WO2023051676A1 - 车辆控制方法、存储介质和电子设备 - Google Patents

车辆控制方法、存储介质和电子设备 Download PDF

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Publication number
WO2023051676A1
WO2023051676A1 PCT/CN2022/122518 CN2022122518W WO2023051676A1 WO 2023051676 A1 WO2023051676 A1 WO 2023051676A1 CN 2022122518 W CN2022122518 W CN 2022122518W WO 2023051676 A1 WO2023051676 A1 WO 2023051676A1
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WIPO (PCT)
Prior art keywords
speed
engine
difference
maximum
preset
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PCT/CN2022/122518
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English (en)
French (fr)
Inventor
柴国耀
宋海军
周博
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长城汽车股份有限公司
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Publication of WO2023051676A1 publication Critical patent/WO2023051676A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • B60W20/10Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15Control strategies specially adapted for achieving a particular effect
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18Propelling the vehicle
    • B60W30/188Controlling power parameters of the driveline, e.g. determining the required power
    • B60W30/1884Avoiding stall or overspeed of the engine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/06Combustion engines, Gas turbines
    • B60W2510/0638Engine speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/08Electric propulsion units
    • B60W2710/083Torque
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

Definitions

  • the present application relates to the technical field of vehicle control, in particular to a vehicle control method, storage medium and electronic equipment.
  • the engine of the vehicle will define the maximum engine speed limit during hardware design, that is, the maximum engine speed that the engine can withstand. If the engine continues to work above the maximum speed, it will have a certain impact on the service life of the engine hardware.
  • the vehicle when the engine speed is greater than or equal to the preset speed threshold, the vehicle will implement an active fuel cut protection strategy, that is, to limit or even cut off the fuel supply to the engine according to the actual speed of the engine, so as to reduce the engine speed.
  • an active fuel cut protection strategy that is, to limit or even cut off the fuel supply to the engine according to the actual speed of the engine, so as to reduce the engine speed.
  • One of the objectives of the embodiments of the present application is to provide a vehicle control method, a storage medium and an electronic device.
  • a vehicle control method including:
  • the target output torque of the vehicle motor is adjusted according to the motor torque coefficient corresponding to the target rotational speed difference range, so as to reduce the target output torque.
  • the difference between the engine speed and the maximum speed is determined from a plurality of preset speed difference ranges.
  • the target speed difference range where the difference lies including:
  • the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to a first preset speed threshold, or the difference obtained by subtracting the maximum speed from the engine speed is greater than or equal to a second preset speed threshold
  • the target speed difference range in which the difference between the engine speed and the maximum speed lies is determined among the multiple preset speed difference ranges.
  • the interval of the preset speed difference range approaches zero as the engine speed increases.
  • the motor torque coefficient decreases as the interval of the preset rotational speed difference range approaches zero.
  • the motor torque coefficient corresponding to the speed difference range where the difference between the engine speed and the maximum speed is located is zero.
  • the target output torque includes the maximum output torque of the electric motor, or the distribution torque of the electric motor.
  • the method when the difference between the engine speed and the maximum speed satisfies a preset condition, the method further includes:
  • the engine is controlled to enter an idle state.
  • the method when the difference between the engine speed and the maximum speed satisfies a preset condition, the method further includes:
  • warning information is used to indicate that the rotational speed of the engine is abnormal.
  • a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the vehicle control method described in any one of the first aspect is implemented.
  • an electronic device including:
  • a processor configured to execute the computer program in the memory, so as to implement the vehicle control method according to any one of the first aspects.
  • the output torque of the motor is adjusted according to the difference, thereby limiting the increase of the axle speed of the vehicle, so as to avoid the speed of the engine from being driven In this way, the actual speed of the engine is prevented from exceeding the maximum speed that the engine can withstand, which effectively protects the engine, helps prolong the service life of the engine, and improves the user experience.
  • beneficial effects of the second aspect and the third aspect provided by the embodiments of the present application are the same as the beneficial effects of the above-mentioned first aspect, please refer to the above-mentioned beneficial effects of the first aspect.
  • Fig. 1 is a flow chart of a vehicle control method according to an exemplary embodiment
  • Fig. 2 is a flow chart of a vehicle control method according to yet another exemplary embodiment
  • Fig. 3 is a flow chart of a vehicle control method according to yet another exemplary embodiment
  • Fig. 4 is a block diagram of a vehicle control device according to an exemplary embodiment
  • Fig. 5 is a block diagram of a vehicle control device according to yet another exemplary embodiment
  • Fig. 6 is a block diagram of an electronic device according to an exemplary embodiment
  • Fig. 7 is a block diagram of a vehicle according to an exemplary embodiment.
  • This application can be applied to the scenario of vehicle control.
  • the engine of the vehicle is running at high speed. If there is no restriction, the engine speed may exceed the engine's capacity. The maximum speed of the engine will cause certain damage to the hardware of the engine and affect the service life of the engine.
