Engine start control method, device and electronic equipment for hybrid vehicle

Abstract

The present application relates to a method, device, electronic device, storage medium and computer program product for controlling the engine start of a hybrid vehicle. The method comprises: when the hybrid vehicle is running in a hybrid mode, if it is determined that there is an engine start demand, the engine oil pump is controlled to operate so that the engine oil pump lubricates the engine oil circuit; when the oil pump operation time of the engine oil pump reaches a first preset time threshold, the engine is controlled to start, and the engine speed is controlled not to exceed the speed protection threshold, and the engine start control is completed after the engine speed control ends. The use of this method can prevent the engine damage problem caused by the engine starting.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicle control, and in particular to a method, device, electronic device, storage medium and computer program product for controlling an engine start of a hybrid vehicle. Background Art

[0002] With the development of hybrid vehicle control technology, hybrid vehicles (such as P2-configured hybrid vehicles) may need to start the engine in driving scenarios. However, when a hybrid vehicle has an engine start requirement, directly starting the engine may cause engine damage. Summary of the invention

[0003] Based on this, it is necessary to provide an engine starting control method, device, electronic device, computer-readable storage medium and computer program product for a hybrid vehicle that can prevent engine damage in order to solve the above technical problems.

[0004] In a first aspect, the present application provides a method for controlling engine start of a hybrid vehicle. The method comprises:

[0005] When the hybrid vehicle is running in the hybrid mode, if it is determined that there is a demand for engine starting, the engine oil pump is controlled to operate so that the engine oil pump lubricates the engine oil circuit;

[0006] When the oil pump working time of the engine oil pump reaches a first preset time threshold, the engine is controlled to start, and the speed of the engine is controlled not to exceed a speed protection threshold, and the engine starting control is completed after the speed control of the engine is completed.

[0007] In one embodiment, the method for determining the first preset time threshold includes: determining whether the engine is started for the first time; if the engine is started for the first time, determining the first time as the first preset time threshold; if the engine is not started for the first time, determining the engine shutdown time, determining the second time based on the shutdown time, and determining the second time as the first preset time threshold.

[0008] In one embodiment, controlling the speed of the engine so as not to exceed a speed protection threshold includes: determining a speed protection threshold based on an engine water temperature of the engine; obtaining a motor speed of a motor; and controlling the speed of the engine so as not to exceed the speed protection threshold according to the speed protection threshold and the motor speed.

[0009] In one embodiment, controlling the speed of the engine to not exceed the speed protection threshold according to the speed protection threshold and the motor speed includes:

[0010] If the motor speed is greater than the speed protection threshold, the clutch is controlled to remain in a disengaged state, and when the time for which the clutch remains in a disengaged state reaches a second preset time threshold, the clutch is controlled to close, so as to control the engine speed not to exceed the speed protection threshold.

[0011] In one embodiment, the engine speed is adjusted according to the engine speed threshold and the motor speed, including: if the motor speed is less than or equal to the speed protection threshold, the clutch is controlled to close, and the output torque of the engine and the motor is limited to control the engine speed not to exceed the speed protection threshold. In one embodiment, the current vehicle speed and accelerator pedal opening of the hybrid vehicle are obtained; according to the current vehicle speed and the accelerator pedal opening, it is determined whether to enter the hybrid mode.

[0012] In a second aspect, the present application also provides an engine start control device for a hybrid vehicle. The device comprises:

[0013] A first control module is used for controlling the engine oil pump to operate when the hybrid vehicle is running in the hybrid mode, if it is determined that there is an engine starting demand, so that the engine oil pump lubricates the engine oil circuit;

[0014] The second control module is used to control the starting of the engine when the oil pump working time of the engine oil pump reaches a first preset time threshold, and control the speed of the engine to not exceed the speed protection threshold, and complete the engine starting control after the speed control of the engine is completed.

[0015] In a third aspect, the present application further provides an electronic device, wherein the electronic device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the engine start control method of the hybrid vehicle are implemented.

[0016] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the engine start control method of the hybrid vehicle are implemented. In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the engine start control method of the hybrid vehicle are implemented.

