WO2024082874A1 - Engine exhaust brake control method, controller, and working machine - Google Patents

Engine exhaust brake control method, controller, and working machine Download PDF

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Publication number
WO2024082874A1
WO2024082874A1 PCT/CN2023/118250 CN2023118250W WO2024082874A1 WO 2024082874 A1 WO2024082874 A1 WO 2024082874A1 CN 2023118250 W CN2023118250 W CN 2023118250W WO 2024082874 A1 WO2024082874 A1 WO 2024082874A1
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WO
WIPO (PCT)
Prior art keywords
engine
exhaust brake
exhaust
valve
solenoid valve
Prior art date
Application number
PCT/CN2023/118250
Other languages
French (fr)
Chinese (zh)
Inventor
刘芳
程强
丁永康
Original Assignee
三一电动车科技有限公司
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Filing date
Publication date
Application filed by 三一电动车科技有限公司 filed Critical 三一电动车科技有限公司
Publication of WO2024082874A1 publication Critical patent/WO2024082874A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • 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
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to the field of electromechanical control technology, and in particular to an engine exhaust brake control method, a controller and an operating machine.
  • the present invention provides an engine exhaust brake control method, a controller and an operating machine, which are used to solve a series of defects caused by the operator's frequent or continuous braking in the prior art, and achieve rapid reduction of the engine speed to reduce the vehicle speed in a short time.
  • the present invention provides an engine exhaust brake control method, comprising:
  • the first working state includes: a result of whether an exhaust brake request switch of the working machine is closed, a result of whether a clutch switch of the working machine is closed, a result of whether a throttle switch of the working machine is closed, and an engine speed of the working machine;
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the method further includes:
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the method further comprises:
  • the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
  • the second working state includes: a result of whether the exhaust brake request switch of the working machine is closed, a result of whether the clutch switch of the working machine is closed, a result of whether the throttle switch of the working machine is closed, and an engine speed of the working machine.
  • the exhaust brake request signal includes: a brake pedal signal
  • controlling the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine comprises:
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the exhaust brake request signal includes: a hydraulic retarder operation signal
  • the exhaust passage of the machine includes:
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the method before determining whether the engine speed at the current moment is greater than the preset value when the hydraulic retarder operation signal is received, the method further includes:
  • the hydraulic retarder operation signal is received.
  • the method further comprises:
  • the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
  • the present invention also provides a controller for engine exhaust braking, comprising:
  • an acquisition module configured to acquire a first operation state of the operation machine at a current moment, wherein the first operation state includes: a result of whether an exhaust brake request switch of the operation machine is closed, a result of whether a clutch switch of the operation machine is closed, a result of whether a throttle switch of the operation machine is closed, and an engine speed of the operation machine;
  • the control module is used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition.
  • control module is also used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when receiving the exhaust brake request signal and determining that the engine speed is greater than a preset value.
  • the present invention also provides a working machine, comprising: a controller for engine exhaust braking as described in any one of the above items, or implementing an engine exhaust braking control method as described in any one of the above items.
  • the engine exhaust brake control method, controller and working machine provided by the present invention obtain the first working state of the working machine at the current moment, and the first working state includes: the result of whether the exhaust brake request switch of the working machine is closed, the result of whether the clutch switch of the working machine is closed, the result of whether the throttle switch of the working machine is closed, and the engine speed of the working machine; when no exhaust brake request signal is received and it is determined that each item in the first working state meets the preset engine exhaust brake starting conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the present invention determines that the working machine needs to start the exhaust brake at the current moment according to the working state and the engine exhaust brake starting conditions, controls the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine, and causes the engine piston to consume power in the exhaust stroke, so as to reduce the reciprocating speed of the piston, and force the engine to reduce the speed, thereby achieving the purpose of reducing the vehicle speed in a short time.
  • FIG1 is a schematic flow chart of an engine exhaust brake control method provided by the present invention.
  • FIG2 is a schematic diagram of the structure of a controller for engine exhaust braking provided by the present invention.
  • FIG3 is a schematic diagram of the structure of a control system for engine exhaust braking provided by the present invention.
  • FIG. 4 is a schematic diagram of the structure of an electronic device provided by the present invention.
  • the engine exhaust brake control method of the present invention is described below in conjunction with FIG. 1 .
  • the present invention develops a controller for engine exhaust braking for operating machinery that does not have an engine ECU.
  • the controller is connected to the CAN (Controller Area Network) network of the entire vehicle to obtain data from the CAN bus.
  • CAN Controller Area Network
  • An embodiment of the present invention provides an engine exhaust brake control method, which is applied to a controller for engine exhaust brake of a working machine. As shown in FIG1 , the method includes:
  • Step 101 obtaining the first operating state of the operating machine at the current moment.
  • the first working state includes: whether the exhaust brake request switch of the working machine is closed, whether the clutch switch of the working machine is closed, whether the throttle switch of the working machine is closed, and the engine speed of the working machine.
  • the results of whether the exhaust brake request switch is closed include: the exhaust brake request switch is closed and the exhaust brake request switch is disconnected; the results of whether the clutch switch is closed include: the clutch switch is closed and the clutch switch is disconnected; the results of whether the throttle switch is closed include: the throttle switch is closed and the throttle switch is disconnected.
  • Step 102 when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition, control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine.
  • the engine exhaust brake start conditions include: exhaust brake request switch closed, The clutch switch is closed, the throttle switch is open, and the engine speed is higher than the preset value.
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the present invention controls the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine through the first operating state and the engine exhaust brake starting condition, so that when the piston is in the exhaust stroke, the control gas is compressed in the cylinder, the piston exhaust resistance is increased, and the purpose of reducing the vehicle speed is achieved.
  • the present invention can also close the fuel supply while closing the exhaust passage of the engine, so when the working machine is downhill, this braking method can not only safely reduce the speed, but also save fuel. In addition, on icy and snowy roads, this braking method can prevent the working machine from skidding, effectively improving the user experience.
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the engine speed is obtained through the CAN bus.
  • an exhaust brake request signal is received from other devices of the operating machinery, it is determined whether the engine speed is greater than a preset value.
  • the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine; when it is determined that the engine speed is less than or equal to the preset value, the exhaust brake will be in an inhibited state and will not work (i.e., the valve of the exhaust brake solenoid valve is not controlled to close the exhaust passage of the engine), thereby avoiding the problem of poor exhaust braking effect when the engine is at low speed, or avoiding the problem of flameout that may occur when exhaust braking is performed at low engine speed.
  • the second operating state of the operating machine at the current moment is obtained; when it is determined that any one or more of the second operating states meet the preset engine exhaust brake exit conditions, the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
  • the second working state includes: a result of whether an exhaust brake request switch of the working machine is closed, a result of whether a clutch switch of the working machine is closed, a result of whether an accelerator switch of the working machine is closed, and an engine speed of the working machine.