  • this application provides a vehicle control method, in the case that the difference between the engine speed and the maximum speed meets the preset conditions, the output torque of the motor is limited according to the difference between the engine speed and the maximum speed, ensuring The engine will not be dragged causing revs to exceed top revs.
  • Fig. 1 is a kind of vehicle control method provided by the embodiment of the present application, as shown in Fig. 1, the vehicle control method includes:
  • the engine speed can be obtained by a speed sensor, and the speed sensor can be set at the crankshaft position of the vehicle.
  • the maximum speed of the engine can be the maximum speed that the engine can withstand without affecting its own service life. The highest rpm can be obtained with this engine.
  • the preset condition is to characterize the tendency of the engine speed to exceed the maximum speed. Wherein, when the difference between the engine speed and the maximum speed is the difference obtained by subtracting the engine speed from the maximum speed, the preset condition includes that the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to A first preset rotational speed threshold; when the difference between the engine rotational speed and the maximum rotational speed is the difference obtained by subtracting the maximum rotational speed from the engine rotational speed, the preset condition includes the engine rotational speed minus the maximum rotational speed The difference is greater than or equal to the second preset speed threshold.
  • Step S102 is described by taking the difference between the engine speed and the maximum speed as the difference obtained by subtracting the engine speed from the maximum speed as an example.
  • the preset speed difference threshold may be a warning difference indicating that the speed of the engine is close to the maximum speed that the engine can withstand.
  • the target speed difference range where the current speed of the engine is located can be determined from multiple preset speed difference ranges, and then executed according to the target speed difference range Steps S103-S104, the multiple preset rotational speed difference ranges are used to represent the multiple stages of the engine rotational speed.
  • the preset rotational speed difference threshold may be 300 rpm.
  • the preset rotational speed difference ranges may be (300rpm, 200rpm), (200rpm, 100rpm), (100rpm, 50rpm), (50rpm, 0rpm) and below 0rpm.
  • the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 300rpm and greater than 200rpm, determine that the difference obtained by subtracting the engine speed from the maximum speed is within the target speed difference range of (300rpm, 200rpm) ;
  • the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 200rpm and greater than 100rpm
  • determine that the difference obtained by subtracting the engine speed from the maximum speed is within the target speed difference range of (200rpm, 100rpm)
  • the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 100rpm and greater than 50rpm, determine that the difference obtained by subtracting the engine speed from the maximum speed is within the target speed difference of (100rpm, 50rpm) Within the range; when the difference obtained
  • the preset speed difference threshold when the engine is in a fault state, in order to prevent the engine from further causing serious faults, the preset speed difference threshold may be appropriately increased, for example, the preset speed difference threshold may be 500 rpm.
  • the multiple preset speed difference ranges may be (500rpm, 300rpm), (300rpm, 200rpm), (200rpm, 100rpm), (100rpm, 50rpm), (50rpm, 0rpm) and below 0rpm.
  • the difference between the engine speed and the maximum speed is the difference obtained by subtracting the maximum speed from the engine speed, it is similar to the above-mentioned embodiment and will not be repeated here.
  • different preset speed difference ranges correspond to different motor torque coefficients
  • the motor torque coefficient is used to adjust the output torque of the motor.
  • the motor torque coefficient corresponding to the engine speed can be obtained through the preset coefficient correspondence relationship.
  • the preset The coefficient correspondence relationship includes motor torque coefficients corresponding to different preset rotational speed difference ranges.
  • the interval of the preset rotational speed difference range is close to zero as the engine rotational speed increases when the engine rotational speed is lower than the maximum rotational speed;
  • the interval of the preset rotational speed difference range is close to zero and decreases. If the motor torque coefficient corresponding to the first preset speed difference range is zero, the first preset speed difference range is the difference between the engine speed and the maximum speed when the engine speed is greater than or equal to the maximum speed The speed difference range where it is located.
  • Preset speed difference range (300rpm, 200rpm) (200rpm, 100rpm) (100rpm, 50rpm) (50rpm, 0rpm) 0rpm and below Motor Torque Coefficient 0.8 0.5 0.3 0.1 0
  • the engine is in a fault state, and the corresponding relationship of the preset coefficients can be shown in Table 2,
  • Preset speed difference range (500rpm, 300rpm) (300rpm, 200rpm) (200rpm, 100rpm) (100rpm, 50rpm) (50rpm, 0rpm) 0rpm and below Motor Torque Coefficient 0.8 0.6 0.4 0.2 0.1 0
  • the difference is the difference obtained by subtracting the maximum rotational speed from the engine rotational speed, refer to the above-mentioned embodiments, and details are not repeated here.
  • the target output torque includes the maximum output torque of the motor; or, the distribution torque of the motor.
  • the distribution torque of the motor represents the output torque of the motor indicated by the vehicle.
