Engine shutdown method, device, storage medium and vehicle

Abstract

The present invention discloses an engine shutdown method, device, storage medium and automobile, which obtain the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down, determine the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, engine water temperature and engine intake temperature, and coordinately control the engine's intake throttle valve and exhaust throttle valve according to the target shutdown mode until the engine is completely shut down. During the engine shutdown process, the present invention controls the engine's intake volume and exhaust pressure by coordinately controlling the intake throttle valve and the exhaust throttle valve, thereby realizing auxiliary shutdown of the engine, so that the engine speed can be quickly reduced to 0 when it is shut down, thereby shortening the time the engine is at the resonant speed, reducing the vibration of the whole vehicle caused by the resonant speed, and thus improving the driver's comfort experience of driving the car.

Description

Technical Field

[0001] The present invention relates to the technical field of engine shutdown, and more particularly to an engine shutdown method, device, storage medium and automobile. Background Art

[0002] With the popularity of automobiles, people's requirements for automobile driving comfort are constantly increasing. When the car arrives at the destination, the driver will shut down the engine. During the engine shutdown process, the engine speed will slowly decrease until the engine speed reaches 0, and the engine shutdown is completed. However, when the engine speed slowly decreases to the resonant speed of the engine and the whole vehicle, obvious vehicle vibration will occur, resulting in a poor driving comfort experience for the driver. Summary of the invention

[0003] In view of this, the present invention discloses an engine shutdown method, device, storage medium and automobile to achieve auxiliary shutdown of the engine, so that the engine speed can be quickly reduced to 0 when it is shut down, thereby shortening the time when the engine is at the resonant speed, reducing the vibration of the whole vehicle caused by the resonant speed, and thus improving the driver's driving comfort experience.

[0004] An engine shutdown method, comprising:

[0005] Obtain the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down;

[0006] Determining a target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature;

[0007] The intake throttle valve and the exhaust throttle valve of the engine are cooperatively controlled according to the target shutdown mode until the engine is completely shut down.

[0008] Optionally, determining a target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature includes:

[0009] When only one of the three conditions, namely, the engine speed is less than the speed limit, the engine water temperature is greater than the water temperature limit, and the engine intake temperature is less than the intake temperature limit, is satisfied, the target shutdown mode of the engine is determined to be the first shutdown mode.

[0010] Optionally, the collaboratively controlling the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down includes:

[0011] When the target shutdown mode is the first shutdown mode, the exhaust butterfly valve of the engine is controlled to be completely closed, and the intake throttle valve of the engine is controlled to be closed to a first preset opening.

[0012] Optionally, determining a target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature includes:

[0013] When any two of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake temperature being less than the intake temperature limit are met, the target shutdown mode of the engine is determined to be the second shutdown mode.

[0014] Optionally, the collaboratively controlling the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down includes:

[0015] When the target shutdown mode is the second shutdown mode, the intake throttle valve of the engine is controlled to be completely closed, and the exhaust butterfly valve of the engine is controlled to be closed to a second preset opening.

[0016] Optionally, determining a target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature includes:

[0017] When the engine speed is less than the speed limit, the engine water temperature is greater than the water temperature limit, and the engine intake temperature is less than the intake temperature limit, the target shutdown mode of the engine is determined to be the third shutdown mode.

[0018] Optionally, the collaboratively controlling the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down includes:

[0019] When the target shutdown mode is the third shutdown mode, the intake throttle valve and the exhaust butterfly valve of the engine are controlled to be completely closed.

[0020] An engine stopping device, comprising:

[0021] An acquisition unit, used to acquire the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down;

[0022] A shutdown mode determination unit, configured to determine a target shutdown mode corresponding to the engine under a current operating condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature;

[0023] A shutdown control unit is used to coordinately control the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down.

[0024] A computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the above-mentioned engine shutdown method is implemented.

[0025] An automobile includes an engine controller, wherein the engine controller includes a memory and a processor;

[0026] The memory is used to store at least one instruction;

[0027] The processor is configured to execute the at least one instruction to implement the above-mentioned engine shutdown method.

[0028] It can be seen from the above technical solutions that the present invention discloses an engine shutdown method, device, storage medium and automobile, obtains the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down, determines the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, engine water temperature and engine intake temperature, and coordinately controls the engine's intake throttle valve and exhaust throttle valve according to the target shutdown mode until the engine is completely shut down. During the engine shutdown process, the present invention controls the engine's intake volume and exhaust pressure by coordinately controlling the intake throttle valve and the exhaust throttle valve, thereby realizing an auxiliary shutdown of the engine, so that the engine speed can be quickly reduced to 0 when it is shut down, thereby shortening the time the engine is at a resonant speed, reducing the vibration of the entire vehicle caused by the resonant speed, and thereby improving the driver's comfort experience of driving the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without paying creative work.