  • the engine exhaust brake exit conditions include: the exhaust brake request switch is disconnected, the clutch switch is disconnected, the throttle switch is closed, and the engine speed is lower than the set value.
  • the preset value and the set value are different, and the preset value is greater than the set value.
  • the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine (that is, the exhaust brake solenoid valve exits operation).
  • the exhaust brake solenoid valve When the present invention detects that the second operating state meets the engine exhaust brake exit condition, the exhaust brake solenoid valve is promptly controlled to exit operation, thereby avoiding the possible flameout problem.
  • the exhaust brake request signal includes: a brake pedal signal.
  • the brake pedal signal When the brake pedal signal is received, it is determined whether the engine speed is greater than a preset value; when it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the exhaust brake when it is determined that the engine speed is less than or equal to a preset value, the exhaust brake will be in an inhibited state and will not work, thereby avoiding the problem of poor exhaust braking effect when the engine is at a low speed, or avoiding the problem of flameout caused by exhaust braking when the engine is at a low speed.
  • the present invention When receiving a brake pedal signal, the present invention performs exhaust brake control to work in conjunction with the service brake to reduce the vehicle speed, thereby improving the control effect of the vehicle speed and improving the user experience.
  • the exhaust brake request signal includes: a hydraulic retarder operation signal.
  • a hydraulic retarder operation signal When the hydraulic retarder operation signal is received, it is determined whether the engine speed is greater than a preset value; when it is determined that the engine speed is greater than the preset value, the exhaust brake electric The valve of the solenoid valve closes the exhaust passage of the engine.
  • the exhaust brake when it is determined that the engine speed is less than or equal to a preset value, the exhaust brake will be in an inhibited state and will not work, thereby avoiding the problem of poor exhaust braking effect when the engine is at a low speed, or avoiding the problem of flameout caused by exhaust braking when the engine is at a low speed.
  • the present invention When receiving the hydraulic retarder operation signal, the present invention performs exhaust brake control, that is, the exhaust brake solenoid valve works in conjunction with the hydraulic retarder to share the work burden of the hydraulic retarder, extend the working time of the hydraulic retarder, improve the vehicle auxiliary braking effect, and improve the user experience.
  • the hydraulic retarder generates and sends a hydraulic retarder operation signal based on the current brake gear or oil temperature. Therefore, the controller of the present invention receives the hydraulic retarder operation signal when it is determined that the current brake gear is greater than or equal to the preset gear, or the current oil temperature is greater than the preset oil temperature. After receiving the hydraulic retarder operation signal, the hydraulic retarder shares the work load.
  • the working state of the anti-lock braking system of the working machine is monitored in real time; when it is determined that the working state is an activated state, controlling the valve of the exhaust brake solenoid valve to open the exhaust passage of the engine.
  • the working status of the anti-lock braking system is obtained through the CAN bus.
  • the activation signal of the ABS is received, it is determined that the ABS is activated and the working status of the ABS is the activated state.
  • the valve of the exhaust brake solenoid valve is controlled to conduct the exhaust channel of the engine to avoid affecting the precise control of the ABS and reduce the safety risk of the operating machinery.
  • the engine exhaust brake control method provided by the present invention obtains the first operating state of the operating machine at the current moment, wherein the first operating state includes: the result of whether the exhaust brake request switch of the operating machine is closed, the result of whether the clutch switch of the operating machine is closed, the result of whether the throttle switch of the operating machine is closed, and the engine speed of the operating machine; when no exhaust brake request signal is received and each item in the first operating state is determined to be in compliance with Under the preset engine exhaust brake starting conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the present invention determines that the operating machinery needs to start the exhaust brake at the current moment according to the operating status and the engine exhaust brake starting conditions, and controls the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine, so that the engine piston consumes power during the exhaust stroke, so that the reciprocating speed of the piston decreases, forcing the engine to reduce the speed, thereby achieving the purpose of reducing the vehicle speed in a short time.
  • the embodiment of the present invention further provides a controller for engine exhaust braking.
  • the controller for engine exhaust braking described below and the engine exhaust braking control method described above can be referred to each other, and the repeated parts will not be repeated.
  • the controller includes:
  • the acquisition module 201 is used to acquire the first operation state of the operation machine at the current moment, where the first operation state includes: whether the exhaust brake request switch of the operation machine is closed, whether the clutch switch of the operation machine is closed, whether the throttle switch of the operation machine is closed, and the engine speed of the operation machine;
  • the control module 202 is used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when the exhaust brake request signal is not received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition.
  • the control module 202 is also used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value.
  • the acquisition module 201 is also used to obtain the second operating state of the operating machine at the current moment; the control module 202 is also used to control the valve of the exhaust brake solenoid valve to open the exhaust channel of the engine when it is determined that any one or more of the second operating states meet the preset engine exhaust brake exit conditions.
  • the exhaust brake request signal includes: a brake pedal signal; a control module 202, specifically configured to determine whether the engine speed is greater than a preset value when the brake pedal signal is received; and if the engine speed is greater than the preset value, control The valve of the exhaust brake solenoid closes the exhaust passage of the engine.
  • the exhaust brake request signal includes: a hydraulic retarder operation signal; a control module 202, which is specifically used to determine whether the engine speed is greater than a preset value when the hydraulic retarder operation signal is received; when it is determined that the engine speed is greater than the preset value, control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine.
  • control module 202 is further configured to receive a hydraulic retarder operation signal when it is determined that the braking gear at the current moment is greater than or equal to the preset gear, or the oil temperature at the current moment is greater than the preset oil temperature.
  • the acquisition module 201 is also used to monitor the working state of the anti-lock braking system of the working machine; the control module 202 is also used to control the valve of the exhaust brake solenoid valve to open the exhaust passage of the engine when the working state is determined to be an activated state.
  • a control system for engine exhaust braking which includes: a controller 301 for engine exhaust braking, an exhaust brake request switch 302, a clutch switch 303, an accelerator pedal switch 304, a CAN line 305, a signal acquisition device 306 and an exhaust brake solenoid valve 307.
  • the exhaust brake request switch 302, the clutch switch 303, and the accelerator pedal switch 304 are all connected to the controller 301 for engine exhaust braking through wires;
  • the signal acquisition device 306 is connected to the controller 301 for engine exhaust braking through the CAN line 305 for collecting the engine speed;
  • the exhaust brake solenoid valve 307 is connected to the controller 301 for engine exhaust braking through a communication line.
  • the controller 301 for engine exhaust braking is grounded, the controller 301 for engine exhaust braking is connected to a power source, and the exhaust braking solenoid valve 307 is also grounded.
  • the CAN line 305 is represented by a thick line.
  • the specific control of exhaust brake can refer to the engine exhaust brake control described above.
  • the descriptions of the control method and the controller of the engine exhaust brake are repeated and will not be repeated here.
  • An embodiment of the present invention also provides a working machine that implements the engine exhaust braking control method as described in any of the above embodiments, or includes a controller for engine exhaust braking as described in any of the above embodiments, or includes a control system for engine exhaust braking as described in any of the above embodiments.