  • the distribution torque may be that after the user depresses the accelerator pedal, the vehicle instructs the motor to output the output torque according to the degree of opening and closing of the accelerator pedal, vehicle speed and driving mode. output torque so that the vehicle can quickly respond to the driver's driving intention.
  • the target output torque includes the maximum output torque of the motor
  • the product of the torque coefficient of the motor and the maximum output torque of the motor may be used as the adjusted maximum output torque.
  • the motor torque coefficient decreases in a gradient as the engine speed increases, and then gradually increases Limiting the maximum output torque of the motor prevents the engine speed from being driven to continue to rise.
  • the target output torque includes the distribution torque of the motor
  • the product of the torque coefficient of the motor and the distribution torque of the motor may be used as the adjusted output torque
  • the product of the motor torque coefficient and the distribution torque of the motor is used as the adjusted distribution torque of the motor, and the actual required output torque of the motor is reduced to avoid the engine speed being driven And continue to rise.
  • the output torque of the motor is restricted to different degrees according to the speed of the engine, and the output torque of the motor is gradually increased. Control, and finally controlling the output torque of the motor will not cause further increase in the speed of the engine, thereby ensuring that the hardware of the engine will not be damaged, which is beneficial to prolonging the service life of the engine and improving the user experience.
  • the state of the engine in the case of limiting the output torque of the motor, can also be controlled, as shown in Figure 2, on the basis of the steps shown in Figure 1, the embodiment of the present application can also include follows the steps below:
  • control the engine in the case of limiting the output torque of the electric motor, further in order to prevent the possible increase in the speed of the engine, for example, in the case of failure of the active fuel cut protection strategy of the vehicle, control the engine to enter the idle state , so that the engine no longer receives the torque output demand sent by the vehicle, so that the speed can be controlled at a lower level.
  • the warning information is used to indicate that the engine speed is abnormal.
  • Fig. 4 is a vehicle control device provided by the embodiment of the present application. As shown in Fig. 4, the vehicle control device includes:
  • An acquisition module 401 configured to acquire the engine speed of the vehicle and the maximum engine speed
  • a determining module 402 configured to determine a target speed at which the difference between the engine speed and the maximum speed lies within a plurality of preset speed difference ranges when the difference between the engine speed and the maximum speed satisfies a preset condition difference range;
  • the query module 403 is used to determine the motor torque coefficient corresponding to the target speed difference range, and different preset speed difference ranges correspond to different motor torque coefficients;
  • the control module 404 is configured to adjust the target output torque of the motor of the vehicle according to the motor torque coefficient corresponding to the target speed difference range to reduce the target output torque, the target output torque includes the maximum output torque of the motor; or, the motor distribution torque.
  • the query module 403 is configured to obtain the motor torque coefficient corresponding to the engine speed through the preset coefficient correspondence relationship, and the preset coefficient correspondence relationship includes motor torque coefficients corresponding to different preset speed difference ranges.
  • the interval of the preset speed difference range approaches zero as the engine speed increases; the motor torque coefficient corresponds to the preset speed difference range, and as the engine speed increases, The interval of the preset speed difference range is close to zero and decreases; the motor torque coefficient corresponding to the first preset speed difference range is zero, and the first preset speed difference range is that the engine speed is greater than or equal to the maximum speed In the case of , the speed difference range where the difference between the engine speed and the maximum speed lies.
  • the control module 404 is also used to control the engine to enter the idle state.
  • the vehicle control device further includes an alarm module 405 for sending out alarm information, and the alarm information is used to indicate that the engine speed is abnormal.
  • Fig. 6 is a block diagram of an electronic device 600 according to an exemplary embodiment.
  • the electronic device 600 may include: a processor 601 and a memory 602 .
  • the electronic device 600 may also include one or more of an input/output (I/O) interface 603 and a communication component 604 .
  • I/O input/output
  • the processor 601 is used to control the overall operation of the electronic device 600, so as to complete all or part of the steps in the above-mentioned vehicle control method.
  • the memory 602 is used to store various types of data to support the operation of the electronic device 600 , such data may include instructions for any application or method operating on the electronic device 600 , as well as application-related data.
  • the memory 602 can be implemented by any type of volatile or non-volatile storage device or their combination, such as Static Random Access Memory (Static Random Access Memory) Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), Erasable Programmable Read-Only Memory (Erasable Programmable Read-Only Memory, referred to as EPROM), Programmable Read-Only Memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • SRAM Static Random Access Memory
  • EEPROM Electrically erasable programmable read-only memory
  • EPROM Erasable Programmable Read-Only Memory
  • PROM Programmable Read-Only Memory
  • Read-Only Memory referred to as ROM
  • magnetic memory flash memory
  • flash memory magnetic disk or optical disk.
  • the corresponding communication component 604 may include: a Wi-Fi module, a Bluetooth module, an NFC module and the like.
