching device includes a shift pattern having at least one H shape, and a shift lever operable along the shift pattern. The vehicle control system according to any one of claims 2 to 7,
The travel mode is
A drive mode for automatically switching between the EV mode, the series mode and the parallel mode;
A brake mode having a regeneration level different from the drive mode,
The vehicle control system, wherein the EV mode, the series mode, the parallel mode, the drive mode, and the brake mode can be manually switched by an operation of the switching device by a driver. A vehicle equipped with a motor, an engine and a generator,
The vehicle includes a control device that controls the vehicle in a predetermined traveling mode, and a switching device that switches the traveling mode,
The travel mode is
An EV mode in which driving of the engine is stopped and the motor is driven, and the vehicle is driven by power of the motor;
A series mode in which the generator is operated by power obtained by driving the engine and the motor is driven, and the vehicle is driven by power of the motor, and
A vehicle capable of being manually switched between the EV mode and the series mode by operating the switching device by a driver.

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