WO2022078335A1 - 用于混动车辆的发动机清理方法、清理系统及混动车辆 - Google Patents

用于混动车辆的发动机清理方法、清理系统及混动车辆 Download PDF

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Publication number
WO2022078335A1
WO2022078335A1 PCT/CN2021/123316 CN2021123316W WO2022078335A1 WO 2022078335 A1 WO2022078335 A1 WO 2022078335A1 CN 2021123316 W CN2021123316 W CN 2021123316W WO 2022078335 A1 WO2022078335 A1 WO 2022078335A1
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Prior art keywords
engine
cleaning
instruction
hybrid vehicle
rotational speed
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PCT/CN2021/123316
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English (en)
French (fr)
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吴光耀
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比亚迪股份有限公司
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Publication of WO2022078335A1 publication Critical patent/WO2022078335A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/083—Safety, indicating, or supervising devices relating to maintenance, e.g. diagnostic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the present application relates to the technical field of vehicles, and in particular, to an engine cleaning method, a cleaning system and a hybrid vehicle for a hybrid vehicle.
  • the engine may inject fuel but fail to ignite successfully or burn insufficiently. After a certain period of time, part of the fuel will accumulate in the engine cylinders, and even flooding may occur in severe cases. Phenomenon. This phenomenon will cause rough combustion when the engine is started, which is not conducive to the operation control of the engine, and also affects the life of the engine.
  • the purpose of the embodiments of the present application is to provide an engine cleaning method, a cleaning system and a hybrid vehicle for a hybrid vehicle, so as to solve one or more of the above technical problems.
  • an embodiment of the present application provides an engine cleaning method for a hybrid vehicle, the hybrid vehicle includes a motor and an engine, and the method includes: when the vehicle is in a parked state, executing a cleaning instruction, It includes controlling the motor to drive the engine to rotate according to a predetermined speed, allowing gas to flow into and out of the engine, and controlling the engine not to inject fuel.
  • the method further includes: when the vehicle is in a parked state and the accelerator pedal depth of the vehicle is greater than a first preset value and the brake pedal depth is greater than a second preset value, executing the cleanup instruction.
  • the method before executing the cleaning instruction, the method further includes: detecting whether the electric motor and the engine are faulty; and starting to execute the cleaning instruction if neither the electric motor nor the engine is faulty .
  • the method further includes: timing the execution of the cleaning instruction; and after the timing period reaches a preset cleaning period or after receiving a preset user instruction, stopping the execution of the cleaning instruction.
  • the method further includes: detecting the states of the electric motor and the engine; and an abnormality occurs in the state of either of the electric motor and the engine, or After receiving the preset user instruction, stop executing the cleaning instruction.
  • the method further includes: detecting the current speed of the engine; and revising the speed of the engine according to the current speed of the engine and the predetermined speed , so that the rotational speed of the engine is within the predetermined rotational speed range.
  • the predetermined rotational speed ranges from 300 rpm to 500 rpm.
  • the present application provides an engine cleaning system for a hybrid vehicle, the hybrid vehicle includes a motor and an engine, the system includes a control device for executing a cleaning instruction when the vehicle is in a parked state, wherein, executing the cleaning instruction by the control device includes: controlling the motor to drive the engine to rotate at a predetermined speed, allowing gas to flow into and out of the engine, and controlling the engine not to inject fuel.
  • control device is further configured to, when the vehicle is in a parking state, and the accelerator pedal depth of the vehicle is greater than a first preset value, and the brake pedal depth is greater than a second preset value, The cleanup instruction is executed.
  • control device before executing the cleaning instruction, is further configured to perform the following operations: detect whether the electric motor and the engine are faulty; and in the case that neither the electric motor nor the engine is faulty, start The cleanup instruction is executed.
  • control device is further configured to perform the following operations: time the execution of the cleaning instruction; and stop executing the cleaning instruction after the timing period reaches a preset cleaning period or after receiving a preset user instruction.
  • control device in the process of executing the cleaning instruction, is further configured to perform the following operations: detecting the state of the electric motor and the engine; If the status is abnormal, or after receiving a preset user command, stop executing the cleaning command.
  • control device is further configured to perform the following operations: detect the current speed of the engine; The rotational speed of the engine is corrected so that the rotational speed of the engine is within the predetermined rotational speed range.
  • the present application provides a hybrid vehicle provided with the engine cleaning system for a hybrid vehicle as described in any one of the above.
  • the present application provides a machine-readable storage medium, where instructions are stored on the machine-readable storage medium, and the instructions are used to cause a machine to execute the engine for a hybrid vehicle described in any one of the above-mentioned applications in the present application. cleanup method.
  • the motor is driven by the motor to rotate at a predetermined speed without fuel injection, and the air flowing through the engine is used to clean it, which has the advantages of simple structure and easy implementation.