[0030] Figure 1 A flow chart of an engine shutdown method disclosed in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of an engine stopping device disclosed in an embodiment of the present invention;

[0032] Figure 3 The present invention is a schematic diagram of the structure of an engine controller in a car disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0034] The embodiment of the present invention discloses an engine shutdown method, device, storage medium and automobile, which obtains the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down, determines the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, engine water temperature and engine intake temperature, and coordinately controls the engine's intake throttle valve and exhaust throttle valve according to the target shutdown mode until the engine is completely shut down. During the engine shutdown process, the present invention controls the engine's intake volume and exhaust pressure by coordinately controlling the intake throttle valve and the exhaust throttle valve, thereby realizing auxiliary shutdown of the engine, so that the engine speed can be quickly reduced to 0 when the engine is shut down, thereby shortening the time the engine is at the resonant speed, reducing the vibration of the whole vehicle caused by the resonant speed, and thus improving the driver's comfort experience of driving the car.

[0035] See also Figure 1 , a flow chart of an engine shutdown method disclosed in an embodiment of the present invention, the method comprising:

[0036] Step S101, obtaining the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down;

[0037] In actual applications, when the engine receives an engine shutdown request, the engine does not shut down immediately, but gradually reduces the engine speed from the current speed to 0 to complete the entire shutdown process.

[0038] This embodiment obtains the engine speed, engine water temperature, and engine intake temperature when the engine receives an engine shutdown request and responds to the engine shutdown request, that is, when the engine starts to shut down.

[0039] Step S102, determining a target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature;

[0040] In actual applications, the engine speed, engine water temperature and engine intake temperature corresponding to different engine operating conditions will be different.

[0041] For example, when the engine is shut down right after it is started, the engine speed may be relatively high, but the engine water temperature and the engine intake temperature are relatively low. When the engine runs for a long time, the engine speed, engine water temperature, and engine intake temperature are relatively high.

[0042] Based on this, the present application sets different shutdown modes based on the different numerical values ​​of engine speed, engine water temperature and engine intake temperature, so that the target shutdown mode corresponding to the current operating condition of the engine can be determined according to the numerical values ​​of engine speed, engine water temperature and engine intake temperature collected when the engine starts to shut down.

[0043] Step S103: coordinately control the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down.

[0044] The intake throttle valve refers to a valve installed at the intake end of the engine, which can control the amount of air entering the engine.

[0045] The exhaust butterfly valve refers to the valve installed after the engine supercharger, which can control the exhaust pressure of the engine and thus affect the engine's intake volume.

[0046] This embodiment realizes control over the intake and exhaust of the engine by cooperatively controlling the intake throttle valve and the exhaust throttle valve of the engine, thereby rapidly reducing the engine speed to 0.

[0047] In summary, the present invention discloses an engine shutdown method, which obtains the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down, determines the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, engine water temperature and engine intake temperature, and coordinately controls the engine's intake throttle valve and exhaust throttle valve according to the target shutdown mode until the engine is completely shut down. During the engine shutdown process, the present invention controls the engine's intake volume and exhaust pressure by coordinately controlling the intake throttle valve and the exhaust throttle valve, thereby realizing an auxiliary shutdown of the engine, so that the engine speed can be quickly reduced to 0 when the engine is shut down, thereby shortening the time the engine is at a resonant speed, reducing the vibration of the entire vehicle caused by the resonant speed, and thus improving the driver's comfort experience of driving the car.

[0048] It should be noted that although the above embodiments depict various operations in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. In certain circumstances, multitasking and parallel processing may be advantageous.

[0049] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0050] To further optimize the above embodiment, step S102 may specifically include:

[0051] When only one of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake temperature being less than the intake temperature limit is satisfied, the target shutdown mode of the engine is determined to be the first shutdown mode.

[0052] In practical applications, the speed limit can be determined based on the engine's idle speed. Assuming the idle speed is 750r / min, (750r / min+50r / min) can be used as the speed limit, and 50r / min is a calibration value. The specific value depends on actual needs.

[0053] The water temperature limit value is determined according to actual needs, such as 60° C., and the present invention does not limit it here.

[0054] The value of the intake air temperature limit is determined according to actual needs, such as -10°C, and the present invention does not limit it here.

[0055] When the target shutdown mode of the engine is the first shutdown mode, correspondingly, step S103 may specifically include:

[0056] When the target shutdown mode is the first shutdown mode, the exhaust butterfly valve of the engine is controlled to be completely closed, and the intake throttle valve of the engine is controlled to be closed to a first preset opening.