  • the electronic device 600 may be integrated with one or more Application Specific Integrated Circuits (Application Specific Integrated Circuit, referred to as ASIC), digital signal processor (Digital Signal Processor (DSP for short), Digital Signal Processing Device (DSPD for short), Programmable Logic Device (PLD for short), Field Programmable Gate Array (Field Programmable Gate Array, FPGA for short), control implemented by a microcontroller, a microcontroller, a microprocessor or other electronic components, and is used to execute the above-mentioned vehicle control method.
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal Processor
  • DSPD Digital Signal Processing Device
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • a computer-readable storage medium including program instructions is also provided, and the program instructions implement the steps of the above-mentioned vehicle control method when executed by a processor.
  • the computer-readable storage medium can be the above-mentioned memory 602 including program instructions, and the above-mentioned program instructions can be executed by the processor 601 of the electronic device 600 to implement the above-mentioned vehicle control method.
  • a computer program product comprising a computer program executable by a programmable device, the computer program having a function for performing the above-mentioned The code section of the vehicle control method.
  • FIG. 7 is a vehicle 100 provided by the present application. As shown in FIG. 7 , the vehicle 100 includes the above-mentioned electronic device 600 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

一种车辆控制方法、存储介质和电子设备,该方法包括:获取车辆的发动机转速及发动机的最高转速;在发动机转速与最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定发动机转速与最高转速的差值所在的目标转速差值范围;确定目标转速差值范围对应的电机扭矩系数,不同的预设转速差值范围对应不同的电机扭矩系数;根据目标转速差值范围对应的电机扭矩系数调整车辆电机的目标输出扭矩,以降低目标输出扭矩,避免了发动机的实际转速超过发动机能承受的最高转速,有效地保护了发动机,有利于延长发动机的使用寿命,提升了用户的体验感。

Description

车辆控制方法、存储介质和电子设备
本申请要求于2021年09月30日在中国专利局提交的、申请号为202111164068.X、发明名称为“车辆控制的方法、装置、存储介质、电子设备和车辆”的中国专利申请的优先权。
技术领域
本申请涉及车辆控制技术领域,具体涉及车辆控制方法、存储介质和电子设备。
背景技术
车辆的发动机在硬件设计的时候会定义发动机最高转速限制,即发动机能承受的最高转速,如果发动机在高于该最高转速的情况下继续工作,会对发动机硬件使用寿命造成一定影响。
现有技术中,在发动机转速大于或者等于预设转速阈值的情况下,车辆会执行主动断油保护策略,即根据发动机的实际转速限制甚至切断对发动机供油,以便降低发动机的转速。
但是,在驾驶员踩踏油门踏板的程度较大的情况下,车辆即使执行了发动机的主动断油保护策略,发动机转速也可能一直上冲,从而影响发动机的寿命。
技术问题
本申请实施例的目的之一在于:提供一种车辆控制方法、存储介质和电子设备。
技术解决方案
本申请实施例采用的技术方案是:
第一方面,提供了一种车辆控制方法,包括:
获取车辆的发动机转速及发动机的最高转速;
在所述发动机转速与所述最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定所述发动机转速与所述最高转速的差值所在的目标转速差值范围;