  • FIG. 1 is a schematic flowchart 1 of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application
  • FIG. 2 is a second schematic flowchart of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application
  • FIG. 3 is a schematic flow chart 3 of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application
  • FIG. 4 is a fourth schematic flowchart of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart 5 of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application
  • FIG. 6 is a sixth schematic flowchart of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 7 is a seventh schematic flowchart of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart 8 of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 9 is a schematic flow chart 9 of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 10 is a structural block diagram of a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of an engine cleaning method for a hybrid vehicle provided by an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of an engine cleaning method for a hybrid vehicle provided by another embodiment of the present application.
  • the embodiment of the present application provides an engine cleaning method for a hybrid vehicle 100 , and the engine cleaning method is mainly applicable to the engine 20 provided on the hybrid vehicle 100 to clean residual fuel inside a cylinder of the engine 20 .
  • the engine cleaning method provided by the embodiment of the present application realizes the cleaning of the engine 20 by executing a corresponding cleaning instruction when the hybrid vehicle 100 is in a predetermined state.
  • the hybrid vehicle 100 is equipped with a motor 10 and an engine 20 at the same time.
  • the engine cleaning method provided by the embodiment of the present application includes:
  • executing the cleanup instruction includes:
  • the engine 20 can be cleaned with gas to take away the residual fuel inside the cylinder of the engine 20 .
  • the predetermined state of the hybrid vehicle 100 when cleaning the engine 20 is the parking state
  • the parking state may specifically be the state when the parking brake is activated and the vehicle gear is the parking gear (ie, the P gear), or the parking The state when the car brake is activated and the vehicle gear is neutral (ie, N gear).
  • the depth of the accelerator pedal and the depth of the brake pedal may also be used as one of the determinations of whether the vehicle satisfies the clearing condition.
  • the engine cleaning method provided by the embodiment of the present application further includes:
  • the parking brake may be a manual parking device or an electric parking device (ie, an electronic parking brake system EPB).
  • an electric parking device ie, an electronic parking brake system EPB.
  • the first preset value and the second preset value can be set by themselves according to actual needs.
  • the first preset value can be 80% of the total depth of the accelerator pedal
  • the second preset value can be 80% of the total depth of the brake pedal. 30%.
  • the solution provided by this embodiment of the present application proposes that the motor 10 drives the engine 20 to rotate at a predetermined speed without fuel injection, and uses the air flowing through the engine 20 to clean it, which has the advantages of simple structure and easy implementation.
  • the starter can be eliminated in the hybrid vehicle 100 to simplify the structure of the hybrid vehicle 100 and reduce the product cost.
  • the engine cleaning method for the hybrid vehicle 100 provided by this embodiment of the present application can also be executed in the following two arbitrary manners:
  • the user is reminded whether the engine 20 needs to be cleaned after certain conditions are met, as shown in FIG. 3 : S12.
  • the cumulative running time of the hybrid vehicle 100 reaches the preset reminder time, when the vehicle starts or stops , prompts whether the engine 20 needs to be cleaned, and starts to execute the cleaning command after receiving the command to confirm the cleaning of the engine 20 .
  • the user when the user wants to clean the engine 20 by himself, he inputs an instruction to clean the engine 20 to the vehicle, as shown in FIG. 4 : S13 , the instruction to clean the engine 20 is received at any time and the hybrid vehicle 100 is in the state When in the parked state, start the cleaning command.
  • the engine cleaning method provided by the embodiment of the present application further includes:
  • the engine cleaning method provided by the embodiment of the present application further includes:
  • the engine cleaning method provided by the embodiment of the present application further includes:
  • the preset user instruction corresponds to an instruction input by the user to stop and clean the engine 20 .
  • the user can input the instruction about stopping and cleaning the engine 20 in any of the following ways: adjusting the vehicle gear to other gears than N gear and P gear, controlling the parking brake to stop working, adjusting the vehicle speed to not zero and the accelerator Pedal depth or brake pedal depth does not reach the corresponding set threshold, etc.
  • the set threshold of the accelerator pedal depth may be 80% of the total depth of the accelerator pedal, and the set threshold of the brake pedal depth may be 30% of the total depth of the brake pedal.
  • the above-mentioned setting threshold is not a fixed value, and the user can set it by himself according to vehicle parameters and actual experience.
  • the faults of the motor 10 provided in the embodiment of the present application include: overvoltage fault, undervoltage fault, overcurrent fault, resolver fault, IPB fault and phase loss fault, etc.
  • the faults of the engine 20 include: the engine 20 cannot be started, the speed is out of control and the engine 20 is overheated, etc., among which, the reasons that cause the engine 20 to fail to start include but are not limited to sensor failure, spark plug failure, low oil pump pressure, and throttle valve failure.
  • the engine cleaning method for the hybrid vehicle 100 may stop cleaning the engine 20 when any of the following situations occurs:
  • the second is to count the time when starting to execute the cleaning instruction, and stop cleaning the engine 20 when the timing reaches the preset cleaning time;
  • the third method is to stop cleaning the engine 20 when receiving an instruction about stopping cleaning input from the user.
  • the engine 20 may not operate at a constant rotational speed, that is, the actual rotational speed of the engine 20 is controlled to fluctuate up and down near the set rotational speed value.