[0057] It should be noted that the first preset opening is smaller than the total opening of the intake throttle valve, and the size of the first preset opening is determined according to actual needs, and the present invention does not limit it here.

[0058] In the first shutdown mode, the engine speed may be high or the engine temperature may be low. If the intake throttle valve is completely closed, there will be a risk of oil backflow. Based on this, this embodiment only closes the intake throttle valve to the first preset opening, and does not completely close the intake throttle valve. Therefore, the oil backflow problem caused by closing the intake throttle valve can be effectively avoided.

[0059] To further optimize the above embodiment, step S102 may specifically include:

[0060] When any two of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake temperature being less than the intake temperature limit are met, the target shutdown mode of the engine is determined to be the second shutdown mode.

[0061] When the target shutdown mode of the engine is the second shutdown mode, correspondingly, step S103 may specifically include:

[0062] When the target shutdown mode is the second shutdown mode, the intake throttle valve of the engine is controlled to be completely closed, and the exhaust butterfly valve of the engine is controlled to be closed to a second preset opening.

[0063] In the second shutdown mode, if any two of the three conditions of engine speed being less than the speed limit, engine water temperature being greater than the water temperature limit, and engine intake temperature being less than the intake temperature limit are met, it indicates that the engine is hot or the engine speed is low. At this time, even if the intake throttle valve is completely closed, the risk of oil backflow will be small. Compared with completely closing the exhaust butterfly valve, completely closing the intake throttle valve can shorten the time required for the engine speed to drop to 0 when the engine is shut down. Based on this, when determining that the target shutdown mode of the engine is the second shutdown mode, this embodiment controls the intake throttle valve of the engine to be completely closed, and controls the exhaust butterfly valve of the engine to close the second preset opening. The value of the second preset opening is determined according to actual needs, and the present invention is not limited here.

[0064] To further optimize the above embodiment, step S102 may specifically include:

[0065] When the engine speed is less than the speed limit, the engine water temperature is greater than the water temperature limit, and the engine intake temperature is less than the intake temperature limit, the target shutdown mode of the engine is determined to be the third shutdown mode.

[0066] When the target shutdown mode of the engine is the third shutdown mode, correspondingly, step S103 may specifically include:

[0067] When the target shutdown mode is the third shutdown mode, the intake throttle valve and the exhaust butterfly valve of the engine are controlled to be completely closed.

[0068] In the third stop mode, the three conditions of engine speed less than the speed limit, engine water temperature greater than the water temperature limit, and engine intake temperature less than the intake temperature limit are met at the same time, indicating that the engine is hot and the engine speed is low. At this time, even if the intake throttle valve is completely closed, the risk of oil backflow will be extremely small. In order to optimize the anti-shake function of the vehicle, this embodiment will control the engine's intake throttle valve and exhaust butterfly valve to be completely closed when determining that the target stop mode of the engine is the third stop mode.

[0069] Corresponding to the above method embodiment, the present invention also discloses an engine stopping device.

[0070] See also Figure 2 , a schematic diagram of the structure of an engine stopping device disclosed in an embodiment of the present invention, the device may include:

[0071] An acquisition unit 201 is used to acquire the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down;

[0072] In actual applications, when the engine receives an engine shutdown request, the engine does not shut down immediately, but gradually reduces the engine speed from the current speed to 0 to complete the entire shutdown process.

[0073] This embodiment obtains the engine speed, engine water temperature, and engine intake temperature when the engine receives an engine shutdown request and responds to the engine shutdown request, that is, when the engine starts to shut down.

[0074] A stop mode determination unit 202, configured to determine a target stop mode corresponding to the engine under a current operating condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature;

[0075] In actual applications, the engine speed, engine water temperature and engine intake temperature corresponding to different engine operating conditions will be different.

[0076] For example, when the engine is shut down right after it is started, the engine speed may be relatively high, but the engine water temperature and the engine intake temperature are relatively low. When the engine runs for a long time, the engine speed, engine water temperature, and engine intake temperature are relatively high.

[0077] Based on this, the present application sets different shutdown modes based on the different numerical values ​​of engine speed, engine water temperature and engine intake temperature, so that the target shutdown mode corresponding to the current operating condition of the engine can be determined according to the numerical values ​​of engine speed, engine water temperature and engine intake temperature collected when the engine starts to shut down.

[0078] The shutdown control unit 203 is used to coordinately control the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down.

[0079] The intake throttle valve refers to a valve installed at the intake end of the engine, which can control the amount of air entering the engine.