确定所述目标转速差值范围对应的电机扭矩系数,不同的预设转速差值范围对应不同的电机扭矩系数;
根据所述目标转速差值范围对应的电机扭矩系数调整所述车辆电机的目标输出扭矩,以降低所述目标输出扭矩。
在一个实施例中,所述在所述发动机转速与所述最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定所述发动机转速与所述最高转速的差值所在的目标转速差值范围,包括:
在所述最高转速减去所述发动机转速得到的差值小于或等于第一预设转速阈值,或者,所述发动机转速减去所述最高转速得到的差值大于或等于第二预设转速阈值的情况下,多个预设转速差值范围中确定所述发动机转速与所述最高转速的差值所在的目标转速差值范围。
在一个实施例中,在所述发动机转速小于所述最高转速的情况下,所述预设转速差值范围的区间随着所述发动机转速的提高而接近零值。
在一个实施例中,所述电机扭矩系数随着所述预设转速差值范围的区间接近零值而减小。
在一个实施例中,在所述发动机转速大于或者等于所述最高转速的情况下,所述发动机转速与所述最高转速的差值所在的转速差值范围对应的电机扭矩系数为零。
在一个实施例中,所述目标输出扭矩包括所述电机的最大输出扭矩,或者,所述电机的分配扭矩。
在一个实施例中,在所述发动机转速与所述最高转速的差值满足预设条件的情况下还包括:
控制所述发动机进入怠速状态。
在一个实施例中,在所述发动机转速与所述最高转速的差值满足预设条件的情况下还包括:
发出告警信息,所述告警信息用于指示所述发动机转速异常。
第二方面,提供了一种计算机可读存储介质,其上存储有计算机程序,该程序被处理器执行时实现第一方面中任一项所述的车辆控制方法。
第三方面,提供了一种电子设备,包括:
存储器,其上存储有计算机程序;
处理器,用于执行所述存储器中的所述计算机程序,以实现第一方面中任一项所述的车辆控制方法。
有益效果
通过采用该技术方案,在发动机的转速与最高转速的差值满足预设条件的情况下,根据所述差值调整电机的输出扭矩,从而限制车辆轴速的提高,以避免发动机的转速被带动提高,这样,避免了发动机的实际转速超过发动机能承受的最高转速,有效地保护了发动机,有利于延长发动机的使用寿命,提升了用户的体验感。
本申请实施例提供的第二方面和第三方面的有益效果与上述第一方面的有益效果相同,请参照上述第一方面的有益效果。
附图说明
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其它的附图。
图1是根据一示例性实施例示出的一种车辆控制方法流程图;
图2是根据又一示例性实施例示出的一种车辆控制方法流程图;
图3是根据再一示例性实施例示出的一种车辆控制方法流程图;
图4是根据一示例性实施例示出的一种车辆控制装置框图;
图5是根据又一示例性实施例示出的一种车辆控制装置框图;
图6是根据一示例性实施例示出的一种电子设备的框图;
图7是根据一示例性实施例示出的一种车辆的框图。
本发明的实施方式
为了使本申请的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本申请,并不用于限定本申请。
术语“第一”、“第二”仅用于便于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明技术特征的数量。“多个”的含义是两个或两个以上,除非另有明确具体的限定。
首先对本申请的应用场景进行说明,本申请可以应用于车辆控制的场景中,在该场景下,车辆的发动机处于高速运转中,如果不加以限制,会导致发动机的转速很可能超过发动机所能承受的最高转速,这样就会对发动机的硬件造成一定损伤,影响发动机的使用寿命。
现有技术中为了避免发动机的转速超过其所能承受的最高转速,会采用一些方法进行限制,例如主动断油保护策略,该策略会根据发动机的实际转速限制甚至切断对发动机的供油,以降低发动机的转速。
但混动车辆可能发生如下情况,搭载P2混动架构或P2P4混动架构的车辆,在车辆的实际行驶过程中,如果驾驶员要求的驱动扭矩较高,驾驶员踩下较大程度的油门踏板,但变速器一直不换挡,会导致车辆电机的输出扭矩增大,继而带动发动机的转速也变大,导致限制甚至切断发动机的供油之后仍会出现发动机转速超过最高转速。
为了解决上述问题,本申请提供了一种车辆控制方法,在发动机转速与最高转速的差值满足预设条件的情况下,根据发动机的转速与最高转速的差值限制电机的输出扭矩,保证了发动机不会被拖动导致转速超过最高转速。
下面结合具体实施例对本申请进行说明。
图1为本申请实施例提供的一种车辆控制方法,如图1所示,车辆控制方法包括:
S101、获取车辆的发动机转速及发动机的最高转速。
其中,该发动机转速可以通过转速传感器获取,该转速传感器可以设置在车辆的曲轴位置,该发动机的最高转速可以是该发动机在不影响自身使用寿命的情况下,所能承受的最高转速,该发动机的最高转速可以通过该发动机获取。
S102、在该发动机转速与该最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定该发动机转速与该最高转速的差值所在的目标转速差值范围。
预设条件为表征发动机转速有超过最高转速的趋势。其中,在该发动机转速与该最高转速的差值为该最高转速减去该发动机转速得到的差值的情况下,该预设条件包括该最高转速减去该发动机转速得到的差值小于或者等于第一预设转速阈值;在该发动机转速与该最高转速的差值为该发动机转速减去该最高转速得到的差值的情况下,该预设条件包括该发动机转速减去该最高转速得到的差值大于或者等于第二预设转速阈值。
以该发动机转速与该最高转速的差值为该最高转速减去该发动机转速得到的差值为例,对步骤S102进行介绍。预设转速差阈值可以是表征该发动机的转速接近该发动机可承受的最高转速的警戒差值,在该最高转速减去该发动机转速得到的差值小于或者等于预设转速差阈值的情况下,为了防止该发动机的转速继续上升超过该发动机可承受的最高转速,可以从多个预设转速差值范围中确定该发动机当前转速所在的目标转速差值范围,然后根据该目标转速差值范围执行S103-S104的步骤,该多个预设转速差值范围用于表征该发动机转速所处的多个阶段。