  • the engine cleaning method provided by the embodiments of the present application may further include:
  • the range of the predetermined rotational speed is 300 rpm to 500 rpm, so any value from 300 rpm to 500 rpm can be selected as the predetermined rotational speed, and a fluctuation value is set on this basis, so that the engine 20 Shake within the range of the predetermined rotational speed ⁇ fluctuation value.
  • the fluctuation value is selected as 100 rpm, so the rotational speed of the engine 20 can fluctuate in the range of 300 rpm to 500 rpm.
  • the engine cleaning method provided by the embodiment of the present application adopts the closed-loop control principle to continuously correct the rotational speed of the engine 20, so that the engine 20 is always in a controllable state, which can make the cleaning of the residual fuel of the engine 20 have a good effect, and the entire cleaning process can be performed.
  • the stability of the vehicle is good, and the controllability of the cleaning process is high.
  • the engine cleaning method for the hybrid vehicle 100 provided by the embodiment of the present application adopts the motor 10 to drive the engine 20 to rotate, and the control accuracy of the torque and speed control of the motor 10 is very high, so the cylinder speed of the engine 20 can be cleaned. precise control.
  • FIG. 11 is a schematic flowchart of an engine cleaning method for a hybrid vehicle 100 provided by an embodiment of the present application.
  • the engine cleaning method for the hybrid vehicle 100 includes:
  • the engine 20 cylinder clearing condition may include: whether the vehicle state is a parking state, and whether the motor 10 and the engine 20 are faulty;
  • start the cylinder cleaning which specifically includes:
  • FIG. 12 is a schematic flowchart of an engine cleaning method for a hybrid vehicle 100 according to another specific embodiment of the present application.
  • the engine cleaning method for the hybrid vehicle 100 includes:
  • the engine clearing condition may include: whether the vehicle state is a parking state, and whether the motor 10 and the engine 20 are faulty;
  • start the cleaning including controlling the engine 20 to prohibit fuel injection, and starting timing, and controlling the motor 10 to drive the engine 20 to rotate at a predetermined rotational speed (which may fluctuate up and down the predetermined rotational speed value);
  • the state of the motor 10 and the engine 20 is detected, and based on the closed-loop control, the rotational speed of the engine 20 is maintained within the range of the set rotational speed ⁇ the fluctuating rotational speed;
  • the timing When the timing reaches the preset time, the timing is stopped, the cylinder cleaning is over, and fuel injection is allowed. or
  • the cylinder purge is stopped, and the engine 20 is allowed to inject fuel.
  • the above step of detecting whether the timing duration reaches the preset duration is performed.
  • the embodiment of the present application further provides an engine 20 cleaning system for the hybrid vehicle 100.
  • the system includes a control device, which is mainly used when the vehicle is in a parked state.
  • the cleaning instruction is executed to realize the cleaning of the remaining fuel in the engine 20 .
  • the parking state may specifically be the state when the parking brake is in the activated state and in the parking gear (ie, the P gear), or the state when the parking brake is in the activated state and in the neutral gear (ie, the N gear).
  • the parking brake can be a manual parking device or an electric parking device (ie, an electronic parking brake system EPB).
  • the hybrid vehicle 100 is confirmed to meet the cleaning condition only when the hybrid vehicle 100 is in a parking state and the following specific states are met: the accelerator pedal depth is greater than a first preset value, and the brake pedal depth is greater than a second preset value .
  • the cleaning instruction executed by the control device specifically includes: controlling the motor 10 to drive the engine 20 to rotate at a predetermined speed, so that gas flows into and out of the engine 20, and controlling the engine 20 not to inject fuel.
  • the motor 10 is controlled by the motor controller
  • the engine 20 is controlled by the engine control unit
  • the control device can also
  • the specific operations of the cleaning command are divided into motor action commands and engine action commands, which are respectively sent to the motor controller and the engine control unit.
  • the vehicle control unit of the hybrid vehicle 100 communicates with the motor controller and the engine control unit, so that the control device can send the corresponding cleaning instruction to the vehicle control unit, or directly from the vehicle
  • the control unit acts as a control device to simplify the vehicle structure and reduce costs.
  • control device before executing the cleaning instruction, is further configured to perform the following operations: detect whether the motor 10 and the engine 20 are faulty; and start to perform the cleaning when neither the motor 10 nor the engine 20 is faulty instruction.
  • the cleaning instruction before executing the cleaning instruction, it can also detect whether the parking brake is in the activated state, whether the vehicle speed is 0, whether the depth of the accelerator pedal is greater than 80% of the total depth of the accelerator pedal, and whether the depth of the brake pedal is greater than the brake pedal depth. 30% of the total depth of the moving pedal, and when all the above conditions are met, the cleaning command can be executed.
  • control device after starting to perform cleaning, is further configured to perform the following operations: time the execution of the cleaning instruction; and stop after the timing period reaches a preset cleaning period or a preset user instruction is received Execute cleanup instructions.
  • the timing operation may be implemented by components such as a timer or a time relay, and may also be implemented by a control device.