  • operating machinery includes: excavators, cranes, road rollers, mixer trucks and pump trucks, etc.
  • FIG4 illustrates a schematic diagram of the physical structure of an electronic device.
  • the electronic device may include: a processor 401, a communications interface 402, a memory 403 and a communication bus 404, wherein the processor 401, the communications interface 402 and the memory 403 communicate with each other through the communication bus 404.
  • the processor 401 may call the logic instructions in the memory 403 to execute the engine exhaust brake control method, which includes: obtaining the first operating state of the operating machine at the current moment, the first operating state includes: the result of whether the exhaust brake request switch of the operating machine is closed, the result of whether the clutch switch of the operating machine is closed, the result of whether the throttle switch of the operating machine is closed, and the engine speed of the operating machine; when the exhaust brake request signal is not received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the logic instructions in the above-mentioned memory 403 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.
  • the technical solution of the present invention can essentially or partly contribute to the prior art or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk Or various media that can store program codes, such as CDs.
  • the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions.
  • the computer can execute the engine exhaust brake control method provided in the above-mentioned embodiments, the method including: obtaining a first operating state of the operating machinery at the current moment, the first operating state including: whether the exhaust brake request switch of the operating machinery is closed, whether the clutch switch of the operating machinery is closed, whether the throttle switch of the operating machinery is closed, and the engine speed of the operating machinery; when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start-up conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon.
  • the engine exhaust brake control method provided in the above-mentioned embodiments is implemented, the method comprising: obtaining a first operating state of the operating machine at the current moment, the first operating state comprising: whether the exhaust brake request switch of the operating machine is closed, whether the clutch switch of the operating machine is closed, whether the throttle switch of the operating machine is closed, and the engine speed of the operating machine; when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start-up conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.
  • the computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.
  • a computer device which can be a personal computer, a server, or a network device, etc.

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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 Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

An engine exhaust brake control method, a controller (301), and a working machine. The method comprises: acquiring a first working state of the working machine at the current moment, the first operation state comprising: a result of whether an exhaust brake request switch (302) of the working machine is closed, a result of whether a clutch switch (303) of the working machine is closed, a result of whether an accelerator pedal switch (304) of the working machine is closed, and the engine speed of the working machine; and controlling a valve of an exhaust brake electromagnetic valve (307) to close an exhaust channel of an engine when an exhaust brake request signal is not received and it is determined that each item in the first working state satisfies a preset engine exhaust brake starting condition.

Description

发动机排气制动控制方法、控制器以及作业机械Engine exhaust brake control method, controller and working machine 技术领域Technical Field
本发明涉及机电控制技术领域，尤其涉及一种发动机排气制动控制方法、控制器以及作业机械。The present invention relates to the field of electromechanical control technology, and in particular to an engine exhaust brake control method, a controller and an operating machine.
背景技术Background technique
当作业机械下长坡时，操作员需要频繁的或者连续的踩刹车，而作业机械的刹车鼓或刹车片可能由于长时间工作发热，导致温度过高而失效。另外，刹车产生的高温还会导致一系列的问题，例如，刹车鼓刹裂、爆胎等事故。When the machine is going down a long slope, the operator needs to brake frequently or continuously, and the brake drum or brake pad of the machine may become overheated due to long-term operation, resulting in failure. In addition, the high temperature generated by the brakes can also cause a series of problems, such as brake drum cracks, tire blowouts and other accidents.
为了解决上述问题，需要降低作业机械的发动机转速，以降低车速。因此，如何快速的降低发动机转速，从而在短时间内降低车速是目前业界亟待解决的重要课题。In order to solve the above problems, it is necessary to reduce the engine speed of the operating machine to reduce the vehicle speed. Therefore, how to quickly reduce the engine speed and thus reduce the vehicle speed in a short time is an important issue that needs to be solved in the industry.
发明内容Summary of the invention
本发明提供一种发动机排气制动控制方法、控制器以及作业机械，用以解决现有技术中的操作员在频繁或连续的踩刹车时，造成的一系列缺陷，实现快速的降低发动机转速，以在短时间内降低车速。The present invention provides an engine exhaust brake control method, a controller and an operating machine, which are used to solve a series of defects caused by the operator's frequent or continuous braking in the prior art, and achieve rapid reduction of the engine speed to reduce the vehicle speed in a short time.
本发明提供了一种发动机排气制动控制方法，包括：The present invention provides an engine exhaust brake control method, comprising:
获取当前时刻作业机械的第一作业状态，所述第一作业状态包括：所述作业机械的排气制动请求开关是否闭合的结果、所述作业机械的离合器开关是否闭合的结果、所述作业机械的油门开关是否闭合的结果、以及所述作业机械的发动机转速；Acquire a first working state of the working machine at the current moment, wherein the first working state includes: a result of whether an exhaust brake request switch of the working machine is closed, a result of whether a clutch switch of the working machine is closed, a result of whether a throttle switch of the working machine is closed, and an engine speed of the working machine;
在未接收到排气制动请求信号，以及确定所述第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭所述发动机的排气通道。 When no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
根据本发明提供的一种发动机排气制动控制方法，所述方法还包括：According to an engine exhaust brake control method provided by the present invention, the method further includes:
在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。When the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
根据本发明提供的一种发动机排气制动控制方法，所述控制排气制动电磁阀的阀门关闭所述发动机的排气通道之后，还包括：According to an engine exhaust brake control method provided by the present invention, after the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine, the method further comprises:
获取当前时刻所述作业机械的第二作业状态；Acquire the second operating state of the operating machine at the current moment;
在确定所述第二作业状态中的任一项或多项符合预设的发动机排气制动退出条件的情况下，控制所述排气制动电磁阀的阀门导通所述发动机的排气通道。When it is determined that any one or more of the second operating states meet the preset engine exhaust brake exit conditions, the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
具体地，所述第二作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速。Specifically, the second working state includes: a result of whether the exhaust brake request switch of the working machine is closed, a result of whether the clutch switch of the working machine is closed, a result of whether the throttle switch of the working machine is closed, and an engine speed of the working machine.