在一种可能的实现方式中,当该发动机处于无故障状态时,该预设转速差阈值可以是300rpm。
示例地,该多个预设转速差值范围可以是(300rpm,200rpm)、(200rpm,100rpm)、(100rpm,50rpm)、(50rpm,0rpm)以及0rpm以下。在该最高转速减去该发动机转速得到的差值小于或者等于300rpm且大于200rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(300rpm,200rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于200rpm且大于100rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(200rpm,100rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于100rpm且大于50rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(100rpm,50rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于50rpm且大于0rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(50rpm,0rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于0rpm的情况下,确定该发动机的转速处于最高转速以上。
在另一种可能的实现方式中,当该发动机处于故障状态时,为了防止进一步导致该发动机故障严重,该预设转速差阈值可以进行适当提高,例如,预设转速差阈值可以是500rpm。
示例地,该多个预设转速差范围可以是(500rpm,300rpm)、(300rpm,200rpm)、(200rpm,100rpm)、(100rpm,50rpm)、(50rpm,0rpm)以及0rpm以下。在该最高转速减去该发动机转速得到的差值小于或者等于500rpm且大于300rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(500rpm,300rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于300rpm且大于200rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(300rpm,200rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于200rpm且大于100rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(200rpm,100rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于100rpm且大于50rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(100rpm,50rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于50rpm且大于0rpm的情况下,确定该最高转速减去该发动机转速得到的差值处于(50rpm,0rpm)的目标转速差值范围内;在该最高转速减去该发动机转速得到的差值小于或者等于0rpm的情况下,确定该发动机的转速处于最高转速以上。
在该发动机转速与该最高转速的该差值为该发动机转速减去该最高转速得到的差值的情况下,与上述实施例类似,此处不再赘述。
需要说明的是,上述最高转速、预设转速差阈值以及多个预设转速差值范围可以根据不同发动机的类型和型号或者实验值进行预先设置,此处仅用于举例说明,并不用作限制本申请。
S103、确定该目标转速差值范围对应的电机扭矩系数。
其中,不同的预设转速差值范围对应不同的电机扭矩系数,该电机扭矩系数用于调整电机的输出扭矩,可以通过预设系数对应关系,获取该发动机转速对应的电机扭矩系数,该预设系数对应关系包括不同预设转速差值范围对应的电机扭矩系数。
其中,该预设转速差值范围的区间在该发动机转速小于该最高转速的情况下,该预设转速差值范围的区间随着该发动机转速的提高而接近零值;该电机扭矩系数随着该预设转速差值范围的区间接近零值而减小。若第一预设转速差值范围对应的电机扭矩系数为零,该第一预设转速差值范围为该发动机转速大于或者等于该最高转速的情况下,该发动机转速与该最高转速的差值所在的转速差值范围。
示例地,以该差值为该最高转速减去该发动机转速得到的差值为例,在一种可能的实现方式中,该发动机处于无故障状态,该预设系数对应关系可以如表1所示,
预设转速差值范围 (300rpm,200rpm) (200rpm,100rpm) (100rpm,50rpm) (50rpm,0rpm) 0rpm及以下
电机扭矩系数 0.8 0.5 0.3 0.1 0
表1
在另一种可能的实现方式中,该发动机处于故障状态,该预设系数对应关系可以如表2所示,
预设转速差值范围 (500rpm,300rpm) (300rpm,200rpm) (200rpm,100rpm) (100rpm,50rpm) (50rpm,0rpm) 0rpm及以下
电机扭矩系数 0.8 0.6 0.4 0.2 0.1 0
表2
通过上述表1和/或表2可知,在该最高转速减去该发动机转速得到的差值小于或者等于该预设转速差阈值的情况下,不同的预设转速差值范围对应的电机扭矩系数不同,该电机扭矩系数呈现梯度下降的趋势,越接近该发动机可承受的最高转速,则该电机扭矩系数越小。在该发动机转速大于或者等于该发动机可承受的最高转速的情况下,停止该电机的输出扭矩。