[0017] The engine starting control method, device, electronic device, storage medium and computer program product of the hybrid vehicle mentioned above, when the hybrid vehicle is running in hybrid mode, if it is determined that there is a demand for engine starting, the engine oil pump is controlled to operate so that the engine oil pump lubricates the engine oil circuit; when the oil pump operating time of the engine oil pump reaches a first preset time threshold, the engine is controlled to start, and the engine speed is controlled not to exceed the speed protection threshold, and the engine starting control is completed after the engine speed control is completed. Therefore, when there is a demand for engine starting, by controlling the engine oil pump to operate and controlling the engine speed, the engine can be effectively prevented from being damaged during starting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an application environment diagram of an engine start control method for a hybrid vehicle in one embodiment;

[0019] Figure 2 is a flow chart of an engine start control method for a hybrid vehicle in one embodiment;

[0020] Figure 3 is a structural block diagram of an engine starting control device for a hybrid vehicle in one embodiment;

[0021] Figure 4 FIG. 4 is a diagram showing the internal structure of an electronic device in one embodiment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] The engine start control method of a hybrid vehicle provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown in the figure, Figure 1 The vehicle controller 102, engine 104, clutch 106, motor 108 and engine oil pump 110 are included, wherein the vehicle controller 102 can be connected to the clutch 106, motor 108, engine oil pump 110 and other structural components through a CAN bus communication, so as to control the operation of each structural component.

[0024] Among them, when the hybrid vehicle is running in the pure electric drive mode, the vehicle controller 102 can control the motor 108 to drive the hybrid vehicle to operate. At this time, the clutch 106 remains in a disconnected state. When the hybrid vehicle is running in the hybrid drive mode, the vehicle controller 102 can control the working state of the engine 104, the clutch 106, the motor 108 and the engine oil pump 110 according to whether there is a demand for engine starting to prevent damage to the engine body.

[0025] In one embodiment, when the hybrid vehicle is running in hybrid mode, if the vehicle controller 102 determines that there is a need to start the engine, it controls the engine oil pump to operate so that the engine oil pump lubricates the engine oil circuit; when the oil pump operating time of the engine oil pump reaches a first preset time threshold, it controls the engine to start, and controls the engine speed not to exceed the speed protection threshold, and completes the engine starting control after the engine speed control ends.

[0026] In one embodiment, Figure 2 As shown, a method for controlling the engine start of a hybrid vehicle is provided, and the method is applied to Figure 1 Taking the vehicle controller 102 in FIG. 1 as an example, the method includes the following steps:

[0027] Step S202 : when the hybrid vehicle is running in the hybrid mode, if it is determined that there is a demand for starting the engine, the engine oil pump is controlled to operate so that the engine oil pump lubricates the engine oil circuit.

[0028] Among them, a hybrid vehicle refers to a vehicle whose vehicle drive system is composed of two or more single drive systems that can operate simultaneously. The hybrid mode refers to the two drive modes of a hybrid vehicle during operation: pure electric drive mode and engine drive mode. The engine oil pump refers to a structural component that can increase the engine oil to a certain pressure and then press it onto the moving surfaces of various engine parts. The vehicle controller can achieve oil circuit lubrication of the engine by controlling the operation of the engine oil pump.

[0029] In one of the embodiments, after the hybrid vehicle is powered on at rest, it enters a pure electric driving stage. In the pure electric driving stage, the vehicle controller can determine whether the hybrid vehicle needs to enter the hybrid mode. Specifically, the vehicle controller can obtain the current vehicle speed and accelerator pedal opening of the hybrid vehicle, and then perform a table lookup calculation based on the current vehicle speed and accelerator pedal opening to obtain the table lookup calculation result, and finally determine whether to enter the hybrid mode based on the table lookup calculation result. After entering the hybrid mode, the vehicle controller controls the engine oil pump to operate when it determines that there is a starting demand.

[0030] Step S204, when the oil pump working time of the engine oil pump reaches a first preset time threshold, control the engine to start, and control the engine speed not to exceed the speed protection threshold, and complete the engine starting control after the engine speed control ends.

[0031] Among them, the oil pump working time refers to the time that the engine oil pump lubricates the engine oil circuit, and the first preset time threshold refers to the preset length of time the engine oil pump needs to work. When setting the first preset time threshold, it can be set according to the engine shutdown time, whether it is the first start, etc.