  • control device in the process of executing the cleaning instruction, is further configured to perform the following operations: detect the states of the motor 10 and the engine 20; Or after receiving the preset user instruction, stop executing the cleaning instruction.
  • control device in the process of performing the cleaning, is further configured to perform the following operations: detect the current rotational speed of the engine 20; and correct the rotational speed of the engine 20 according to the current rotational speed and the predetermined rotational speed of the engine 20 , so that the rotational speed of the engine 20 is within a predetermined rotational speed range.
  • the embodiments of the present application further provide a hybrid vehicle 100, and the hybrid vehicle 100 is provided with the engine cleaning system for the hybrid vehicle 100 provided by any of the above embodiments of the present application.
  • the motor 10 of the hybrid vehicle 100 may be a BSG belt drive starter motor or an ISG integrated starter motor, and the control device used in the engine cleaning system of the hybrid vehicle 100 may control the BSG belt
  • the transmission starter motor or the ISG integrated starter motor drives the engine 20 to act according to a predetermined rotation speed, so as to clean the residual fuel in the engine 20 .
  • Embodiments of the present application further provide a machine-readable storage medium, where instructions are stored on the machine-readable storage medium, and the instructions are used to cause a machine to execute the engine cleaning method for a hybrid vehicle 100 provided by any of the foregoing embodiments of the present application .
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.
  • a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
  • processors CPUs
  • input/output interfaces network interfaces
  • memory volatile and non-volatile memory
  • Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory in the form of, for example, read only memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
  • RAM random access memory
  • ROM read only memory
  • flash RAM flash memory
  • Computer-readable media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology.
  • Information may be computer readable instructions, data structures, modules of programs, or other data.
  • Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
  • computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

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  • 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)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