在该差值为该发动机转速减去该最高转速得到的差值的情况下,参考上述实施例,此处不再赘述。
S104、根据该目标转速差值范围对应的电机扭矩系数调整该车辆电机的目标输出扭矩,以降低该目标输出扭矩。
其中,该目标输出扭矩包括该电机的最大输出扭矩;或者,该电机的分配扭矩。其中,该电机的分配扭矩表征该车辆指示该电机的输出扭矩,例如,该分配扭矩可以是在用户踩下油门踏板后,该车辆根据油门踏板的开合度、车速以及驾驶模式,指示该电机对外输出的扭矩,以便车辆可以快速响应驾驶员的驱动意图。
在一种可能的实现方式中,在该目标输出扭矩包括该电机的最大输出扭矩的情况下,可以将该电机扭矩系数与该电机的最大输出扭矩的乘积,作为调整后的最大输出扭矩。
其中,在该发动机转速与该最高转速的差值满足预设条件,且该发动机的转速小于该最高转速的情况下,该电机扭矩系数随着发动机的转速上升而呈梯度下降,进而逐步加大对该电机的最大输出扭矩的限制,避免该发动机转速被带动而继续上升。
在另一种可能的实现方式中,在该目标输出扭矩包括该电机的分配扭矩的情况下,可以将该电机扭矩系数与该电机的分配扭矩的乘积,作为调整后的输出扭矩。
根据该发动机转速获取对应的电机扭矩系数后,将该电机扭矩系数与该电机的分配扭矩的乘积作为该电机调整后的分配扭矩,降低对该电机实际要求的输出扭矩,避免该发动机转速被带动而继续上升。
采用上述方法,通过在该发动机转速与该最高转速的差值满足预设条件的情况下,根据该发动机的转速对该电机输出扭矩进行不同程度的限制,逐步加大对该电机的输出扭矩的控制,最终控制该电机的输出扭矩不会造成该发动机的转速进一步提升,从而保证该发动机的硬件不会受损,有利于延长该发动机的使用寿命,提升了用户的体验感。
在本申请另一实施例中,在限制该电机的输出扭矩的情况下,还可以控制发动机的状态,如图2所示,在图1所示步骤的基础上,本申请实施例还可以包括如下步骤:
S105、控制该发动机进入怠速状态。
本步骤中,在对该电机输出扭矩进行限制的情况下,进一步为了防止该发动机可能出现的转速提高的情况,如在该车辆的主动断油保护策略失灵的情况下,控制该发动机进入怠速状态,以便该发动机不再接收车辆发送的扭矩输出需求,从而可以将转速控制在一个较低的程度。
这样,可以进一步地保证将该发动机的转速控制在该发送机可承受的最高转速范围内,避免了一些特殊情况下可能出现的发动机转速超过该最高转速的情况,有利于加强对发动机转速的限制。
在图2所示步骤的基础上,如图3所示,在该发动机的转速超过预设转速阈值的情况下,还可以发出告警信息:
S106、发出告警信息。
该告警信息用于指示该发动机转速异常。
这样,可以在该发动机转速与该最高转速的差值满足预设条件的情况下,对驾驶员进行告警,以便提示驾驶员进行换挡或者减小油门踏板的踩踏程度。
图4为本申请实施例提供的一种车辆控制装置,如图4所示,车辆控制装置包括:
获取模块401,用于获取车辆的发动机转速及发动机的最高转速;
确定模块402,用于在该发动机转速与该最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定该发动机转速与该最高转速的差值所在的目标转速差值范围;
查询模块403,用于确定该目标转速差值范围对应的电机扭矩系数,不同的预设转速差值范围对应不同的电机扭矩系数;
控制模块404,用于根据该目标转速差值范围对应的电机扭矩系数调整该车辆电机的目标输出扭矩,以降低该目标输出扭矩,该目标输出扭矩包括该电机的最大输出扭矩;或者,该电机的分配扭矩。
该查询模块403,用于通过预设系数对应关系,获取该发动机转速对应的电机扭矩系数,该预设系数对应关系包括不同预设转速差值范围对应的电机扭矩系数。
该预设转速差值范围的区间在该发动机转速小于该最高转速的情况下,随着该发动机转速的提高而接近零值;该电机扭矩系数对应于该预设转速差值范围,随着该预设转速差值范围的区间接近零值而减小;第一预设转速差值范围对应的电机扭矩系数为零,该第一预设转速差值范围为该发动机转速大于或者等于该最高转速的情况下,该发动机转速与该最高转速的差值所在的转速差值范围。
该控制模块404,还用于控制该发动机进入怠速状态。
通过在该发动机转速与该最高转速的差值满足预设条件的情况下,根据该发动机的转速与该最高转速的差值对该电机输出扭矩进行不同程度的限制,逐步加大对该电机的输出扭矩的控制,最终控制该电机的输出扭矩不会造成该发动机的转速进一步提升,此外,控制该发动机处于怠速状态,避免了一些特殊情况下可能出现的发动机转速超过该最高转速的情况,从而保证该发动机的硬件不会受损,有利于延长该发动机的使用寿命,提升了用户的体验感。
另外,在上述装置的基础上,如图5所示,车辆控制装置还包括告警模块405,用于发出告警信息,该告警信息用于指示该发动机转速异常。
这样,可以在所述发动机转速与所述最高转速的差值满足预设条件的情况下,对驾驶员进行告警,以便提示驾驶员进行换挡或者减小油门踏板的踩踏程度,有利于进一步避免影响发动机使用寿命。
关于上述实施例中的装置,其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述,此处将不做详细阐述说明。
图6是根据一示例性实施例示出的一种电子设备600的框图。如图6所示,该电子设备600可以包括:处理器601,存储器602。该电子设备600还可以包括输入/输出(I/O)接口603,以及通信组件604中的一者或多者。