[0032] The speed protection threshold refers to the maximum value that the engine speed can reach in order to prevent damage to the engine body. Therefore, the vehicle controller needs to control the engine speed not to exceed the speed protection threshold. Specifically, the vehicle controller can set a control time when controlling the engine speed not to exceed the speed protection threshold. When the actual time of controlling the engine speed reaches the set control time, it is determined that the engine speed control is ended.

[0033] In one embodiment, the first preset time threshold is 1s (seconds), and the speed protection threshold is 1500 rpm. When the oil pump working time of the engine oil pump reaches 1s, the vehicle controller controls the engine speed not to exceed 1500 rpm. When the vehicle controller controls the engine speed for 2s, the vehicle controller can determine that the engine speed control is completed and complete the engine start control.

[0034] In the engine starting control method of the above-mentioned hybrid vehicle, when the hybrid vehicle is running in the hybrid mode, if it is determined that there is a demand for engine starting, the engine oil pump is controlled to operate so that the engine oil pump lubricates the engine oil circuit; when the oil pump operating time of the engine oil pump reaches a first preset time threshold, the engine is controlled to start, and the engine speed is controlled not to exceed the speed protection threshold, and the engine starting control is completed after the engine speed control is completed. Therefore, when there is a demand for engine starting, by controlling the engine oil pump to operate and controlling the engine speed, the engine can be effectively prevented from being damaged during starting.

[0035] In one embodiment, the method for determining the first preset time threshold includes: determining whether the engine is started for the first time; if the engine is started for the first time, determining the first time as the first preset time threshold; if the engine is not started for the first time, determining the engine shutdown time, determining the second time based on the shutdown time, and determining the second time as the preset time threshold.

[0036] Among them, when the vehicle controller determines whether the engine is started for the first time, it can determine whether the engine of the hybrid vehicle is started for the first time within a certain time period (such as within three days). The specific time period can be adaptively adjusted according to the actual engine operating conditions.

[0037] If the vehicle controller determines that the engine is started for the first time within a certain period of time, the first time can be determined as the first preset time threshold, wherein the first time can be any time value such as 1 second or 2 seconds. If the vehicle controller determines that the engine is not started for the first time within a certain period of time, the vehicle controller can determine the engine shutdown time, determine the second time based on the shutdown time, and determine the second time as the first preset time threshold, wherein the second time can also be any time value such as 1 second or 2 seconds. The first time can be the same as or different from the second time. In this embodiment, the first time is greater than the second time (generally, if the vehicle controller determines that the engine is started for the first time, the engine oil pump will need to work for a relatively longer time).

[0038] In one embodiment, the vehicle controller determines that the engine is not started for the first time, then the vehicle controller determines the engine shutdown time, and then determines the second time in combination with the engine shutdown total time table, wherein the longer the shutdown time is, the longer the engine needs to work.

[0039] In the above embodiment, the vehicle controller determines the time the engine oil pump needs to work according to the actual operation of the engine, thereby effectively achieving oil circuit lubrication and reducing the possibility of engine damage.

[0040] In one embodiment, controlling the speed of the engine so as not to exceed a speed protection threshold includes: determining a speed protection threshold based on an engine water temperature of the engine; obtaining a motor speed of a motor; and controlling the speed of the engine so as not to exceed the speed protection threshold according to the speed protection threshold and the motor speed.

[0041] The engine water temperature refers to the temperature of the water pump in the engine. The vehicle controller can determine the speed protection threshold according to the engine water temperature. Specifically, the vehicle controller can perform a table lookup calculation based on the engine water temperature to determine the speed protection threshold. Generally, the lower the engine water temperature, the lower the engine speed. Therefore, when the engine water temperature is low, the speed protection threshold is also relatively low. The vehicle controller can determine the motor speed of the motor according to the current speed of the hybrid vehicle, and then control the engine speed not to exceed the speed protection threshold through the speed protection threshold and the motor speed.

[0042] In the above embodiment, the vehicle controller determines the speed protection threshold value according to the engine water temperature of the engine, thereby avoiding the situation where the engine water temperature is low and the engine speed is high, causing the engine to work under heavy load and ultimately causing engine damage.

[0043] In one embodiment, controlling the engine speed not to exceed the speed protection threshold according to the speed protection threshold and the motor speed includes: if the motor speed is greater than the speed protection threshold, controlling the clutch to remain in a disengaged state, and when the time for which the clutch remains in a disengaged state reaches a second preset time threshold, controlling the clutch to close, so as to control the engine speed not to exceed the speed protection threshold.