[0080] The exhaust butterfly valve refers to the valve installed after the engine supercharger, which can control the exhaust pressure of the engine and thus affect the engine's intake volume.

[0081] This embodiment realizes control over the intake and exhaust of the engine by cooperatively controlling the intake throttle valve and the exhaust throttle valve of the engine, thereby rapidly reducing the engine speed to 0.

[0082] In summary, the present invention discloses an engine shutdown device, which obtains the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down, determines the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, engine water temperature and engine intake temperature, and coordinately controls the engine's intake throttle valve and exhaust throttle valve according to the target shutdown mode until the engine is completely shut down. During the engine shutdown process, the present invention controls the engine's intake volume and exhaust pressure by coordinately controlling the intake throttle valve and the exhaust throttle valve, thereby realizing an auxiliary shutdown of the engine, so that the engine speed can be quickly reduced to 0 when it is shut down, thereby shortening the time the engine is at a resonant speed, reducing the vibration of the entire vehicle caused by the resonant speed, and thereby improving the driver's comfort experience of driving the car.

[0083] To further optimize the above embodiment, the shutdown mode determination unit 202 may be specifically used for:

[0084] When only one of the three conditions, namely, the engine speed is less than the speed limit, the engine water temperature is greater than the water temperature limit, and the engine intake temperature is less than the intake temperature limit, is satisfied, the target shutdown mode of the engine is determined to be the first shutdown mode.

[0085] In practical applications, the speed limit can be determined based on the engine's idle speed. Assuming the idle speed is 750r / min, (750r / min+50r / min) can be used as the speed limit, and 50r / min is a calibration value. The specific value depends on actual needs.

[0086] The water temperature limit value is determined according to actual needs, such as 60° C., and the present invention does not limit it here.

[0087] The value of the intake air temperature limit is determined according to actual needs, such as -10°C, and the present invention does not limit it here.

[0088] When the target shutdown mode of the engine is the first shutdown mode, correspondingly, the shutdown control unit 203 can be specifically used for:

[0089] When the target shutdown mode is the first shutdown mode, the exhaust butterfly valve of the engine is controlled to be completely closed, and the intake throttle valve of the engine is controlled to be closed to a first preset opening.

[0090] It should be noted that the first preset opening is smaller than the total opening of the intake throttle valve, and the size of the first preset opening is determined according to actual needs, and the present invention does not limit it here.

[0091] In the first shutdown mode, the engine speed may be high or the engine temperature may be low. If the intake throttle valve is completely closed, there will be a risk of oil backflow. Based on this, this embodiment only closes the intake throttle valve to the first preset opening, and does not completely close the intake throttle valve. Therefore, the oil backflow problem caused by closing the intake throttle valve can be effectively avoided.

[0092] To further optimize the above embodiment, the shutdown mode determination unit 202 may be specifically used for:

[0093] When any two of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake temperature being less than the intake temperature limit are met, the target shutdown mode of the engine is determined to be the second shutdown mode.

[0094] When the target shutdown mode of the engine is the second shutdown mode, correspondingly, the shutdown control unit 203 can be specifically used for:

[0095] When the target shutdown mode is the second shutdown mode, the intake throttle valve of the engine is controlled to be completely closed, and the exhaust butterfly valve of the engine is controlled to be closed to a second preset opening.

[0096] In the second shutdown mode, if any two of the three conditions of engine speed being less than the speed limit, engine water temperature being greater than the water temperature limit, and engine intake temperature being less than the intake temperature limit are met, it indicates that the engine is hot or the engine speed is low. At this time, even if the intake throttle valve is completely closed, the risk of oil backflow will be small. Compared with completely closing the exhaust butterfly valve, completely closing the intake throttle valve can shorten the time required for the engine speed to drop to 0 when the engine is shut down. Based on this, when determining that the target shutdown mode of the engine is the second shutdown mode, this embodiment controls the intake throttle valve of the engine to be completely closed, and controls the exhaust butterfly valve of the engine to close the second preset opening. The value of the second preset opening is determined according to actual needs, and the present invention is not limited here.

[0097] To further optimize the above embodiment, the shutdown mode determination unit 202 may be specifically used for:

[0098] When the engine speed is less than the speed limit, the engine water temperature is greater than the water temperature limit, and the engine intake temperature is less than the intake temperature limit, the target shutdown mode of the engine is determined to be the third shutdown mode.

[0099] When the target shutdown mode of the engine is the third shutdown mode, correspondingly, the shutdown control unit 203 can be specifically used for:

[0100] When the target shutdown mode is the third shutdown mode, the intake throttle valve and the exhaust butterfly valve of the engine are controlled to be completely closed.