一种用于混动车辆（100）的发动机（20）清理方法、清理系统及混动车辆（100）。混动车辆（100）包括电机（10）和发动机（20），清理方法包括：在混动车辆（100）处于停车状态的情况下，执行清理指令，控制电机（10）带动发动机（20）按照预定转速转动，使气体流入和流出发动机（20），并控制发动机（20）不喷油。

Description

用于混动车辆的发动机清理方法、清理系统及混动车辆
相关申请的交叉引用
本申请基于申请号为202011097030.0、申请日为2020年10月14日的中国专利申请《用于混动车辆的发动机清理方法、清理系统及混动车辆》，并要求上述中国专利申请的优先权，上述中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及车辆技术领域，具体地涉及一种用于混动车辆的发动机清理方法、清理系统及混动车辆。
背景技术
对于混动车辆来说，在部分工况下，发动机会存在喷油但未能点火成功或者燃烧不充分的现象，持续一定时间后，发动机气缸内会积累部分燃油，严重时甚至会出现淹缸现象。该现象会导致后会出现发动机启动时燃烧粗暴等情况，不利于发动机的运行控制，同时也会影响发动机寿命。
发明内容
本申请实施例的目的是提供一种用于混动车辆的发动机清理方法、清理系统及混动车辆，用于解决上述技术问题中的一者或多者。
为了实现上述目的，本申请实施例提供一种用于混动车辆的发动机清理方法，所述混动车辆包括电机和发动机，所述方法包括：在车辆处于停车状态的情况下，执行清理指令，包括控制所述电机带动所述发动机按照预定转速转动，使气体流入和流出所述发动机，并控制所述发动机不喷油。
在一些实施例中，所述方法还包括：在所述车辆处于停车状态，且所述车辆的油门踏板深度大于第一预设值，制动踏板深度大于第二预设值的情况下，执行所述清理指令。
在一些实施例中，在执行所述清理指令之前，所述方法还包括：检测所述电机和发动机是否有故障；以及在所述电机和发动机均没有故障的情况下，开始执行所述清理指令。
在一些实施例中，所述方法还包括：对所述执行清理指令进行计时；以及在计时时长达到预设清理时长或者接收到预设用户指令后，停止执行清理指令。
在一些实施例中，在执行清理指令的过程中，所述方法还包括：检测所述电机和所述发动机的状态；以及在所述电机和所述发动机中的任一者状态出现异常，或者接收到预设用户指令后，停止执行清理指令。
在一些实施例中，在执行清理指令的过程中，所述方法还包括：检测所述发动机的当前转速；以及根据所述发动机的当前转速和所述预定转速，对所述发动机的转速进行修正，以使得所述发动机的转速处于所述预定转速的范围内。
在一些实施例中，所述预定转速的范围是300转/分至500转/分。
另一方面，本申请提供一种用于混动车辆的发动机清理系统，所述混动车辆包括电机和发动机，所述系统包括控制装置，用于在车辆处于停车状态的情况下执行清理指令，其中，所述控制装置执行所述清理指令包括：控制所述电机带动所述发动机按照预定转速转动，使气体流入和流出所述发动机，并控制所述发动机不喷油。
在一些实施例中，所述控制装置还用于在所述车辆处于停车状态，且所述车辆的油门踏板深度大于第一预设值，制动踏板深度大于第二预设值的情况下，执行所述清理指令。
在一些实施例中，在执行所述清理指令之前，所述控制装置还用于执行以下操作：检测所述电机和发动机是否有故障；以及在所述电机和发动机均没有故障的情况下，开始执行所述清理指令。
在一些实施例中，所述控制装置还用于执行以下操作：对所述执行清理指令进行计时；以及在计时时长达到预设清理时长或者接收到预设用户指令后，停止执行清理指令。
在一些实施例中，在执行清理指令的过程中，所述控制装置还用于执行以下操作：检测所述电机和所述发动机的状态；以及在所述电机和所述发动机中的任一者状态出现异常，或者接收到预设用户指令后，停止执行清理指令。
在一些实施例中，在执行清理执行的过程中，所述控制装置还用于执行以下操作：检测所述发动机的当前转速；以及根据所述发动机的当前转速和所述预定转速，对所述发动机的转速进行修正，以使得所述发动机的转速处于所述预定转速的范围内。
另一方面，本申请提供一种混动车辆，所述混动车辆设置有如上述中任一项所述的用于混动车辆的发动机清理系统。
另一方面，本申请提供一种机器可读存储介质，该机器可读存储介质上存储有指令，该指令用于使得机器执行本申请上述中任一项所述的用于混动车辆的发动机清理方法。
通过上述技术方案，由电机带动发动机在没有喷油的情况下按照预定转速转动，利用流经发动机的空气对其进行清理，具有结构简单且易于实现的优点。
本申请实施例的其它特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本申请实施例的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本申请实施例，但并不构成对本申请实施例的限制。在附图中：
图1是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图一；
图2是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图二；
图3是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图三；
图4是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图四；
图5是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图五；
图6是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图六；
图7是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图七；
图8是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图八；
图9是本申请实施例提供的用于混动车辆的发动机清理方法的流程示意图九；
图10是本申请实施例提供的混动车辆的结构框图；
图11是本申请的一实施例提供的用于混动车辆的发动机清理方法的流程示意图；
图12是本申请的另一实施例提供的用于混动车辆的发动机清理方法的流程示意图。