根据本发明提供的一种发动机排气制动控制方法，所述排气制动请求信号包括：制动踏板信号；According to an engine exhaust brake control method provided by the present invention, the exhaust brake request signal includes: a brake pedal signal;
所述在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道，包括：When the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value, controlling the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine comprises:
在接收到所述制动踏板信号的情况下，判断所述发动机转速是否大于所述预设值；When receiving the brake pedal signal, determining whether the engine speed is greater than the preset value;
在判定所述发动机转速大于所述预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。When it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
根据本发明提供的一种发动机排气制动控制方法，所述排气制动请求信号包括：液力缓速器作业信号；According to an engine exhaust brake control method provided by the present invention, the exhaust brake request signal includes: a hydraulic retarder operation signal;
所述在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动 机的排气通道，包括：When the exhaust brake request signal is received and the engine speed is determined to be greater than a preset value, the exhaust brake solenoid valve is controlled to close the engine. The exhaust passage of the machine includes:
在接收到所述液力缓速器作业信号的情况下，判断所述发动机转速是否大于所述预设值；Upon receiving the hydraulic retarder operation signal, determining whether the engine speed is greater than the preset value;
在判定所述发动机转速大于所述预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。When it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
根据本发明提供的一种发动机排气制动控制方法，所述在接收到所述液力缓速器作业信号的情况下，判断当前时刻所述发动机转速是否大于所述预设值之前，还包括：According to an engine exhaust brake control method provided by the present invention, before determining whether the engine speed at the current moment is greater than the preset value when the hydraulic retarder operation signal is received, the method further includes:
在确定当前时刻的制动档位大于或等于预设档位，或当前时刻的油温大于预设油温的情况下，接收所述液力缓速器作业信号。When it is determined that the brake gear at the current moment is greater than or equal to the preset gear, or the oil temperature at the current moment is greater than the preset oil temperature, the hydraulic retarder operation signal is received.
根据本发明提供的一种发动机排气制动控制方法，所述控制排气制动电磁阀的阀门关闭所述发动机的排气通道之后，还包括：According to an engine exhaust brake control method provided by the present invention, after the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine, the method further comprises:
监测所述作业机械的防抱死系统的工作状态；Monitoring the working status of the anti-lock braking system of the working machine;
在确定所述工作状态为激活状态的情况下，控制所述排气制动电磁阀的阀门导通所述发动机的排气通道。When it is determined that the working state is the activated state, the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
本发明还提供了一种用于发动机排气制动的控制器，包括：The present invention also provides a controller for engine exhaust braking, comprising:
获取模块，用于获取当前时刻作业机械的第一作业状态，所述第一作业状态包括：所述作业机械的排气制动请求开关是否闭合的结果、所述作业机械的离合器开关是否闭合的结果、所述作业机械的油门开关是否闭合的结果、以及所述作业机械的发动机转速；an acquisition module, configured to acquire a first operation state of the operation machine at a current moment, wherein the first operation state includes: a result of whether an exhaust brake request switch of the operation machine is closed, a result of whether a clutch switch of the operation machine is closed, a result of whether a throttle switch of the operation machine is closed, and an engine speed of the operation machine;
控制模块，用于在未接收到排气制动请求信号，以及确定所述第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭所述发动机的排气通道。The control module is used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition.
根据本发明提供的一种用于发动机排气制动的控制器，所述控制模块，还用于在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。 According to a controller for engine exhaust braking provided by the present invention, the control module is also used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when receiving the exhaust brake request signal and determining that the engine speed is greater than a preset value.
本发明还提供了一种作业机械，包括：如上任一项所述的用于发动机排气制动的控制器，或，实现如上任一项所述的发动机排气制动控制方法。The present invention also provides a working machine, comprising: a controller for engine exhaust braking as described in any one of the above items, or implementing an engine exhaust braking control method as described in any one of the above items.
本发明提供的发动机排气制动控制方法、控制器以及作业机械，通过获取当前时刻作业机械的第一作业状态，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速；在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道，可见，本发明根据作业状态和发动机排气制动启动条件，确定当前时刻作业机械需要启动排气制动，控制排气制动电磁阀的阀门关闭发动机的排气通道，使发动机的活塞在排气行程中进行功率消耗，以使活塞的往复速度下降，迫使发动机降低转速，从而达到短时间内降低车速的目的。The engine exhaust brake control method, controller and working machine provided by the present invention obtain the first working state of the working machine at the current moment, and the first working state includes: the result of whether the exhaust brake request switch of the working machine is closed, the result of whether the clutch switch of the working machine is closed, the result of whether the throttle switch of the working machine is closed, and the engine speed of the working machine; when no exhaust brake request signal is received and it is determined that each item in the first working state meets the preset engine exhaust brake starting conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine. It can be seen that the present invention determines that the working machine needs to start the exhaust brake at the current moment according to the working state and the engine exhaust brake starting conditions, controls the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine, and causes the engine piston to consume power in the exhaust stroke, so as to reduce the reciprocating speed of the piston, and force the engine to reduce the speed, thereby achieving the purpose of reducing the vehicle speed in a short time.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本发明或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，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他的附图。In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
图1是本发明提供的发动机排气制动控制方法的流程示意图；FIG1 is a schematic flow chart of an engine exhaust brake control method provided by the present invention;
图2是本发明提供的用于发动机排气制动的控制器的结构示意图；FIG2 is a schematic diagram of the structure of a controller for engine exhaust braking provided by the present invention;
图3是本发明提供的用于发动机排气制动的控制系统的结构示意图；FIG3 is a schematic diagram of the structure of a control system for engine exhaust braking provided by the present invention;
图4是本发明提供的电子设备的结构示意图。FIG. 4 is a schematic diagram of the structure of an electronic device provided by the present invention.
具体实施方式 Detailed ways
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明中的附图，对本发明中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
下面结合图1描述本发明的发动机排气制动控制方法。The engine exhaust brake control method of the present invention is described below in conjunction with FIG. 1 .
在现有技术中，一般的作业机械均具有发动机电子控制单元(ECU)，通过发动机ECU发出控制信号，以控制排气制动电磁阀。但是对于没有发动机ECU的作业机械，则无法实现排气制动。In the prior art, general working machines all have an engine electronic control unit (ECU), and the engine ECU sends a control signal to control the exhaust brake solenoid valve. However, for working machines without an engine ECU, exhaust brake cannot be implemented.
本发明针对不具有发动机ECU的作业机械，开发了用于发动机排气制动的控制器，将该控制器接入整车的CAN(Controller Area Network)网络，从CAN总线上获取数据。The present invention develops a controller for engine exhaust braking for operating machinery that does not have an engine ECU. The controller is connected to the CAN (Controller Area Network) network of the entire vehicle to obtain data from the CAN bus.
本发明实施例提供了一种发动机排气制动控制方法，以该方法应用在作业机械的用于发动机排气制动的控制器中，如图1所示，该方法包括：An embodiment of the present invention provides an engine exhaust brake control method, which is applied to a controller for engine exhaust brake of a working machine. As shown in FIG1 , the method includes:
步骤101，获取当前时刻作业机械的第一作业状态。Step 101, obtaining the first operating state of the operating machine at the current moment.
其中，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速。The first working state includes: whether the exhaust brake request switch of the working machine is closed, whether the clutch switch of the working machine is closed, whether the throttle switch of the working machine is closed, and the engine speed of the working machine.