[0044] Among them, the clutch refers to a component that can be directly connected to the engine. The clutch can be used to cut off and connect the power and transmission system. The second preset time threshold refers to the pre-set time for controlling the clutch to remain in a disengaged state. The vehicle controller can compare the motor speed and the speed protection threshold. If the motor speed is greater than the speed protection threshold, it means that the current motor speed is high. If the clutch is closed directly, the engine speed will be pulled to the same speed as the motor speed, causing the engine speed to exceed the speed protection threshold and cause engine damage. Therefore, the vehicle controller controls the clutch to remain in a disengaged state and limits the motor speed. When the time when the clutch remains in a disengaged state reaches the second preset time threshold, the clutch is controlled to close.

[0045] In the above embodiment, the vehicle controller compares the motor speed with the speed protection threshold. When the motor speed is greater than the speed protection threshold, the vehicle controller controls the clutch to remain in a disengaged state. The clutch remains in a disengaged state only when the time reaches a second preset time threshold. The clutch is then controlled to be closed, thereby limiting the engine speed and preventing damage to the engine body.

[0046] In one embodiment, the speed of the engine is adjusted according to the engine speed threshold and the motor speed, including: if the motor speed is less than or equal to the speed protection threshold, controlling the clutch to close and limiting the output torque of the engine and the motor to control the engine speed not to exceed the speed protection threshold.

[0047] Among them, after the vehicle controller compares the motor speed with the speed protection threshold, if the motor speed is less than the speed protection threshold, it means that the current motor speed is relatively low, and the clutch can be directly closed to allow the engine to participate in the power output. At the same time, the vehicle controller limits the output torque of the engine and motor to prevent the engine speed from exceeding the speed protection threshold.

[0048] In one of the embodiments, when the vehicle controller limits the output torque of the engine and the motor, it can use PID (proportional integral differential) for adjustment and control. Specifically, the vehicle controller calculates the speed difference between the current speed and the speed protection threshold based on the current engine speed and the speed protection threshold. If the speed difference is less than the set speed difference threshold, the vehicle controller controls the torque of the engine and the motor to reduce, thereby reducing the vehicle speed, thereby reducing the engine speed.

[0049] In the above embodiment, when the motor speed is less than the speed protection threshold, the vehicle controller directly closes the clutch and limits the torque of the engine and the motor at the same time, so as to control the engine speed not to exceed the speed protection threshold, which can effectively prevent damage to the engine body.

[0050] In one of the embodiments, an implementation method of an engine start control method for a hybrid vehicle in a specific embodiment is as follows:

[0051] The present embodiment involves a hybrid vehicle of P2 configuration, and how to complete the engine start control during vehicle driving. Specifically, starting from the power-on of the hybrid vehicle, the stages are divided into pure electric driving stage, engine lubrication stage, engine protection stage, and engine protection completion stage.

[0052] First, when the hybrid vehicle is stationary and powered on, it enters the pure electric driving stage and starts pure electric driving. During the pure electric driving stage, the vehicle controller can determine whether the hybrid vehicle needs to enter the hybrid mode. The hybrid mode refers to the two driving modes of the hybrid vehicle during operation: pure electric driving mode and engine driving mode.

[0053] Specifically, the vehicle controller can obtain the current vehicle speed and accelerator pedal opening of the hybrid vehicle, and then perform a table lookup calculation based on the current vehicle speed and accelerator pedal opening to obtain the table lookup calculation result, and finally determine whether to enter the hybrid mode based on the table lookup calculation result. After entering the hybrid mode, if the vehicle controller determines that there is a need to start the engine, the hybrid vehicle enters the engine lubrication stage from the pure electric driving stage.

