Gear clutch protection method, device and storage medium

Abstract

A gear clutch protection method, a device, and a storage medium. The gear clutch protection method comprises: an automatic transmission control unit sends a shutdown enable signal to an engine control unit, so that the engine control unit controls an engine to enter a start-stop shutdown process (S10); the automatic transmission control unit acquires a gear clutch risk point (S11); and, according to the gear clutch risk point, the automatic transmission control unit outputs a gear clutch protection policy (S12).

Description

Gear clutch protection method, device and storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 30, 2023, with application number 202311108546.4, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of vehicle control technology, for example, to a gear clutch protection method, device and storage medium. Background Art

[0003] The engine start-stop function allows the engine control unit to stop and start the engine at the appropriate time based on the vehicle's operating status, thereby saving fuel and reducing emissions. To ensure quick starting performance after the vehicle starts, some hydromechanical automatic transmissions are equipped with a small electric oil pump to maintain a relatively low oil pressure in the first gear clutch after the engine start-stop function is activated and the shutdown is permitted.

[0004] During the start-stop process of a vehicle equipped with a hydromechanical automatic transmission, when a fault occurs in the vehicle system and the engine cannot be shut down after the hydromechanical automatic transmission control unit sends a shutdown permission signal, the engine will drive the torque converter's turbine to continue running under the torque increase of the torque converter, thereby driving the active plate of the first gear clutch mechanically connected to the rear end of the torque converter turbine to continue running. Since the engine start-stop generally occurs when the vehicle is stopped, the driven plate speed of the first gear clutch is 0. At this time, the first gear clutch maintains a certain oil pressure under the action of the electric pump, and the heat capacity of the hydromechanical automatic transmission's gear clutch is relatively small. Therefore, it is easy to cause the first gear clutch to burn out in this case.

[0005] Summary of the Invention

[0006] The present application provides a gear clutch protection method, device and storage medium to solve the problem of a vehicle equipped with a hydromechanical automatic transmission being unable to shut down its engine during engine start-stop or shutdown due to a vehicle system failure, thereby causing the first gear clutch of the hydromechanical automatic transmission to burn out.

[0007] According to one aspect of the present application, a gear clutch protection method is provided, comprising:

[0008] The automatic transmission control unit sends a stop permission signal to the engine control unit, and the engine control unit controls the engine to enter the start-stop process;

[0009] Automatic transmission control unit obtains gear clutch risk points;

[0010] The automatic transmission control unit outputs the gear clutch protection strategy according to the gear clutch risk point.

[0011] Optionally, before the automatic transmission control unit sends the shutdown permission signal to the engine control unit and the engine control unit controls the engine to enter the start-stop shutdown process, the method further includes:

[0012] When the automatic transmission control unit detects that multiple signals from the vehicle system meet the first engine start-stop requirement, the automatic transmission control unit sends a stop enable signal to the engine control unit. After receiving the stop enable signal, the engine control unit determines whether the current vehicle driving state meets the second engine start-stop requirement.

[0013] If the current driving state of the vehicle meets the second engine start-stop requirement, the engine control unit sends a stop request signal to the automatic transmission control unit. After receiving the stop request signal sent by the engine control unit, the automatic transmission control unit determines whether the current vehicle is in the gear shifting process;

[0014] If the vehicle is not currently in the gear shifting process, the automatic transmission control unit sends a stop permission signal to the engine control unit.

[0015] Optionally, the automatic transmission control unit obtains gear clutch risk points, including:

[0016] The automatic transmission control unit acquires a vehicle system fault signal and / or an engine speed abnormality fault signal in the vehicle system.

[0017] Optionally, the automatic transmission control unit outputs a gear clutch protection strategy based on the gear clutch risk point, including:

[0018] The automatic transmission control unit outputs an electric pump off command to control the oil pressure of the gear clutch to drop to 0.