其中，排气制动请求开关是否闭合的结果包括：排气制动请求开关闭合和排气制动请求开关断开；离合器开关是否闭合的结果包括：离合器开关闭合和离合器开关断开；油门开关是否闭合的结果包括：油门开关闭合和油门开关断开。Among them, the results of whether the exhaust brake request switch is closed include: the exhaust brake request switch is closed and the exhaust brake request switch is disconnected; the results of whether the clutch switch is closed include: the clutch switch is closed and the clutch switch is disconnected; the results of whether the throttle switch is closed include: the throttle switch is closed and the throttle switch is disconnected.
步骤102，在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。Step 102, when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition, control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine.
其中，发动机排气制动启动条件包括：排气制动请求开关闭合、 离合器开关闭合、油门开关断开以及发动机转速高于预设值。The engine exhaust brake start conditions include: exhaust brake request switch closed, The clutch switch is closed, the throttle switch is open, and the engine speed is higher than the preset value.
具体的，在未接收到排气制动请求信号，以及确定排气制动请求开关闭合、离合器开关闭合、油门开关断开、发动机转速高于预设值的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。Specifically, when no exhaust brake request signal is received, and it is determined that the exhaust brake request switch is closed, the clutch switch is closed, the throttle switch is disconnected, and the engine speed is higher than a preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
本发明通过第一作业状态和发动机排气制动启动条件，控制排气制动电磁阀的阀门关闭发动机的排气通道，使得活塞在排气行程时，控制气体在气缸内被压缩，增加了活塞排气阻力，达到了降低车速的目的。The present invention controls the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine through the first operating state and the engine exhaust brake starting condition, so that when the piston is in the exhaust stroke, the control gas is compressed in the cylinder, the piston exhaust resistance is increased, and the purpose of reducing the vehicle speed is achieved.
另外，本发明还可以在关闭发动机的排气通道的同时，关闭燃油供应，所以在作业机械下坡时采用该种制动方式，不但可以安全降速，还可以节省燃料。另外，在冰雪道路上采用该种制动方式可以避免作业机械发生侧滑，有效的提高了用户体验。In addition, the present invention can also close the fuel supply while closing the exhaust passage of the engine, so when the working machine is downhill, this braking method can not only safely reduce the speed, but also save fuel. In addition, on icy and snowy roads, this braking method can prevent the working machine from skidding, effectively improving the user experience.
一个具体实施例中，在接收到排气制动请求信号，以及确定发动机转速大于预设值的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。In a specific embodiment, when an exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
其中，发动机转速通过CAN总线得到。Among them, the engine speed is obtained through the CAN bus.
具体的，在接收到作业机械的其他器件发送的排气制动请求信号时，判断发动机转速是否大于预设值，在判定发动机转速大于预设值的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道；在判定发动机转速小于或等于预设值的情况下，排气制动会处于抑制状态，不进行工作(即不控制排气制动电磁阀的阀门关闭发动机的排气通道)，避免在发动机低转速的状态下，排气制动效果差的问题，或者避免可能在发动机低转速的状态下，进行排气制动出现的熄火问题。Specifically, when an exhaust brake request signal is received from other devices of the operating machinery, it is determined whether the engine speed is greater than a preset value. When it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine; when it is determined that the engine speed is less than or equal to the preset value, the exhaust brake will be in an inhibited state and will not work (i.e., the valve of the exhaust brake solenoid valve is not controlled to close the exhaust passage of the engine), thereby avoiding the problem of poor exhaust braking effect when the engine is at low speed, or avoiding the problem of flameout that may occur when exhaust braking is performed at low engine speed.
一个具体实施例中，在控制排气制动电磁阀的阀门关闭发动机的排气通道之后，获取当前时刻作业机械的第二作业状态；在确定第二作业状态中的任一项或多项符合预设的发动机排气制动退出条件的情况下，控制排气制动电磁阀的阀门导通发动机的排气通道。具体地， 所述第二作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速。In a specific embodiment, after the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine, the second operating state of the operating machine at the current moment is obtained; when it is determined that any one or more of the second operating states meet the preset engine exhaust brake exit conditions, the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine. Specifically, The second working state includes: a result of whether an exhaust brake request switch of the working machine is closed, a result of whether a clutch switch of the working machine is closed, a result of whether an accelerator switch of the working machine is closed, and an engine speed of the working machine.
其中，发动机排气制动退出条件包括：排气制动请求开关断开、离合器开关断开、油门开关闭合和发动机转速低于设定值。Among them, the engine exhaust brake exit conditions include: the exhaust brake request switch is disconnected, the clutch switch is disconnected, the throttle switch is closed, and the engine speed is lower than the set value.
其中，预设值和设定值不相同，预设值大于设定值。The preset value and the set value are different, and the preset value is greater than the set value.
具体的，在控制排气制动电磁阀的阀门关闭发动机的排气通道之后，实时监控作业机械的第二作业状态，在确定排气制动请求开关断开、离合器开关断开、油门开关闭合和发动机转速低于设定值中的任一项或多项成立时，控制排气制动电磁阀的阀门导通发动机的排气通道(即，排气制动电磁阀退出工作)。Specifically, after controlling the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine, the second operating state of the operating machine is monitored in real time, and when it is determined that any one or more of the exhaust brake request switch is disconnected, the clutch switch is disconnected, the throttle switch is closed, and the engine speed is lower than the set value is established, the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine (that is, the exhaust brake solenoid valve exits operation).
本发明在监测到第二作业状态符合发动机排气制动退出条件时，及时控制排气制动电磁阀退出工作，避免了可能出现的熄火问题。When the present invention detects that the second operating state meets the engine exhaust brake exit condition, the exhaust brake solenoid valve is promptly controlled to exit operation, thereby avoiding the possible flameout problem.
一个具体实施例中，排气制动请求信号包括：制动踏板信号。在接收到制动踏板信号的情况下，判断发动机转速是否大于预设值；在判定发动机转速大于预设值的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。In a specific embodiment, the exhaust brake request signal includes: a brake pedal signal. When the brake pedal signal is received, it is determined whether the engine speed is greater than a preset value; when it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
具体的，在判定发动机转速小于或等于预设值的情况下，排气制动会处于抑制状态，不进行工作，避免在发动机低转速的状态下，排气制动效果差的问题，或者避免可能在发动机低转速的状态下，进行排气制动出现的熄火问题。Specifically, when it is determined that the engine speed is less than or equal to a preset value, the exhaust brake will be in an inhibited state and will not work, thereby avoiding the problem of poor exhaust braking effect when the engine is at a low speed, or avoiding the problem of flameout caused by exhaust braking when the engine is at a low speed.
本发明在接收到制动踏板信号时，进行排气制动控制，以和行车制动联合工作，来降低车速，提高了整车车速的控制效果，提高了用户体验。When receiving a brake pedal signal, the present invention performs exhaust brake control to work in conjunction with the service brake to reduce the vehicle speed, thereby improving the control effect of the vehicle speed and improving the user experience.