[0054] During the engine lubrication stage, the hybrid vehicle continues to run in pure electric mode, and the engine is in the off state. The vehicle controller controls the engine oil pump to lubricate the engine oil circuit. When the oil pump working time reaches the target time, the engine lubrication stage is switched to the engine protection stage. Among them, the oil pump working time is comprehensively judged based on the engine off time and whether it is not the first start state. Specifically, when the vehicle controller determines whether the engine is started for the first time, it can determine whether the hybrid vehicle's engine is started for the first time within a certain time period (such as within three days). The specific time period can be adaptively adjusted according to the actual engine operation conditions. If the vehicle controller determines that the engine is started for the first time within a certain period of time, the first time can be determined as the first preset time threshold, wherein the first time can be any time value such as 1 second or 2 seconds. If the vehicle controller determines that the engine is not started for the first time within a certain period of time, the vehicle controller can determine the engine shutdown time, determine the second time based on the shutdown time, and determine the second time as the first preset time threshold, wherein the second time can also be any time value such as 1 second or 2 seconds. The first time can be the same as or different from the second time. In this embodiment, the first time is greater than the second time (generally, if the vehicle controller determines that the engine is started for the first time, the engine oil pump will need to work for a relatively longer time).

[0055] In the engine protection stage, the vehicle controller controls the timer to start timing immediately, and within a certain period of time (such as 2 seconds), the engine speed is limited to not exceed the speed protection threshold. Specifically, when limiting the engine speed: first obtain the motor speed (the vehicle controller can determine the motor speed of the motor based on the current speed of the hybrid vehicle). If the motor speed exceeds the speed protection threshold, the clutch is controlled to maintain the disengaged state, and then the clutch is controlled to close after 2 seconds to prevent the engine speed from being the same as the motor speed after the clutch is closed, causing the motor speed to exceed the speed protection threshold. If the motor speed does not exceed the speed protection threshold, the clutch is controlled to close, and then the output torque of the engine and motor is limited to prevent the engine speed from exceeding the speed protection threshold. After 2 seconds, the vehicle controller stops controlling the engine, and the hybrid vehicle switches from the engine protection stage to the engine protection completion stage.

[0056] Among them, the vehicle controller can determine the speed protection threshold value according to the engine water temperature. Specifically, the vehicle controller can perform an engine water temperature lookup table calculation according to the engine water temperature, thereby determining the speed protection threshold value. Generally, the lower the engine water temperature, the lower the engine speed. Therefore, when the engine water temperature is low, the speed protection threshold value is also relatively low.

[0057] When the hybrid vehicle enters the engine protection completion stage, it means that the electric motor of the hybrid vehicle has been started, and the engine speed is no longer limited.

[0058] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0059] Based on the same inventive concept, the embodiment of the present application also provides a hybrid vehicle engine start control device for implementing the hybrid vehicle engine start control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations of one or more hybrid vehicle engine start control device embodiments provided below can refer to the limitations of the hybrid vehicle engine start control method above, and will not be repeated here.

[0060] In one embodiment, Figure 3 As shown, a hybrid vehicle engine start control device is provided, comprising: a first control module and a second control module, wherein:

[0061] The first control module 302 is used for controlling the engine oil pump to operate so as to lubricate the engine oil circuit when the hybrid vehicle is running in the hybrid mode and determining that there is an engine starting demand.

[0062] The second control module 304 is used to control the starting of the engine when the oil pump working time of the engine oil pump reaches a first preset time threshold, and control the speed of the engine not to exceed the speed protection threshold, and complete the engine starting control after the speed control of the engine is completed.

[0063] In one of the embodiments, the apparatus further comprises: a time threshold determination module;

[0064] The time threshold determination module is used to determine whether the engine is started for the first time; if the engine is started for the first time, a first time is determined as a first preset time threshold; if the engine is not started for the first time, a flameout time of the engine is determined, a second time is determined based on the flameout time, and the second time is determined as the first preset time threshold.

[0065] In one of the embodiments, the second control module is used to determine a speed protection threshold based on the engine water temperature of the engine; obtain the motor speed of the motor; and control the speed of the engine not to exceed the speed protection threshold according to the speed protection threshold and the motor speed.

[0066] In one embodiment, the second control module is used to control the clutch to remain in a disengaged state if the motor speed is greater than the speed protection threshold, and to control the clutch to close when the time the clutch remains in a disengaged state reaches a second preset time threshold, so as to control the engine speed not to exceed the speed protection threshold.

[0067] In one embodiment, the second control module is used to control the clutch to close and limit the output torque of the engine and the motor if the motor speed is less than or equal to the speed protection threshold, so as to control the engine speed not to exceed the speed protection threshold.

[0068] In one embodiment, the first control module is further used to obtain the current vehicle speed and accelerator pedal opening of the hybrid vehicle; and determine whether to enter the hybrid mode based on the current vehicle speed and the accelerator pedal opening.