[0019] Optionally, the automatic transmission control unit obtains a vehicle system fault signal in the vehicle system, including:

[0020] The engine control unit constantly monitors whether there are any faults in the current vehicle system that may affect engine start-stop or shutdown;

[0021] If there is a fault in the current vehicle system that affects the start-stop function of the engine, the engine control unit sends a vehicle system fault signal to the automatic transmission control unit.

[0022] Optionally, the automatic transmission control unit obtains an abnormal engine speed fault signal from a vehicle system, including:

[0023] The automatic transmission control unit obtains the initial time t0 when the engine enters the start-stop process and the stop time threshold t;

[0024] The automatic transmission control unit obtains the engine speed at time t0+t;

[0025] The automatic transmission control unit determines whether the engine speed is 0;

[0026] If the engine speed is not 0, the automatic transmission control unit determines that the engine speed is abnormal and generates an engine speed abnormality fault signal.

[0027] Optionally, the automatic transmission control unit sends a stop permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process, including:

[0028] The automatic transmission control unit controls the oil pressure of the gear clutch to start decreasing;

[0029] When the oil pressure of the gear clutch drops to the target oil pressure, the automatic transmission control unit controls the electric pump to start and maintain the oil pressure of the gear clutch at the target oil pressure.

[0030] Optionally, after the automatic transmission control unit sends the shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter the start-stop shutdown process, the method further includes:

[0031] The automatic transmission control unit did not obtain the gear clutch risk point;

[0032] The automatic transmission control unit outputs an electric pump on command to maintain the oil pressure of the range clutch until the automatic transmission control unit does not send a stop permission signal.

[0033] According to another aspect of the present application, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements a gear clutch protection method when executing the computer program.

[0034] According to another aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, a gear clutch protection method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a flow chart of a first gear clutch protection method provided according to an embodiment of the present application;

[0036] FIG2 is a schematic diagram of a start-stop process control for a vehicle equipped with a hydromechanical automatic transmission according to an embodiment of the present application;

[0037] FIG3 is a flow chart of a second gear clutch protection method provided according to an embodiment of the present application;

[0038] FIG4 is a flow chart of a third gear clutch protection method provided according to an embodiment of the present application;

[0039] FIG5 is a flow chart of a fourth gear clutch protection method provided according to an embodiment of the present application;

[0040] FIG6 is a flow chart of a fifth gear clutch protection method provided according to an embodiment of the present application;

[0041] 7 is a flow chart of a sixth gear clutch protection method provided according to an embodiment of the present application;

[0042] FIG8 is a flow chart of a seventh gear clutch protection method provided according to an embodiment of the present application;

[0043] FIG9 is a flow chart of an eighth gear clutch protection method provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0045] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. The terms used in this way can be interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 1 is a flow chart of a first gear clutch protection method according to an embodiment of the present application. Figure 2 is a schematic diagram of a start-stop process control method for a vehicle equipped with a hydromechanical automatic transmission according to an embodiment of the present application. The technical solutions of the embodiments of the present application can be applied to protecting the gear clutch in a hydromechanical automatic transmission during engine start-stop conditions. As shown in Figures 1 and 2, the method includes the following steps.

[0047] S10: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0048] The automatic transmission control unit constantly monitors the vehicle's gear position, speed, brake pedal status, transmission oil temperature, shift lever position, and transmission fault conditions. When all conditions meet the engine start-stop requirements, the automatic transmission control unit will send a stop enable signal to the engine control unit, indicating that the engine is ready to stop under this condition; the engine control unit also constantly monitors the vehicle's speed, shift lever position, brake pedal status, and road slope signals. After receiving the stop enable signal sent by the automatic transmission control unit, if all monitoring signals meet the engine start-stop conditions, a stop request signal will be sent to the automatic transmission control unit; after receiving the stop request signal sent by the engine control unit, if the automatic transmission control unit detects that the vehicle is not in the gear shifting process, it will send a stop permission signal to the engine control unit, indicating that the engine can be stopped at this time. After receiving the stop permission signal, the engine control unit controls the engine to enter the start-stop process.

