Engine start-stop control method, device, terminal equipment and storage medium

Abstract

The present invention discloses a method, device, terminal equipment and storage medium for controlling the start and stop of an engine. The method comprises the steps of: obtaining a rainfall detection signal of a vehicle; when the rainfall detection signal is greater than or equal to a preset rainfall threshold, controlling the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases; when receiving a wading signal sent by an engine controller, controlling the engine to maintain operation and controlling the generator to stop operation, and turning off the start and stop function of the engine. The present invention can prevent the engine from being flooded when the vehicle performs the engine start and stop action while wading.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engine control, and in particular to an engine start-stop control method, device, terminal equipment and storage medium. Background Art

[0002] With the development of economy, the number of cars in the world has been increasing year by year. From the perspective of energy, the rapid growth of car ownership has posed a severe challenge to energy security and environmental protection. In order to achieve the goal of energy saving and emission reduction, more and more hybrid vehicles have appeared on the market. Hybrid vehicles generally have two power sources. Therefore, during the driving process of the vehicle, according to the vehicle operating status and the driving needs of the driver, the working state of different power sources is adjusted in real time to make the hybrid system operate in different working modes, which is an important part of the energy management of hybrid vehicles.

[0003] Generally speaking, the control system of a hybrid vehicle will automatically control the working mode of the hybrid system according to the actual state of the vehicle and driving requirements, taking into account the working capabilities and energy conversion efficiency of each subsystem. However, when a hybrid vehicle is driving through water on rainy days, if the engine is started and stopped according to the conventional start-stop mode, it is easy for water to enter the engine and be damaged. Therefore, the existing technology lacks intervention in the working mode of the hybrid system for special circumstances in temporary use environments. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to propose an engine start-stop control method, device, terminal equipment and storage medium. By adding rain driving detection and wading driving detection, when driving in rainy days, the engine start-stop control line is adjusted to keep the engine running at low speeds. When driving in wading water, the engine is controlled to maintain operation and the engine start-stop function is turned off to avoid water entering the engine due to the engine start-stop action being performed when the vehicle is driving in wading water.

[0005] To achieve the above object, an embodiment of the present invention provides an engine start-stop control method, comprising the following steps:

[0006] Acquire a rain detection signal of the vehicle, and when the rain detection signal is greater than or equal to a preset rain threshold, control the start and stop of the engine according to a relationship between a state of charge control value in a first power battery state of charge control function preset by the power battery and a current state of charge value of the power battery; wherein the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases;

[0007] When a wading signal sent by an engine controller is received, the engine is controlled to maintain operation, the generator is controlled to stop operation, and the start-stop function of the engine is turned off.

[0008] Preferably, the controlling the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery specifically includes:

[0009] When the current state of charge value of the power battery is greater than or equal to the state of charge control value corresponding to the current vehicle speed, the engine is controlled to stop running;

[0010] When the current state of charge value of the power battery is less than the state of charge control value corresponding to the current vehicle speed, the engine is controlled to start running.

[0011] Preferably, the wading signal is made by the engine controller based on the quantitative relationship between a preset intake pressure threshold corresponding to the engine intake manifold at the current throttle opening and the current engine speed and the current intake pressure value; wherein, when the difference between the current intake pressure value and the intake pressure threshold is less than the preset threshold, the engine controller uses the current intake pressure value as the wading driving flag, and sends a wading signal when the wading driving flag is in the set state or rises from the set state.

[0012] Preferably, the method further comprises:

[0013] When the rainfall detection signal is less than the preset rainfall threshold, timing starts, and if the duration exceeds a preset first duration, the start and stop of the engine is controlled according to the relationship between the state of charge control value in the second power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the second power battery state of charge control function is such that within the preset vehicle speed range, the state of charge control value of the power battery increases with the increase of the vehicle speed; at the same vehicle speed, the state of charge control value corresponding to the second power battery state of charge control function is lower than the state of charge control value corresponding to the first power battery state of charge control function.

[0014] Preferably, the method further comprises:

[0015] When the rainfall detection signal is less than the preset rainfall threshold, the timing starts. If the rainfall detection signal is greater than or equal to the preset rainfall threshold again within the first time period, the timing is reset, and the start and stop of the engine are continued to be controlled according to the relationship between the state of charge control value in the first power battery state of charge control function and the current state of charge value of the power battery.

[0016] Preferably, the method further comprises:

[0017] When a non-wading signal sent by the engine controller is received, timing starts, and if the duration exceeds a preset second time length, the engine start-stop function is restored.

[0018] Preferably, the method further comprises:

[0019] When a non-wading signal sent by the engine controller is received, the timing starts. If the wading signal is received again within the second time period, the timing is reset to zero and the engine is controlled to continue to run.

[0020] The embodiment of the present invention further provides an engine start-stop control device, the device comprising:

[0021] A rainy driving detection module is used to obtain a rainfall detection signal of the vehicle, and when the rainfall detection signal is greater than or equal to a preset rainfall threshold, control the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases;

[0022] The wading driving control module is used to control the engine to maintain operation and the generator to stop operation when receiving the wading signal sent by the engine controller, and to turn off the start-stop function of the engine.