一个具体实施例中，排气制动请求信号包括：液力缓速器作业信号。在接收到液力缓速器作业信号的情况下，判断发动机转速是否大于预设值；在判定发动机转速大于预设值的情况下，控制排气制动电 磁阀的阀门关闭发动机的排气通道。In a specific embodiment, the exhaust brake request signal includes: a hydraulic retarder operation signal. When the hydraulic retarder operation signal is received, it is determined whether the engine speed is greater than a preset value; when it is determined that the engine speed is greater than the preset value, the exhaust brake electric The valve of the solenoid valve closes the exhaust passage of the engine.
具体的，在判定发动机转速小于或等于预设值的情况下，排气制动会处于抑制状态，不进行工作，避免在发动机低转速的状态下，排气制动效果差的问题，或者避免可能在发动机低转速的状态下，进行排气制动出现的熄火问题。Specifically, when it is determined that the engine speed is less than or equal to a preset value, the exhaust brake will be in an inhibited state and will not work, thereby avoiding the problem of poor exhaust braking effect when the engine is at a low speed, or avoiding the problem of flameout caused by exhaust braking when the engine is at a low speed.
本发明在接收到液力缓速器作业信号时，进行排气制动控制，即排气制动电磁阀与液力缓速器联动工作，来分担液力缓速器的工作负担，延长液力缓速器的工作时间，提高车辆辅助制动效果，提高了用户体验。When receiving the hydraulic retarder operation signal, the present invention performs exhaust brake control, that is, the exhaust brake solenoid valve works in conjunction with the hydraulic retarder to share the work burden of the hydraulic retarder, extend the working time of the hydraulic retarder, improve the vehicle auxiliary braking effect, and improve the user experience.
一个具体实施例中，液力缓速器会基于当前时刻的制动档位或油温，来生成并发送液力缓速器作业信号。因此，本发明的控制器在确定当前时刻的制动档位大于或等于预设档位，或当前时刻的油温大于预设油温的情况下，接收液力缓速器作业信号。并在接收液力缓速器作业信号之后，分担液力缓速器的工作负担。In a specific embodiment, the hydraulic retarder generates and sends a hydraulic retarder operation signal based on the current brake gear or oil temperature. Therefore, the controller of the present invention receives the hydraulic retarder operation signal when it is determined that the current brake gear is greater than or equal to the preset gear, or the current oil temperature is greater than the preset oil temperature. After receiving the hydraulic retarder operation signal, the hydraulic retarder shares the work load.
一个具体实施例中，在控制排气制动电磁阀的阀门关闭发动机的排气通道之后，实时监测作业机械的防抱死系统的工作状态；在确定工作状态为激活状态的情况下，控制排气制动电磁阀的阀门导通发动机的排气通道。In a specific embodiment, after controlling the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine, the working state of the anti-lock braking system of the working machine is monitored in real time; when it is determined that the working state is an activated state, controlling the valve of the exhaust brake solenoid valve to open the exhaust passage of the engine.
具体的，通过CAN总线获取防抱死系统(ABS)的工作状态，在接收到ABS的激活信号时，确定ABS被激活，ABS的工作状态为激活状态，此时，控制排气制动电磁阀的阀门导通发动机的排气通道，避免影响ABS的精准控制，降低作业机械的安全风险。Specifically, the working status of the anti-lock braking system (ABS) is obtained through the CAN bus. When the activation signal of the ABS is received, it is determined that the ABS is activated and the working status of the ABS is the activated state. At this time, the valve of the exhaust brake solenoid valve is controlled to conduct the exhaust channel of the engine to avoid affecting the precise control of the ABS and reduce the safety risk of the operating machinery.
本发明提供的发动机排气制动控制方法，通过获取当前时刻作业机械的第一作业状态，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速；在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合 预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道，可见，本发明根据作业状态和发动机排气制动启动条件，确定当前时刻作业机械需要启动排气制动，控制排气制动电磁阀的阀门关闭发动机的排气通道，使发动机的活塞在排气行程中进行功率消耗，以使活塞的往复速度下降，迫使发动机降低转速，从而达到短时间内降低车速的目的。The engine exhaust brake control method provided by the present invention obtains the first operating state of the operating machine at the current moment, wherein the first operating state includes: the result of whether the exhaust brake request switch of the operating machine is closed, the result of whether the clutch switch of the operating machine is closed, the result of whether the throttle switch of the operating machine is closed, and the engine speed of the operating machine; when no exhaust brake request signal is received and each item in the first operating state is determined to be in compliance with Under the preset engine exhaust brake starting conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine. It can be seen that the present invention determines that the operating machinery needs to start the exhaust brake at the current moment according to the operating status and the engine exhaust brake starting conditions, and controls the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine, so that the engine piston consumes power during the exhaust stroke, so that the reciprocating speed of the piston decreases, forcing the engine to reduce the speed, thereby achieving the purpose of reducing the vehicle speed in a short time.
本发明实施例还提供了用于发动机排气制动的控制器，下文描述的用于发动机排气制动的控制器与上文描述的发动机排气制动控制方法可相互对应参照，重复之处，不再赘述，如图2所示，该控制器包括：The embodiment of the present invention further provides a controller for engine exhaust braking. The controller for engine exhaust braking described below and the engine exhaust braking control method described above can be referred to each other, and the repeated parts will not be repeated. As shown in FIG2, the controller includes:
获取模块201，用于获取当前时刻作业机械的第一作业状态，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速；The acquisition module 201 is used to acquire the first operation state of the operation machine at the current moment, where the first operation state includes: whether the exhaust brake request switch of the operation machine is closed, whether the clutch switch of the operation machine is closed, whether the throttle switch of the operation machine is closed, and the engine speed of the operation machine;
控制模块202，用于在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。一个具体实施例中，控制模块202，还用于在接收到排气制动请求信号，以及确定发动机转速大于预设值的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。The control module 202 is used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when the exhaust brake request signal is not received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition. In a specific embodiment, the control module 202 is also used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value.
一个具体实施例中，获取模块201，还用于获取当前时刻作业机械的第二作业状态；控制模块202，还用于在确定第二作业状态中的任一项或多项符合预设的发动机排气制动退出条件的情况下，控制排气制动电磁阀的阀门导通发动机的排气通道。In a specific embodiment, the acquisition module 201 is also used to obtain the second operating state of the operating machine at the current moment; the control module 202 is also used to control the valve of the exhaust brake solenoid valve to open the exhaust channel of the engine when it is determined that any one or more of the second operating states meet the preset engine exhaust brake exit conditions.
一个具体实施例中，排气制动请求信号包括：制动踏板信号；控制模块202，具体用于在接收到制动踏板信号的情况下，判断发动机转速是否大于预设值；在判定发动机转速大于预设值的情况下，控制 排气制动电磁阀的阀门关闭发动机的排气通道。In a specific embodiment, the exhaust brake request signal includes: a brake pedal signal; a control module 202, specifically configured to determine whether the engine speed is greater than a preset value when the brake pedal signal is received; and if the engine speed is greater than the preset value, control The valve of the exhaust brake solenoid closes the exhaust passage of the engine.