[0049] After entering the engine start-stop process, the oil pressure of the first gear clutch of the hydromechanical automatic transmission begins to drop. When the oil pressure of the first gear clutch drops to the target oil pressure, the automatic transmission control unit controls the electric pump to start and maintain the oil pressure of the first gear clutch at the target oil pressure value. The target oil pressure value depends on the capacity of the electric pump and cannot be adjusted.

[0050] S11. The automatic transmission control unit obtains a gear clutch risk point.

[0051] Among them, the gear clutch risk point may be a vehicle system failure that may cause gear clutch burning during engine start-stop or shutdown, or an abnormal engine speed failure.

[0052] For example, during an engine start-stop operation, if the engine cannot be shut down due to a vehicle system fault, such as a malfunction of the engine crankshaft position sensor, the engine, under the torque-increasing action of the torque converter, will drive the torque converter's turbine to continue rotating, thereby driving the active disc of the first-gear clutch, which is mechanically connected to the rear end of the torque converter's turbine, to continue rotating. Since the engine start-stop operation generally occurs when the vehicle is stopped, the speed of the driven disc of the first-gear clutch is zero. At this time, the first-gear clutch is maintained at the target oil pressure by the electric pump, and the heat capacity of the hydromechanical automatic transmission's clutch is relatively small, which can easily cause the first-gear clutch to burn out. In this case, the engine control unit will identify the vehicle system fault that causes the clutch to burn out and send it to the automatic transmission control unit, or the automatic transmission control unit will identify the abnormal engine speed fault that causes the clutch to burn out. The automatic transmission control unit can obtain the clutch risk point in these two ways.

[0053] S12. The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

[0054] Among them, the gear clutch protection strategy is that the automatic transmission control unit outputs an electric pump shutdown instruction to control the electric pump to shut down.

[0055] The technical solution of the embodiment of the present application can effectively solve the problem of the engine being unable to be shut down during the start-stop process of the engine of a vehicle equipped with a hydromechanical automatic transmission due to a vehicle system failure, thereby causing the gear clutch of the hydromechanical automatic transmission to burn out, by obtaining the gear clutch risk point during the engine start-stop process and outputting the gear clutch protection strategy according to the gear clutch risk point, thereby improving the reliability and safety of the gear clutch. In addition, the technical solution of the embodiment of the present application only needs to improve the control strategy of the engine control unit and the automatic transmission control unit, without adding or changing the hardware structure. The method is simple, practical, highly feasible and low-cost.

[0056] Based on the above embodiment, FIG3 is a flow chart of a second gear clutch protection method provided according to an embodiment of the present application. As shown in FIG2 and FIG3 , the method includes the following steps.

[0057] S20: When the automatic transmission control unit detects that multiple vehicle system signals satisfy the first engine start-stop requirement, the automatic transmission control unit sends a stop enable signal to the engine control unit. After receiving the stop enable signal, the engine control unit determines whether the current vehicle driving state satisfies the second engine start-stop requirement. The vehicle system signal may be one or more signals.

[0058] Among them, the automatic transmission control unit can monitor the vehicle's gear position, speed, brake pedal status, transmission oil temperature, shift lever position and transmission fault conditions in real time. When all conditions meet the vehicle's start-stop requirements, that is, the first start-stop requirement is met, the automatic transmission control unit sends a shutdown enable signal to the engine control unit; the engine control unit also monitors the vehicle's speed, gear lever position, brake pedal status, road slope and other signals at all times. After receiving the shutdown enable signal sent by the automatic transmission control unit, it determines whether the engine start-stop conditions are met based on its own monitoring signal, that is, whether the second start-stop requirement is met.

[0059] S21: If yes, the engine control unit sends a stop request signal to the automatic transmission control unit. After receiving the stop request signal sent by the engine control unit, the automatic transmission control unit determines whether the vehicle is currently in a gear shifting process.