其中,处理器601用于控制该电子设备600的整体操作,以完成上述的车辆控制方法中的全部或部分步骤。存储器602用于存储各种类型的数据以支持在该电子设备600的操作,这些数据例如可以包括用于在该电子设备600上操作的任何应用程序或方法的指令,以及应用程序相关的数据。该存储器602可以由任何类型的易失性或非易失性存储设备或者它们的组合实现,例如静态随机存取存储器(Static Random Access Memory,简称SRAM),电可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory,简称EEPROM),可擦除可编程只读存储器(Erasable Programmable Read-Only Memory,简称EPROM),可编程只读存储器(Programmable Read-Only Memory,简称PROM),只读存储器(Read-Only Memory,简称ROM),磁存储器,快闪存储器,磁盘或光盘。通信组件604用于该电子设备600与其他设备之间进行有线或无线通信。无线通信,例如Wi-Fi,蓝牙,近场通信(Near Field Communication,简称NFC),2G、3G、4G、NB-IOT、eMTC、或其他5G等等,或它们中的一种或几种的组合,在此不做限定。因此相应的该通信组件604可以包括:Wi-Fi模块,蓝牙模块,NFC模块等等。
在一示例性实施例中,电子设备600可以被一个或多个应用专用集成电路(Application Specific Integrated Circuit,简称ASIC)、数字信号处理器(Digital Signal Processor,简称DSP)、数字信号处理设备(Digital Signal Processing Device,简称DSPD)、可编程逻辑器件(Programmable Logic Device,简称PLD)、现场可编程门阵列(Field Programmable Gate Array,简称FPGA)、控制器、微控制器、微处理器或其他电子元件实现,用于执行上述的车辆控制方法。
在另一示例性实施例中,还提供了一种包括程序指令的计算机可读存储介质,该程序指令被处理器执行时实现上述的车辆控制方法的步骤。例如,该计算机可读存储介质可以为上述包括程序指令的存储器602,上述程序指令可由电子设备600的处理器601执行以完成上述的车辆控制方法。
在另一示例性实施例中,还提供一种计算机程序产品,该计算机程序产品包含能够由可编程的装置执行的计算机程序,该计算机程序具有当由该可编程的装置执行时用于执行上述的车辆控制方法的代码部分。
图7为本申请提供的一种车辆100,如图7所示,该车辆100包括上述电子设备600。
以上结合附图详细描述了本申请的优选实施方式,但是,本申请并不限于上述实施方式中的具体细节,在本申请的技术构思范围内,可以对本申请的技术方案进行多种简单变型,这些简单变型均属于本申请的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本申请对各种可能的组合方式不再另行说明。
以上仅为本申请的可选实施例而已,并不用于限制本申请。对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的权利要求范围之内。

Claims (10)

  1. 一种车辆控制方法,其特征在于,包括:
    获取车辆的发动机转速及发动机的最高转速;
    在所述发动机转速与所述最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定所述发动机转速与所述最高转速的差值所在的目标转速差值范围;
    确定所述目标转速差值范围对应的电机扭矩系数,不同的预设转速差值范围对应不同的电机扭矩系数;
    根据所述目标转速差值范围对应的电机扭矩系数调整所述车辆电机的目标输出扭矩,以降低所述目标输出扭矩。
  2. 根据权利要求1所述的车辆控制方法,其特征在于,所述在所述发动机转速与所述最高转速的差值满足预设条件的情况下,从多个预设转速差值范围中确定所述发动机转速与所述最高转速的差值所在的目标转速差值范围,包括:
    在所述最高转速减去所述发动机转速得到的差值小于或等于第一预设转速阈值,或者,所述发动机转速减去所述最高转速得到的差值大于或等于第二预设转速阈值的情况下,多个预设转速差值范围中确定所述发动机转速与所述最高转速的差值所在的目标转速差值范围。
  3. 根据权利要求1所述的车辆控制方法,其特征在于,在所述发动机转速小于所述最高转速的情况下,所述预设转速差值范围的区间随着所述发动机转速的提高而接近零值。
  4. 根据权利要求1所述的车辆控制方法,其特征在于,所述电机扭矩系数随着所述预设转速差值范围的区间接近零值而减小。
  5. 根据权利要求1所述的车辆控制方法,其特征在于,在所述发动机转速大于或者等于所述最高转速的情况下,所述发动机转速与所述最高转速的差值所在的转速差值范围对应的电机扭矩系数为零。
  6. 根据权利要求1所述的车辆控制方法,其特征在于,所述目标输出扭矩包括所述电机的最大输出扭矩,或者,所述电机的分配扭矩。
  7. 根据权利要求1所述的车辆控制方法,其特征在于,在所述发动机转速与所述最高转速的差值满足预设条件的情况下还包括:
    控制所述发动机进入怠速状态。
  8. 根据权利要求1-6任一项所述的车辆控制方法,其特征在于,在所述发动机转速与所述最高转速的差值满足预设条件的情况下还包括:
    发出告警信息,所述告警信息用于指示所述发动机转速异常。
  9. 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,该程序被处理器执行时实现权利要求1-8所述方法的步骤。
  10. 一种电子设备,其特征在于,包括:
    存储器,其上存储有计算机程序;
    处理器,用于执行所述存储器中的所述计算机程序,以实现权利要求1-8中任一项所述方法的步骤。
PCT/CN2022/122518 2021-09-30 2022-09-29 车辆控制方法、存储介质和电子设备 WO2023051676A1 (zh)

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