一个具体实施例中，排气制动请求信号包括：液力缓速器作业信号；控制模块202，具体用于在接收到液力缓速器作业信号的情况下，判断发动机转速是否大于预设值；在判定发动机转速大于预设值的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。In a specific embodiment, the exhaust brake request signal includes: a hydraulic retarder operation signal; a control module 202, which is specifically used to determine whether the engine speed is greater than a preset value when the hydraulic retarder operation signal is received; when it is determined that the engine speed is greater than the preset value, control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine.
一个具体实施例中，控制模块202，还用于在确定当前时刻的制动档位大于或等于预设档位，或当前时刻的油温大于预设油温的情况下，接收液力缓速器作业信号。In a specific embodiment, the control module 202 is further configured to receive a hydraulic retarder operation signal when it is determined that the braking gear at the current moment is greater than or equal to the preset gear, or the oil temperature at the current moment is greater than the preset oil temperature.
一个具体实施例中，获取模块201，还用于监测作业机械的防抱死系统的工作状态；控制模块202，还用于在确定工作状态为激活状态的情况下，控制排气制动电磁阀的阀门导通发动机的排气通道。In a specific embodiment, the acquisition module 201 is also used to monitor the working state of the anti-lock braking system of the working machine; the control module 202 is also used to control the valve of the exhaust brake solenoid valve to open the exhaust passage of the engine when the working state is determined to be an activated state.
具体的，下面通过图3对本发明的用于发动机排气制动的控制器和其他元件的连接关系进行具体说明：Specifically, the connection relationship between the controller for engine exhaust braking and other components of the present invention is specifically described below with reference to FIG. 3 :
其中，可以将其定义为用于发动机排气制动的控制系统，该系统包括：用于发动机排气制动的控制器301、排气制动请求开关302、离合器开关303、油门踏板开关304、CAN线305、信号采集设备306和排气制动电磁阀307。Among them, it can be defined as a control system for engine exhaust braking, which includes: a controller 301 for engine exhaust braking, an exhaust brake request switch 302, a clutch switch 303, an accelerator pedal switch 304, a CAN line 305, a signal acquisition device 306 and an exhaust brake solenoid valve 307.
排气制动请求开关302、离合器开关303、油门踏板开关304均通过导线与用于发动机排气制动的控制器301连接；信号采集设备306通过CAN线305与用于发动机排气制动的控制器301连接，用于采集发动机转速；排气制动电磁阀307通过通信线与用于发动机排气制动的控制器301连接。The exhaust brake request switch 302, the clutch switch 303, and the accelerator pedal switch 304 are all connected to the controller 301 for engine exhaust braking through wires; the signal acquisition device 306 is connected to the controller 301 for engine exhaust braking through the CAN line 305 for collecting the engine speed; the exhaust brake solenoid valve 307 is connected to the controller 301 for engine exhaust braking through a communication line.
其中，用于发动机排气制动的控制器301做接地设置，用于发动机排气制动的控制器301和电源连接，排气制动电磁阀307也做接地设置。The controller 301 for engine exhaust braking is grounded, the controller 301 for engine exhaust braking is connected to a power source, and the exhaust braking solenoid valve 307 is also grounded.
其中，在图3中CAN线305通过一条粗线表示。In FIG. 3 , the CAN line 305 is represented by a thick line.
其中，排气制动的具体控制可参见上文描述的发动机排气制动控 制方法和发动机排气制动的控制器的相关描述，重复之处，不再赘述。The specific control of exhaust brake can refer to the engine exhaust brake control described above. The descriptions of the control method and the controller of the engine exhaust brake are repeated and will not be repeated here.
本发明实施例还提供了一种作业机械，实现如上任一实施例所描述的发动机排气制动控制方法，或，包括如上任一实施例所描述的用于发动机排气制动的控制器，或，包括如上述任一实施例所描述的用于发动机排气制动的控制系统。An embodiment of the present invention also provides a working machine that implements the engine exhaust braking control method as described in any of the above embodiments, or includes a controller for engine exhaust braking as described in any of the above embodiments, or includes a control system for engine exhaust braking as described in any of the above embodiments.
其中，作业机械包括：挖掘机、起重机、压路机、搅拌车和泵车等。Among them, operating machinery includes: excavators, cranes, road rollers, mixer trucks and pump trucks, etc.
图4示例了一种电子设备的实体结构示意图，如图4所示，该电子设备可以包括：处理器(processor)401、通信接口(Communications Interface)402、存储器(memory)403和通信总线404，其中，处理器401，通信接口402，存储器403通过通信总线404完成相互间的通信。处理器401可以调用存储器403中的逻辑指令，以执行发动机排气制动控制方法，该方法包括：获取当前时刻作业机械的第一作业状态，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速；在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。FIG4 illustrates a schematic diagram of the physical structure of an electronic device. As shown in FIG4 , the electronic device may include: a processor 401, a communications interface 402, a memory 403 and a communication bus 404, wherein the processor 401, the communications interface 402 and the memory 403 communicate with each other through the communication bus 404. The processor 401 may call the logic instructions in the memory 403 to execute the engine exhaust brake control method, which includes: obtaining the first operating state of the operating machine at the current moment, the first operating state includes: the result of whether the exhaust brake request switch of the operating machine is closed, the result of whether the clutch switch of the operating machine is closed, the result of whether the throttle switch of the operating machine is closed, and the engine speed of the operating machine; when the exhaust brake request signal is not received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
此外，上述的存储器403中的逻辑指令可以通过软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟 或者光盘等各种可以存储程序代码的介质。In addition, the logic instructions in the above-mentioned memory 403 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can essentially or partly contribute to the prior art or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk Or various media that can store program codes, such as CDs.