[0060] Among them, when the engine control unit receives the shutdown enable signal sent by the automatic transmission control unit and determines that the vehicle start-stop conditions are met based on its own monitoring signal, the automatic transmission control unit sends a shutdown request signal to the automatic transmission control unit. After receiving the shutdown request signal, the automatic transmission control unit determines whether the vehicle is in the gear shifting process.

[0061] S22: If the vehicle is not in the gear shifting process, the automatic transmission control unit sends a shutdown permission signal to the engine control unit.

[0062] Among them, when the automatic transmission control unit determines that the vehicle is not in the process of shifting gears, it sends a shutdown permission signal to the engine control unit, indicating that the engine can enter the start-stop shutdown process at this time.

[0063] In the normal start-stop state, when the engine control unit determines that the shutdown conditions are not met and the engine needs to be started based on its own monitoring signal, it will no longer send a shutdown request signal to the automatic transmission control unit. At this time, the engine starts the starting process and the engine speed starts to rise; when the engine speed is higher than a certain value, the automatic transmission control unit will no longer send a shutdown permission signal, and at the same time control the electric pump to shut down, and the oil pressure of the first gear clutch is provided by the mechanical pump of the hydromechanical automatic transmission and gradually increases; subsequently, the automatic transmission control unit detects that multiple signal conditions no longer meet the engine start-stop requirements, and stops sending the shutdown enable signal.

[0064] S23: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0065] S24. The automatic transmission control unit obtains a gear clutch risk point.

[0066] S25. The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

[0067] The technical solution of the embodiment of the present application can accurately determine the timing of entering the engine start-stop process and the occurrence of gear clutch risk points through the monitoring of vehicle start-stop conditions and vehicle system failures by the automatic transmission control unit and the engine control unit, thereby ensuring the timeliness of the activation of the gear clutch protection strategy.

[0068] Based on the above embodiment, FIG4 is a flow chart of a third gear clutch protection method provided according to an embodiment of the present application. As shown in FIG2 and FIG4 , the method includes the following steps.

[0069] S30: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0070] S31. The automatic transmission control unit obtains a vehicle system fault signal and / or an abnormal engine speed fault signal in the vehicle system.

[0071] Among them, the vehicle system fault signal may include a crankshaft position sensor fault signal, which may cause the engine to be unable to stop after entering the start-stop process, and then cause the gear clutch to burn; the engine speed abnormal fault signal may be that after entering the engine start-stop process, the engine speed has not dropped to 0 within a certain period of time, causing the gear clutch to burn.

[0072] For example, the engine control unit can constantly monitor vehicle system faults that affect engine start / stop and send a vehicle system fault signal to the automatic transmission control unit. The automatic transmission control unit can also monitor and determine an abnormal engine speed fault signal. After receiving the vehicle system fault signal and / or the abnormal engine speed fault signal, the automatic transmission control unit determines the gear clutch risk point.

[0073] S32. The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

[0074] The technical solution of the embodiment of the present application obtains the vehicle system fault signal and / or the engine speed abnormal fault signal in the vehicle system to identify the gear clutch risk point, so that the gear clutch risk point is monitored in both the engine control unit and the automatic transmission control unit, playing the role of dual redundant protection, which can effectively avoid the risk of the gear clutch being burned and improve the safety of the gear clutch.

[0075] Based on the above embodiment, FIG5 is a flow chart of a fourth gear clutch protection method provided according to an embodiment of the present application. As shown in FIG2 and FIG5 , the method includes the following steps.

[0076] S40: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0077] S41. The automatic transmission control unit obtains a gear clutch risk point.

[0078] S42: The automatic transmission control unit outputs an electric pump off command to control the oil pressure of the gear clutch to drop to 0.