具体实施方式
以下结合附图对本申请实施例的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请实施例，并不用于限制本申请实施例。
本申请实施例提供了一种用于混动车辆100的发动机清理方法，该发动机清理方法主要适用于设置在混动车辆100上的发动机20，以清理发动机20的气缸内部的残存 燃油。
本申请实施例提供的发动机清理方法通过在混动车辆100处于预定的状态时执行相应的清理指令，实现对发动机20的清理。
具体的，如图10所示，混动车辆100同时装配有电机10和发动机20，如图1所示，本申请实施例提供的发动机清理方法包括：
S1、在车辆处于预定状态的情况下，执行清理指令。
具体的，执行清理指令包括：
S21、控制电机10带动发动机20按照预定转速转动，使得气体流入和流出发动机20；
S22、控制发动机20禁止喷油。
通过本申请实施例提供的发动机清理方法，可实现利用气体对发动机20进行清扫以带走发动机20气缸内部的残存燃油。
其中，混动车辆100在清理发动机20时所处的预定状态为停车状态，停车状态具体可以是驻车制动器处于启动状态且车辆档位为停车档(即P档)时的状态，或者是驻车制动器处于启动状态且车辆档位为空档(即N档)时的状态。
在一些可选实施例中，还可以将油门踏板深度和制动踏板深度作为车辆是否满足清理条件的判定之一。在一些可选实施例中，如图2所示，本申请实施例提供的发动机清理方法还包括：
S11、在混动车辆100处于停车状态，且混动车辆100的油门踏板深度大于第一预设值，制动踏板深度大于第二预设值时，执行清理指令。
其中，驻车制动器可以是手动驻车装置，也可以是电动驻车装置(即电子驻车制动系统EPB)。
其中，第一预设值和第二预设值可以根据实际需求自行设定，例如第一预设值可以为油门踏板总深度的80％，第二预设值可以为制动踏板总深度的30％。
本申请该实施例提供的方案，提出了由电机10带动发动机20在没有喷油的情况下按照预定转速转动，利用流经发动机20的空气对其进行清理，具有结构简单且易于实现的优点。
此外，在采用该方案的情况下，混动车辆100中可以取消起动机，以简化混动车辆100的结构，降低产品成本。
本申请该实施例提供的用于混动车辆100的发动机清理方法，还可以通过以下两 种任意方式开始执行：
在一些实施例中，满足一定条件后提醒用户是否需要对发动机20进行清理，如图3所示：S12、在混动车辆100的累计运行时长达到预设提醒时长后，在车辆启动或者停车时，提示是否需要对发动机20进行清理，若接收到确认清理发动机20的指令后，开始执行清理指令。
在一些实施例中，用户自行想要对发动机20进行清理时，向车辆输入清理发动机20的指令，如图4所示：S13、在任意时刻接收到清理发动机20的指令且混动车辆100状态处于停车状态时，开始执行清理指令。
在一些实施例中，如图5所示，为了避免混动车辆100出现故障，在采用本申请实施例提供的方法对发动机20进行清理时，除了判定车辆是否处于停车状态以外，还可以包括：
S14、检测电机10和发动机20是否有故障；
S15、在车辆处于停车状态，且电机10和发动机20都没有故障的情况下，执行清理发动机的方法。
在一些实施例中，如图6所示，为了进一步保障清理发动机20过程中的车辆安全，在执行清理指令的过程中，本申请实施例提供的发动机清理方法还包括：
S31、对执行清理指令进行计时；
S32、在计时时长达到预设清理时长后，停止执行清理指令。
在一些实施例中，如图7所示，为了进一步保障清理发动机20过程中的车辆安全，在执行清理指令的过程中，本申请实施例提供的发动机清理方法还包括：
S33、检测电机10和发动机20的状态；
S34、在电机10和发动机20中的任一者出现异常时，停止执行对发动机20清理的操作。
在一些实施例中，如图8所示，为了进一步保障清理发动机20过程中的车辆安全，在执行清理指令的过程中，本申请实施例提供的发动机清理方法还包括：
S35、在接收到预设用户指令后，停止执行清理指令，以退出清理发动机20的状态。其中，预设用户指令对应用户输入的停止清理发动机20的指令。
其中，用户可以通过以下任意一种方式输入有关停止清理发动机20的指令：调节车辆档位为N档和P档以外的其它档位、控制驻车制动器停止工作、调整车速至不为零及油门踏板深度或制动踏板深度未达到相应的设定阈值等。
例如油门踏板深度的设定阈值可以为油门踏板总深度的80％，制动踏板深度的设定阈值可以为制动踏板总深度的30％。其中，上述的设定阈值并非是固定值，用户可以根据车辆参数和实际经验自行设定。
本申请实施例提供的电机10故障包括：过压故障、欠压故障、过流故障、旋变变压器故障，IPB故障和缺相故障等，发动机20故障包括：发动机20无法启动、转速失控和发动机20过温等，其中，导致发动机20无法启动的原因包括但不限于传感器故障、火花塞故障、油泵压力过低和节气门故障等。
在一些可选实施例中，本申请实施例提供的用于混动车辆100的发动机清理方法可以在发生以下任意一种情况时都需要停止对发动机20进行清理：
第一种，在检测到电机10或者发动机20中的任一者出现异常时，停止对发动机20进行清理；
第二种，在开始执行清理指令时计时，并在计时时长达到预设清理时长时，停止对发动机20进行清理；
第三种，在接收到用户输入的有关停止清理的指令时，停止对发动机20进行清理。
在一些可选实施例中，为了增强发动机20清理效果，可以使得发动机20不以恒定转速动作，即控制发动机20的实际转速在设定转速值的附近上下波动。
在一些实施例中，如图9所示，为了使得发动机20能够以稳定的状态完成清理操作，本申请实施例提供的发动机清理方法还可以包括：
S23、检测发动机20的当前转速；
S24、根据发动机20的当前转速和预定转速，对发动机20的转速进行修正，以使得发动机20的转速处于预定转速的范围内。
例如，预定转速的范围是300转/分至500转/分，因而可以在300转/分至500转/分中选取任意值作为预定转速，在此基础上再设定一波动值，使得发动机20在预定转速±波动值的范围内抖动即可。其中，以400转/分为例，波动值选取100转/分，因而发动机20的转速可以在300转/分至500转/分的范围内波动。
本申请实施例提供的发动机清理方法采用闭环控制原理对发动机20转速进行持续修正，使得发动机20始终处于可控状态内，能够使得对发动机20残存燃油的清理具有较好效果，且整个清理过程中的车辆稳定性好，清理过程的可控性高。