另一方面，本发明还提供一种计算机程序产品，所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，计算机能够执行上述各实施例所提供的发动机排气制动控制方法，该方法包括：获取当前时刻作业机械的第一作业状态，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速；在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the engine exhaust brake control method provided in the above-mentioned embodiments, the method including: obtaining a first operating state of the operating machinery at the current moment, the first operating state including: whether the exhaust brake request switch of the operating machinery is closed, whether the clutch switch of the operating machinery is closed, whether the throttle switch of the operating machinery is closed, and the engine speed of the operating machinery; when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start-up conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
又一方面，本发明还提供一种非暂态计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现上述各实施例提供的发动机排气制动控制方法，该方法包括：获取当前时刻作业机械的第一作业状态，第一作业状态包括：作业机械的排气制动请求开关是否闭合的结果、作业机械的离合器开关是否闭合的结果、作业机械的油门开关是否闭合的结果、以及作业机械的发动机转速；在未接收到排气制动请求信号，以及确定第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭发动机的排气通道。On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the engine exhaust brake control method provided in the above-mentioned embodiments is implemented, the method comprising: obtaining a first operating state of the operating machine at the current moment, the first operating state comprising: whether the exhaust brake request switch of the operating machine is closed, whether the clutch switch of the operating machine is closed, whether the throttle switch of the operating machine is closed, and the engine speed of the operating machine; when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start-up conditions, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解 到各实施方式可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件。基于这样的理解，上述技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行各个实施例或者实施例的某些部分所述的方法。Through the above description of the embodiments, those skilled in the art can clearly understand Each implementation method can be implemented by means of software plus a necessary general hardware platform, or of course by hardware. Based on this understanding, the above technical solution can essentially or in other words be embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。 Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

  1. 一种发动机排气制动控制方法，其特征在于，包括：An engine exhaust brake control method, characterized by comprising:
    获取当前时刻作业机械的第一作业状态，所述第一作业状态包括：所述作业机械的排气制动请求开关是否闭合的结果、所述作业机械的离合器开关是否闭合的结果、所述作业机械的油门开关是否闭合的结果、以及所述作业机械的发动机转速；Acquire a first working state of the working machine at the current moment, wherein the first working state includes: a result of whether an exhaust brake request switch of the working machine is closed, a result of whether a clutch switch of the working machine is closed, a result of whether a throttle switch of the working machine is closed, and an engine speed of the working machine;
    在未接收到排气制动请求信号，以及确定所述第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭所述发动机的排气通道。When no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  2. 根据权利要求1所述的发动机排气制动控制方法，其特征在于，所述方法还包括：The engine exhaust brake control method according to claim 1, characterized in that the method further comprises:
    在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。When the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  3. 根据权利要求1或2所述的发动机排气制动控制方法，其特征在于，所述控制排气制动电磁阀的阀门关闭所述发动机的排气通道之后，还包括：The engine exhaust brake control method according to claim 1 or 2, characterized in that after the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine, it also includes:
    获取当前时刻所述作业机械的第二作业状态；Acquire the second operating state of the operating machine at the current moment;
    在确定所述第二作业状态中的任一项或多项符合预设的发动机排气制动退出条件的情况下，控制所述排气制动电磁阀的阀门导通所述发动机的排气通道。When it is determined that any one or more of the second operating states meet the preset engine exhaust brake exit conditions, the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
  4. 根据权利要求2所述的发动机排气制动控制方法，其特征在于，所述排气制动请求信号包括：制动踏板信号；The engine exhaust brake control method according to claim 2, characterized in that the exhaust brake request signal comprises: a brake pedal signal;
    所述在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道，包括：When the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value, controlling the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine comprises:
    在接收到所述制动踏板信号的情况下，判断所述发动机转速是否 大于所述预设值；When the brake pedal signal is received, it is determined whether the engine speed is greater than the preset value;
    在判定所述发动机转速大于所述预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。When it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  5. 根据权利要求2所述的发动机排气制动控制方法，其特征在于，所述排气制动请求信号包括：液力缓速器作业信号；The engine exhaust brake control method according to claim 2, characterized in that the exhaust brake request signal comprises: a hydraulic retarder operation signal;
    所述在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道，包括：When the exhaust brake request signal is received and it is determined that the engine speed is greater than a preset value, controlling the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine comprises:
    在接收到所述液力缓速器作业信号的情况下，判断所述发动机转速是否大于所述预设值；Upon receiving the hydraulic retarder operation signal, determining whether the engine speed is greater than the preset value;
    在判定所述发动机转速大于所述预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。When it is determined that the engine speed is greater than the preset value, the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine.
  6. 根据权利要求5所述的发动机排气制动控制方法，其特征在于，所述在接收到所述液力缓速器作业信号的情况下，判断当前时刻所述发动机转速是否大于所述预设值之前，还包括：The engine exhaust brake control method according to claim 5 is characterized in that, before determining whether the engine speed at the current moment is greater than the preset value when the hydraulic retarder operation signal is received, it also includes:
    在确定当前时刻的制动档位大于或等于预设档位，或当前时刻的油温大于预设油温的情况下，接收所述液力缓速器作业信号。When it is determined that the brake gear at the current moment is greater than or equal to the preset gear, or the oil temperature at the current moment is greater than the preset oil temperature, the hydraulic retarder operation signal is received.
  7. 根据权利要求1或2所述的发动机排气制动控制方法，其特征在于，所述控制排气制动电磁阀的阀门关闭所述发动机的排气通道之后，还包括：The engine exhaust brake control method according to claim 1 or 2, characterized in that after the valve of the exhaust brake solenoid valve is controlled to close the exhaust passage of the engine, it also includes:
    监测所述作业机械的防抱死系统的工作状态；Monitoring the working status of the anti-lock braking system of the working machine;
    在确定所述工作状态为激活状态的情况下，控制所述排气制动电磁阀的阀门导通所述发动机的排气通道。When it is determined that the working state is the activated state, the valve of the exhaust brake solenoid valve is controlled to open the exhaust passage of the engine.
  8. 一种用于发动机排气制动的控制器，其特征在于，包括：A controller for engine exhaust braking, characterized by comprising:
    获取模块，用于获取当前时刻作业机械的第一作业状态，所述第一作业状态包括：所述作业机械的排气制动请求开关是否闭合的结果、所述作业机械的离合器开关是否闭合的结果、所述作业机械的油门开 关是否闭合的结果、以及所述作业机械的发动机转速；The acquisition module is used to acquire the first operation state of the operation machine at the current moment, wherein the first operation state includes: whether the exhaust brake request switch of the operation machine is closed, whether the clutch switch of the operation machine is closed, and whether the throttle switch of the operation machine is closed. the result of whether the switch is closed, and the engine speed of the working machine;
    控制模块，用于在未接收到排气制动请求信号，以及确定所述第一作业状态中的每一项均符合预设的发动机排气制动启动条件的情况下，控制排气制动电磁阀的阀门关闭所述发动机的排气通道。The control module is used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when no exhaust brake request signal is received and it is determined that each item in the first operating state meets the preset engine exhaust brake start condition.
  9. 根据权利要求8所述的用于发动机排气制动的控制器，其特征在于，所述控制模块，还用于在接收到所述排气制动请求信号，以及确定所述发动机转速大于预设值的情况下，控制所述排气制动电磁阀的阀门关闭所述发动机的排气通道。The controller for engine exhaust braking according to claim 8 is characterized in that the control module is also used to control the valve of the exhaust brake solenoid valve to close the exhaust passage of the engine when receiving the exhaust brake request signal and determining that the engine speed is greater than a preset value.
  10. 一种作业机械，其特征在于，包括如权利要求8-9任一项所述的用于发动机排气制动的控制器，或，用于实现如权利要求1-7任一项所述的发动机排气制动控制方法。 A working machine, characterized in that it comprises a controller for engine exhaust braking as described in any one of claims 8-9, or is used to implement the engine exhaust braking control method as described in any one of claims 1-7.
PCT/CN2023/118250 2022-10-20 2023-09-12 Engine exhaust brake control method, controller, and working machine WO2024082874A1 (en)

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