[0079] When the automatic transmission control unit detects a clutch risk point, it outputs an electric pump shutdown command to reduce the clutch oil pressure to zero, thereby preventing clutch erosion. If the automatic transmission control unit doesn't detect a clutch risk point, it doesn't output an electric pump shutdown command, but instead outputs an electric pump startup command, keeping the electric pump on. The technical solution of this embodiment of the application, by identifying clutch risk points and controlling the electric pump, can effectively and timely ensure clutch safety.

[0080] Based on the above embodiment, FIG6 is a flow chart of a fifth gear clutch protection method provided according to an embodiment of the present application. As shown in FIG2 and FIG6 , the method includes the following steps.

[0081] S50: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0082] S51. The engine control unit constantly monitors whether there is a fault in the current vehicle system that affects engine start / stop.

[0083] Among them, the engine control unit always monitors whether there are faults in the current vehicle system that affect the start and stop of the engine, such as a crankshaft position sensor failure, which can cause the gear clutch to burn. In the embodiment of this application, only the crankshaft position sensor failure is taken as an example. The faults that affect the start and stop of the engine can be set according to the vehicle's own conditions, and the embodiment of this application does not limit this.

[0084] S52: If yes, the engine control unit sends a vehicle system fault signal to the automatic transmission control unit.

[0085] Among them, when the engine control unit detects a fault in the current vehicle system that affects the start and stop of the engine, it sends a vehicle system fault signal to the automatic transmission control unit. After receiving the vehicle system fault signal, the automatic transmission control unit identifies it as a gear clutch risk point.

[0086] S53: The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

[0087] The technical solution of the embodiment of the present application, by identifying vehicle system faults that affect engine start-stop and shutdown and activating the gear clutch protection strategy, can avoid the problem of engine failure being unable to shut down due to vehicle system faults, which in turn causes the burning of the first gear clutch of the hydromechanical automatic transmission, and timely and effectively ensure the safety of the gear clutch.

[0088] Based on the above embodiment, FIG7 is a flow chart of a sixth gear clutch protection method provided according to an embodiment of the present application. As shown in FIG2 and FIG7 , the method includes the following steps.

[0089] S60: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0090] S61 : The automatic transmission control unit obtains the initial time t0 when the engine enters the start-stop process and the stop time threshold t.

[0091] Among them, when the engine enters the start-stop process, the automatic transmission control unit immediately obtains the initial time t0 when the engine enters the start-stop process; the stop time threshold t is the time threshold after the engine enters the start-stop process, which can be calibrated and set in the automatic transmission control unit in combination with the durability bench test results of the gear clutch. Among them, the durability bench test of the gear clutch is a test result obtained on a durability test bench during the development process of the hydromechanical automatic transmission under different torques, different speeds and different slip times for the gear clutch to verify the safety and reliability of the gear clutch.

[0092] S62: The automatic transmission control unit obtains the engine speed at time t0+t.

[0093] S63: The automatic transmission control unit determines whether the engine speed is 0.

[0094] Among them, after the engine enters the start-stop process and passes the shutdown time threshold t, if the engine speed drops to 0, there is no risk of ablation of the gear clutch; if the engine enters the start-stop process and passes the shutdown time threshold t, the engine speed has not dropped to 0, it means that the engine speed is abnormal at this time and there is a risk of ablation of the gear clutch. Therefore, the embodiment of the present application determines the gear clutch risk point by obtaining the engine speed at time t0+t.

[0095] S64: If not, the automatic transmission control unit determines that the engine speed is abnormal and generates an engine speed abnormality fault signal.

[0096] Among them, when the engine speed has not dropped to 0 at time t0+t, the automatic transmission control unit determines that there is a risk of ablation of the gear clutch and generates an engine speed abnormality fault signal.

[0097] S65. The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

[0098] The technical solution of the embodiment of the present application, by identifying the engine speed after the engine enters the start-stop process and passes the shutdown time threshold, identifies the gear clutch risk point and activates the gear clutch protection strategy, which can avoid the problem of the first gear clutch of the hydromechanical automatic transmission burning due to the engine speed not dropping to 0 for a long time, and timely and effectively ensure the safety of the gear clutch.