本申请实施例提供的用于混动车辆100的发动机清理方法，采用了由电机10带动 发动机20转动，而电机10的扭矩和转速控制的控制精度很高，因而可以实现对发动机20清缸转速的精确控制。
图11是本申请实施例提供的用于混动车辆100的发动机清理方法的流程示意图。
如图11所示，本申请实施例提供的用于混动车辆100的发动机清理方法包括：
S41、检测是否满足发动机20清缸条件；发动机20清缸条件可以包括：车辆状态是否为停车状态，电机10和发动机20是否有故障；
在满足发动机20清缸条件的情况下，开始清缸，具体包括：
S42、控制发动机20禁止喷油；
S43、控制电机10拖动发动机20按照预定转速转动(可以在预定转速值上下波动，并基于闭环控制使得发动机20的转速维持在预设转速±波动转速范围内；)；
S44、在发动机20清缸开始时，开始计时；
S45、在发动机20清缸过程中，检测电机10和发动机20的状态；
S46、计时时长是否大于预设清理时长，若是，执行S48；
S47、电机10和发动机20中的至少一者是否发生状态异常，若是，执行S48；
S48、停止清缸，并允许发动机20喷油。
其中，在开始执行用于混动车辆100的发动机清理方法的任意过程中，只要接收到有关退出清缸的预设用户指令，都需要停止对发动机20的清缸操作。
图12是本申请的另一具体实施例的用于混动车辆100的发动机清理方法的流程示意图。
如图12所示，本申请实施例提供的用于混动车辆100的发动机清理方法包括：
检测是否满足发动机清缸条件，发动机清缸条件可以包括：车辆状态是否为停车状态，电机10和发动机20是否有故障；
在不满足发动机清缸条件的情况下，结束发动机20的清理。
在满足发动机清缸条件的情况下，开始清缸，包括控制发动机20禁止喷油，并开始计时，控制电机10拖动发动机20按照预定转速转动(可以在预定转速值上下波动)；
在发动机20清缸过程中，检测电机10和发动机20的状态，基于闭环控制使得发动机20的转速维持在设定转速±波动转速范围内；
在计时时长达到预设时长时，停止计时，清缸结束，允许喷油。或者
在电机10和发动机20中的至少一者状态异常时，停止清缸，并允许发动机20喷 油。在电机10或发动机20均未出现异常时，则执行上述检测计时时长是否达到预设时长的步骤。
其中，在开始执行用于混动车辆100的发动机清理方法的任意过程中，只要接收到有关退出清缸的用户指令，都需要停止对发动机20的清缸操作。
针对具有电机10和发动机20的混动车辆100，本申请实施例还提供了一种用于混动车辆100的发动机20清理系统，系统包括控制装置，主要用于在车辆处于停车状态的情况下执行清理指令，以实现对发动机20内残存的燃油进行清理。
其中，停车状态具体可以是在驻车制动器处于启动状态且为停车档(即P档)时的状态，或者是在驻车制动器处于启动状态且为空档(即N档)时的状态。其驻车制动器可以是手动驻车装置，也可以是电动驻车装置(即电子驻车制动系统EPB)。
在一些可选实施例中，在混动车辆100处于停车状态，并满足以下具体状态时才确认其满足清理条件：油门踏板深度大于第一预设值，制动踏板深度大于第二预设值。
其中，控制装置执行的清理指令具体包括：控制电机10带动发动机20按照预定转速转动，使气体流入和流出发动机20，并控制发动机20不喷油。
考虑到对于混动车辆100来说，通过电机控制器控制电机10的动作，通过发动机控制单元控制发动机20动作，因而除了通过控制装置直接控制电机10和发动机20动作以外，控制装置还可以将有关清理指令的具体操作分化为电机动作指令和发动机动作指令，并相应的分别发送至电机控制器和发动机控制单元。
在一些可选实施例中，混动车辆100的整车控制单元与电机控制器和发动机控制单元通信，因而可以使得控制装置将相应的清理指令发送至整车控制单元，或者指直接由整车控制单元作为控制装置，以简化车辆结构和降低成本。
在一些可选实施例中，在执行清理指令之前，控制装置还用于执行以下操作：检测电机10和发动机20是否有故障；以及在电机10和发动机20均没有故障的情况下，开始执行清理指令。
在一些可选实施例中，在执行清理指令之前，还可以检测驻车制动器是否处于启动状态，车速是否为0，油门踏板深度是否大于油门踏板总深度的80％，制动踏板深度是否大于制动踏板总深度的30％，并在上述条件全部满足的情况下，可以执行清理指令。
在一些可选实施例中，在开始执行清理执行后，控制装置还用于执行以下操作：对执行清理指令进行计时；以及在计时时长达到预设清理时长或者接收到预设用户指令后，停止执行清理指令。
在一些可选实施例中，计时操作可以由计时器或者时间继电器等元器件实现，也可以通过控制装置实现。
在一些可选实施例中，在执行清理指令的过程中，控制装置还用于执行以下操作：检测电机10和发动机20的状态；以及在电机10和发动机20中的任一者状态出现异常，或者接收到预设用户指令后，停止执行清理指令。
在一些可选实施例中，在执行清理执行的过程中，控制装置还用于执行以下操作：检测发动机20的当前转速；以及根据发动机20的当前转速和预定转速，对发动机20的转速进行修正，以使得发动机20的转速处于预定转速的范围内。
有关于本申请上述实施例提供的用于混动车辆100的发动机清理系统的具体细节及益处，可参阅上述针对本申请提供的用于混动车辆100的发动机清理方法的描述，于此不再赘述。
本申请实施例还提供了一种混动车辆100，混动车辆100设置有本申请上述任意实施例提供的用于混动车辆100的发动机清理系统。
在一些可选实施例中，混动车辆100的电机10可以为BSG皮带传动启动器电机或者ISG集成启动器电机，用于混动车辆100的发动机清理系统中的控制装置可以控制所述BSG皮带传动启动器电机或者ISG集成启动器电机拖动发动机20按照预定转速动作，以实现对发动机20内的残存燃油进行清理。
本申请实施例还提供了一种机器可读存储介质，机器可读存储介质上存储有指令，该指令用于使得机器执行本申请上述任意实施例提供的用于混动车辆100的发动机清理方法。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的 每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