[0101] In the third stop mode, the three conditions of engine speed less than the speed limit, engine water temperature greater than the water temperature limit, and engine intake temperature less than the intake temperature limit are met at the same time, indicating that the engine is hot and the engine speed is low. At this time, even if the intake throttle valve is completely closed, the risk of oil backflow will be extremely small. In order to optimize the anti-shake function of the vehicle, this embodiment will control the engine's intake throttle valve and exhaust butterfly valve to be completely closed when determining that the target stop mode of the engine is the third stop mode.

[0102] It should be noted that the units involved in the embodiments described in the present disclosure may be implemented by software or hardware. The name of a unit does not limit the unit itself in some cases. For example, the first acquisition unit may also be described as a "unit for acquiring at least two Internet Protocol addresses".

[0103] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0104] To further optimize the above embodiment, the present invention further discloses a computer-readable storage medium, which stores at least one instruction. When the at least one instruction is executed by a processor, the steps shown in the engine shutdown method embodiment are implemented.

[0105] It should be noted that a computer-readable storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may be a machine-readable signal medium or a machine-readable storage medium. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0106] To further optimize the above embodiment, see Figure 3 , a schematic diagram of the structure of an engine controller in a car disclosed in an embodiment of the present invention, the engine controller comprises: a processor 1 and a memory 2;

[0107] The processor 1 and the memory 2 communicate with each other via a communication bus 3;

[0108] Processor 1, configured to execute at least one instruction;

[0109] Memory 2, used to store at least one instruction;

[0110] The processor 1 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0111] The memory 2 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0112] The processor executes at least one instruction to implement the steps shown in the engine shutdown method embodiment.

[0113] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0114] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0115] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine shutdown method, characterized in that: include: Obtain the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down; Determining a target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature; Coordinately controlling an intake throttle valve and an exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down; Wherein, determining the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature includes: When only one of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake air temperature being less than the intake air temperature limit is satisfied, determining that the target shutdown mode of the engine is the first shutdown mode; The step of cooperatively controlling the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down includes: When the target shutdown mode is the first shutdown mode, the exhaust butterfly valve of the engine is controlled to be completely closed, and the intake throttle valve of the engine is controlled to be closed to a first preset opening.

2. The engine shutdown method according to claim 1, characterized in that: The determining of the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature includes: When any two of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake temperature being less than the intake temperature limit are met, the target shutdown mode of the engine is determined to be the second shutdown mode.

3. The engine shutdown method according to claim 2, characterized in that: The step of cooperatively controlling the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down includes: When the target shutdown mode is the second shutdown mode, the intake throttle valve of the engine is controlled to be completely closed, and the exhaust butterfly valve of the engine is controlled to be closed to a second preset opening.

4. The engine shutdown method according to claim 1, characterized in that: The determining of the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature includes: When the engine speed is less than the speed limit, the engine water temperature is greater than the water temperature limit, and the engine intake temperature is less than the intake temperature limit, the target shutdown mode of the engine is determined to be the third shutdown mode.

5. The engine shutdown method according to claim 4, characterized in that: The step of cooperatively controlling the intake throttle valve and the exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down includes: When the target shutdown mode is the third shutdown mode, the intake throttle valve and the exhaust butterfly valve of the engine are controlled to be completely closed.

6. An engine stopping device, characterized in that: include: An acquisition unit, used to acquire the engine speed, engine water temperature and engine intake temperature when the engine starts to shut down; A shutdown mode determination unit, configured to determine a target shutdown mode corresponding to the engine under a current operating condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature; A shutdown control unit, configured to coordinately control an intake throttle valve and an exhaust throttle valve of the engine according to the target shutdown mode until the engine is completely shut down; The shutdown mode determination unit determines the target shutdown mode corresponding to the engine under the current working condition based on the numerical values ​​of the engine speed, the engine water temperature and the engine intake temperature, and is specifically used for: When only one of the three conditions of the engine speed being less than the speed limit, the engine water temperature being greater than the water temperature limit, and the engine intake air temperature being less than the intake air temperature limit is satisfied, determining that the target shutdown mode of the engine is the first shutdown mode; When the target shutdown mode is the first shutdown mode, the shutdown control unit is specifically used to: control the exhaust butterfly valve of the engine to be completely closed, and control the intake throttle valve of the engine to be closed to a first preset opening.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the engine shutdown method according to any one of claims 1 to 5 is implemented.

8. A vehicle, comprising an engine controller, characterized in that: The engine controller includes a memory and a processor; The memory is used to store at least one instruction; The processor is configured to execute the at least one instruction to implement the engine shutdown method according to any one of claims 1 to 5.

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