[0099] Based on the above embodiment, FIG8 is a flow chart of a seventh gear clutch protection method provided according to an embodiment of the present application. As shown in FIG2 and FIG8 , the method includes the following steps.

[0100] S70: The automatic transmission control unit controls the oil pressure of the gear clutch to start decreasing.

[0101] Exemplarily, the automatic transmission control unit sends a shutdown permission signal to the engine control unit, the engine control unit controls the engine to enter the start-stop shutdown process, and the automatic transmission control unit controls the oil pressure of the first gear clutch to drop to the target oil pressure, where the target oil pressure is the oil pressure that can be maintained after the electric pump is turned on, which is a relatively low oil pressure value.

[0102] S71. When the oil pressure of the gear clutch drops to the target oil pressure, the automatic transmission control unit controls the electric pump to start and maintain the oil pressure of the gear clutch at the target oil pressure.

[0103] Among them, when the oil pressure of the first gear clutch drops to the target oil pressure, the automatic transmission control unit controls the electric pump to start and maintain the oil pressure of the first gear clutch at the target oil pressure value. The target oil pressure value depends on the capacity of the electric pump and cannot be adjusted to ensure the rapid starting performance of the vehicle engine after starting and stopping.

[0104] S72: The automatic transmission control unit obtains a gear clutch risk point.

[0105] S73: The automatic transmission control unit outputs a gear clutch protection strategy based on the gear clutch risk point.

[0106] The technical solution of the present application can effectively solve the problem of the engine being unable to be shut down during the start-stop process of the engine of a vehicle equipped with a hydromechanical automatic transmission due to a vehicle system failure, thereby causing the gear clutch of the hydromechanical automatic transmission to burn out, by obtaining the gear clutch risk point during the engine start-stop process and outputting the gear clutch protection strategy according to the gear clutch risk point, thereby improving the reliability and safety of the gear clutch. In addition, the technical solution of the embodiment of the present application only needs to improve the control strategy of the engine control unit and the automatic transmission control unit, without adding or changing the hardware structure. The method is simple, practical, highly feasible and low-cost.

[0107] Based on the above embodiment, FIG9 is a flow chart of an eighth gear clutch protection method provided according to an embodiment of the present application. As shown in combination with FIG2 and FIG9 , the method includes the following steps.

[0108] S80: The automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process.

[0109] S81: The automatic transmission control unit does not obtain the gear clutch risk point.

[0110] S82: The automatic transmission control unit outputs an electric pump on command to maintain the oil pressure of the gear clutch until the automatic transmission control unit does not send a stop permission signal.

[0111] When the automatic transmission control unit does not obtain the gear clutch risk point, it does not output the electric pump shutdown command, but still outputs the electric pump startup command. The electric pump remains in the on state to maintain the oil pressure of the gear clutch until the automatic transmission control unit does not send the shutdown permission signal.

[0112] S83: The automatic transmission control unit obtains a gear clutch risk point.

[0113] S84: The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

[0114] The technical solution of the embodiment of the present application does not output the gear clutch protection strategy when it is identified that there is no risk of ablation of the gear clutch, taking into account the safety of the gear clutch and the fast starting performance requirements when the vehicle starts, stops and starts.

[0115] Based on the same concept, an embodiment of the present application also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a gear clutch protection method is implemented.

[0116] The number of processors in the computer device may be one or more; the memory, processor, and computer program stored in the memory and executable on the processor in the computer device may be connected via a bus or other means.

[0117] Memory, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as the gear clutch protection method in the embodiments of the present application. The processor executes the computer program stored in the memory to perform various functional applications and data processing of the computer device, thereby implementing the gear clutch protection method.

[0118] The memory may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal. Furthermore, the memory may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some examples, the memory may include memory remotely located relative to the processor, and such remote memory may be connected to the computer device via a network. Examples of such networks include the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0119] Based on the same concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, a gear clutch protection method is implemented.