在一个典型的配置中，计算设备包括一个或多个处理器(CPU)、输入/输出接口、网络接口和内存。
存储器可能包括计算机可读介质中的非永久性存储器，随机存取存储器(RAM)和/或非易失性内存等形式，如只读存储器(ROM)或闪存(flash RAM)。存储器是计算机可读介质的示例。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括，但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带，磁带磁磁盘存储或其他磁性存储设备或任何其他非传输介质，可用于存储可以被计算设备访问的信息。按照本文中的界定，计算机可读介质不包括暂存电脑可读媒体(transitory media)，如调制的数据信号和载波。
以上结合附图详细描述了本申请实施例的可选实施方式，但是，本申请实施例并不限于上述实施方式中的具体细节，在本申请实施例的技术构思范围内，可以对本申请实施例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实施例的保护范 围。
另外需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括要素的过程、方法、商品或者设备中还存在另外的相同要素。
以上仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理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 (17)

  1. 一种用于混动车辆的发动机清理方法，所述混动车辆包括电机和发动机，其特征在于，所述方法包括：
    在车辆处于停车状态的情况下，执行清理指令，包括控制所述电机带动所述发动机按照预定转速转动，使气体流入和流出所述发动机，并控制所述发动机不喷油。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    在所述车辆处于停车状态，且所述车辆的油门踏板深度大于第一预设值，制动踏板深度大于第二预设值的情况下，执行所述清理指令。
  3. 根据权利要求1或2所述的方法，其特征在于，在执行所述清理指令之前，所述方法还包括：
    在所述混动车辆的累计运行时长达到预设提醒时长后，在所述车辆启动或者停车时，提示是否需要对所述发动机进行清理，若接收到确认清理发动机的指令后，开始执行所述清理指令。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，在执行所述清理指令之前，所述方法还包括：
    在任意时刻接收到清理发动机的指令且所述混动车辆状态处于停车状态时，开始执行所述清理指令。
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，在执行所述清理指令之前，所述方法还包括：
    检测所述电机和发动机是否有故障；以及
    在所述电机和发动机均没有故障的情况下，开始执行所述清理指令。
  6. 根据权利要求1-5中任一项所述的方法，其特征在于，所述方法还包括：
    对所述执行清理指令进行计时；以及
    在计时时长达到预设清理时长或者接收到预设用户指令后，停止执行清理指令。
  7. 根据权利要求1-6中任一项所述的方法，其特征在于，在执行清理指令的过程中，所述方法还包括：
    检测所述电机和所述发动机的状态；以及
    在所述电机和所述发动机中的任一者状态出现异常，或者接收到预设用户指令后，停止执行清理指令。
  8. 根据权利要求1-7中任一项所述的方法，其特征在于，在执行清理指令的过程 中，所述方法还包括：
    检测所述发动机的当前转速；以及
    根据所述发动机的当前转速和所述预定转速，对所述发动机的转速进行修正，以使得所述发动机的转速处于所述预定转速的范围内。
  9. 根据权利要求8所述的方法，其特征在于，所述预定转速范围是300转/分至500转/分。
  10. 一种用于混动车辆的发动机清理系统，所述混动车辆包括电机和发动机，其特征在于，所述系统包括控制装置，用于在车辆处于停车状态的情况下执行清理指令，
    其中，所述控制装置执行所述清理指令包括：控制所述电机带动所述发动机按照预定转速转动，使气体流入和流出所述发动机，并控制所述发动机不喷油。
  11. 根据权利要求10所述的系统，其特征在于，所述控制装置用于在所述车辆处于停车状态，且所述车辆的油门踏板深度大于第一预设值，制动踏板深度大于第二预设值的情况下，执行所述清理指令。
  12. 根据权利要求10或11所述的系统，其特征在于，在执行所述清理指令之前，所述控制装置还用于执行以下操作：
    检测所述电机和发动机是否有故障；以及
    在所述电机和发动机均没有故障的情况下，开始执行所述清理指令。
  13. 根据权利要求10-12中任一项所述的系统，其特征在于，所述控制装置还用于执行以下操作：
    对所述执行清理指令进行计时；以及
    在计时时长达到预设清理时长或者接收到预设用户指令后，停止执行清理指令。
  14. 根据权利要求10-13中任一项所述的系统，其特征在于，在执行清理指令的过程中，所述控制装置还用于执行以下操作：
    检测所述电机和所述发动机的状态；以及
    在所述电机和所述发动机中的任一者状态出现异常，或者接收到预设用户指令后，停止执行清理指令。
  15. 根据权利要求10-14中任一项所述的系统，其特征在于，在执行清理执行的过程中，所述控制装置还用于执行以下操作：
    检测所述发动机的当前转速；以及
    根据所述发动机的当前转速和所述预定转速，对所述发动机的转速进行修正，以使得所述发动机的转速处于所述预定转速的范围内。
  16. 一种混动车辆，其特征在于，所述混动车辆设置有如权利要求10-15中任一项所述的用于混动车辆的发动机清理系统。
  17. 一种机器可读存储介质，该机器可读存储介质上存储有指令，该指令用于使得机器执行本申请上述权利要求1-9中任一项所述的用于混动车辆的发动机清理方法。
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