[0069] Each module in the engine start control device of the hybrid vehicle can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in an electronic device in the form of hardware, or can be stored in a memory in the electronic device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0070] In one embodiment, an electronic device is provided. The electronic device may be a vehicle-mounted terminal, and its internal structure diagram may be as follows: Figure 4As shown. The electronic device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities, and the processor includes a vehicle controller. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The communication interface of the electronic device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for controlling the engine start of a hybrid vehicle is implemented.

[0071] Those skilled in the art will understand that Figure 4 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0072] In one embodiment, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of the above-mentioned hybrid vehicle engine start control method when executing the computer program.

[0073] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the engine start control method of the hybrid vehicle are implemented.

[0074] In one embodiment, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the engine start control method of the hybrid vehicle are implemented.

[0075] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0076] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0077] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for controlling engine start of a hybrid vehicle, It is characterized in that The method comprises: When the hybrid vehicle is running in the hybrid mode, if it is determined that there is a demand for engine starting, the engine oil pump is controlled to operate so that the engine oil pump lubricates the engine oil circuit; When the oil pump working time of the engine oil pump reaches a first preset time threshold, the engine is started and the speed of the engine is controlled not to exceed a speed protection threshold, and the engine start control is completed after the speed control of the engine ends; Wherein, controlling the speed of the engine to not exceed a speed protection threshold comprises: determining a speed protection threshold based on an engine water temperature of the engine; Get the motor speed of the motor; If the motor speed is greater than the speed protection threshold, the clutch is controlled to remain in a disengaged state, and when the time for which the clutch remains in the disengaged state reaches a second preset time threshold, the clutch is controlled to close, so as to control the engine speed not to exceed the speed protection threshold; If the motor speed is less than or equal to the speed protection threshold, the clutch is controlled to close, and the output torque of the engine and the motor is limited to control the engine speed not to exceed the speed protection threshold.

2. The method according to claim 1, It is characterized in that The method for determining the first preset time threshold includes: determining whether the engine is started for the first time; If the engine is started for the first time, the first time is determined as a first preset time threshold; If the engine is not started for the first time, a flameout time of the engine is determined, a second time is determined according to the flameout time, and the second time is determined as a first preset time threshold.

3. The method according to claim 1, It is characterized in that The method further comprises: Obtaining the current vehicle speed and accelerator pedal opening of the hybrid vehicle; Whether to enter the hybrid power mode is determined according to the current vehicle speed and the accelerator pedal opening.

4. An engine starting control device for a hybrid vehicle, It is characterized in that The device comprises: A first control module is used for controlling the engine oil pump to operate when the hybrid vehicle is running in the hybrid mode, if it is determined that there is an engine starting demand, so that the engine oil pump lubricates the engine oil circuit; a second control module, configured to control starting the engine when the oil pump operation time of the engine oil pump reaches a first preset time threshold, and control the speed of the engine not to exceed a speed protection threshold, and complete the engine starting control after the speed control of the engine ends; The second control module is also used to determine a speed protection threshold based on the engine water temperature of the engine; obtain the motor speed of the motor; if the motor speed is greater than the speed protection threshold, control the clutch to remain in a disengaged state, and when the time for which the clutch remains in a disengaged state reaches a second preset time threshold, control the clutch to close, so as to control the engine speed not to exceed the speed protection threshold; if the motor speed is less than or equal to the speed protection threshold, control the clutch to close, and limit the output torque of the engine and the motor, so as to control the engine speed not to exceed the speed protection threshold.

5. The device according to claim 4, It is characterized in that The device also includes: a time threshold determination module; The time threshold determination module is used to determine whether the engine is started for the first time; if the engine is started for the first time, a first time is determined as a first preset time threshold; if the engine is not started for the first time, a flameout time of the engine is determined, a second time is determined based on the flameout time, and the second time is determined as the first preset time threshold.

6. The device according to claim 4, It is characterized in that The first control module is further used to obtain the current vehicle speed and accelerator pedal opening of the hybrid vehicle; and determine whether to enter the hybrid mode according to the current vehicle speed and the accelerator pedal opening.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, It is characterized in that When the processor executes the computer program, the steps of the method according to any one of claims 1 to 3 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

9. A computer program product comprising a computer program, It is characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

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