[0120] The computer-readable storage medium provided in an embodiment of the present application has computer-executable instructions not limited to the operations of the method described above, but can also perform related operations in the gear clutch protection method provided in any embodiment of the present application. The storage medium can be a non-transitory storage medium.

[0121] Through the above description of the implementation methods, the present application can be implemented with the help of software and general hardware, or it can be implemented by hardware. The technical solution of the present application can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in multiple embodiments of the present application.

[0122] The various forms of processes shown above can be used to reorder, add, or delete steps. For example, the multiple steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This document is not limited here.

[0123] The above embodiments do not limit the scope of protection of this application. Various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors.

Claims

1. A gear clutch protection method, comprising: The automatic transmission control unit sends a stop permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop shutdown process; The automatic transmission control unit acquires a gear clutch risk point; The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point.

2. The method according to claim 1, wherein: Before the automatic transmission control unit sends a shutdown permission signal to the engine control unit and the engine control unit controls the engine to enter a start-stop shutdown process, the method further includes: In response to the automatic transmission control unit monitoring that multiple signals of the vehicle system meet the first engine start-stop requirement, the automatic transmission control unit sends a stop enable signal to the engine control unit, and the engine control unit determines whether the current driving state of the vehicle meets the second engine start-stop requirement after receiving the stop enable signal; In response to the current vehicle driving state satisfying the second engine start-stop requirement, the engine control unit sends a stop request signal to the automatic transmission control unit, and the automatic transmission control unit determines whether the current vehicle is in a gear shifting process after receiving the stop request signal sent by the engine control unit; In response to the current vehicle not being in the gear shifting process, the automatic transmission control unit sends the stop permission signal to the engine control unit.

3. The method according to claim 1, wherein: The automatic transmission control unit acquires the gear clutch risk point, including: The automatic transmission control unit obtains at least one of the following in the vehicle system: a vehicle system fault signal, or an engine speed abnormal fault signal.

4. The method according to claim 1, wherein: The automatic transmission control unit outputs a gear clutch protection strategy according to the gear clutch risk point, including: The automatic transmission control unit outputs an electric pump closing command to control the oil pressure of the gear clutch to drop to 0.

5. The method according to claim 3, wherein: The automatic transmission control unit acquires a vehicle system fault signal in the vehicle system, including: The engine control unit constantly monitors whether there is a fault in the current vehicle system that affects the engine start-stop or shutdown; In response to a fault in the current vehicle system that affects engine start-stop shutdown, the engine control unit sends the vehicle system fault signal to the automatic transmission control unit.

6. The method according to claim 3, wherein: The automatic transmission control unit acquires an abnormal engine speed fault signal in a vehicle system, including: The automatic transmission control unit acquires the initial time t0 and the stop time threshold t of the engine entering the start-stop process; The automatic transmission control unit acquires the engine speed at time t0+t; The automatic transmission control unit determines whether the engine speed is 0; In response to the engine speed not being 0, the automatic transmission control unit determines that the engine speed is abnormal and generates the engine speed abnormality fault signal.

7. The method according to claim 1, wherein: The automatic transmission control unit sends a stop permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop process, including: The automatic transmission control unit controls the oil pressure of the gear clutch to start decreasing; In response to the oil pressure of the range clutch being reduced to a target oil pressure, the automatic transmission control unit controls the electric pump to start and maintain the oil pressure of the range clutch at the target oil pressure.

8. The method according to claim 1, wherein: After the automatic transmission control unit sends a shutdown permission signal to the engine control unit, and the engine control unit controls the engine to enter a start-stop shutdown process, the method further includes: The automatic transmission control unit fails to obtain the gear clutch risk point; The automatic transmission control unit outputs an electric pump on command to maintain the oil pressure of the range clutch until the automatic transmission control unit does not send the stop permission signal.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the gear clutch protection method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, wherein: When the computer program is executed by a processor, the gear clutch protection method according to any one of claims 1 to 7 is implemented.

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