[0023] An embodiment of the present invention also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the engine start-stop control method as described in any one of the above items is implemented.

[0024] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the engine start-stop control method as described in any one of the above.

[0025] Compared with the prior art, an engine start-stop control method, device, terminal equipment and storage medium disclosed in an embodiment of the present invention increase rainy day driving detection and wading water driving detection. When driving in rainy days, the engine start-stop control line is adjusted to keep the engine running at low speeds. When driving in wading water, the engine is controlled to maintain operation and the engine start-stop function is turned off to prevent water from entering the engine due to the engine start-stop action being performed when the vehicle is driving in wading water. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of an embodiment of an engine start-stop control method provided by the present invention;

[0027] Figure 2 It is a schematic diagram of an embodiment of a function image of a first power battery state of charge control function and a second power battery state of charge control function provided by the present invention;

[0028] Figure 3 It is a structural schematic diagram of an embodiment of an engine start-stop control device provided by the present invention;

[0029] Figure 4 It is a structural schematic diagram of an embodiment of a terminal device provided by the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1 , is a flow chart of an embodiment of an engine start-stop control method provided by the present invention, the method comprising steps S1 to S2:

[0032] S1. Obtain a rainfall detection signal of the vehicle, and when the rainfall detection signal is greater than or equal to a preset rainfall threshold, control the start and stop of the engine according to the relationship between the state of charge control value in a first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases;

[0033] S2. When receiving a wading signal sent by an engine controller, the engine is controlled to maintain operation, the generator is controlled to stop operation, and the start-stop function of the engine is turned off.

[0034] It should be noted that the execution subject of the above steps is the vehicle control system. The present invention is mainly aimed at vehicles whose power sources include power batteries, such as electric vehicles and hybrid vehicles. During the operation of such vehicles, it is necessary to maintain the state of charge (SOC) of the power battery within a certain range. How to maintain it and within what range are the core of the energy management of the vehicle control system. In general, in order to reduce energy consumption, the engine is often shut down when the vehicle speed is low, which is often also when the engine efficiency is poor. The basis for shutting down the engine is often based on the power battery SOC. When the power battery SOC is higher than the start-stop line, the engine is shut down. When the power battery SOC is lower than the start-stop line, the engine is started.

[0035] Specifically, the vehicle's rain detector will collect rain detection signals in real time and send them to the vehicle control system. After obtaining the vehicle's rain detection signal, the vehicle control system compares and judges the rain detection signal with the preset rain threshold. When the rain detection signal is greater than or equal to the preset rain threshold, the engine start and stop are controlled according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery. In other words, the preset first power battery state of charge control function is used as the engine start and stop control line; wherein, the first power battery state of charge control function is that within the preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases. The start and stop control line is similar to the score line and pass line in daily life. When the index parameter is higher than the start and stop control line, the engine stops, and when the index parameter is lower than the start and stop control line, the engine starts.

[0036] The above steps are mainly for adjusting the vehicle's engine start-stop control line when driving in rainy days. The following steps are mainly for judging whether to turn off or on the engine's start-stop function according to the water accumulation situation when driving in water.

[0037] If the vehicle is only driven on rainy days or when the humidity is high, and there is no driving on a road with deep water, there will be no substantial direct harm to the engine. There is a risk only when driving on a road with deep water. The aforementioned adjustment of energy management using rainfall is an early identification and prediction of possible water accumulation.

[0038] When receiving the wading signal sent by the engine controller, the engine is controlled to keep running and the generator is controlled to stop running, and the start-stop function of the engine is turned off. The engine is controlled to keep running to avoid water damage due to engine start-stop. The generator is controlled to stop running to reduce the load of the engine, without the burden of driving the generator to power the power battery.

[0039] This embodiment of the present invention provides an engine start-stop control method, which adds rain driving detection and wading driving detection. When driving in the rain, the engine start-stop control line is adjusted to keep the engine running at low speeds. When driving through water, the engine is controlled to maintain operation and the engine start-stop function is turned off to prevent water from entering the engine due to the engine start-stop action being performed when the vehicle is driving through water.

[0040] As an improvement of the above solution, the control of the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery specifically includes:

[0041] When the current state of charge value of the power battery is greater than or equal to the state of charge control value corresponding to the current vehicle speed, the engine is controlled to stop running;

[0042] When the current state of charge value of the power battery is less than the state of charge control value corresponding to the current vehicle speed, the engine is controlled to start running.

[0043] Specifically, when the current state of charge value of the power battery is greater than or equal to the state of charge control value corresponding to the current vehicle speed, the engine is controlled to stop running; when the current state of charge value of the power battery is less than the state of charge control value corresponding to the current vehicle speed, the engine is controlled to start running.

[0044] In order to deepen the understanding, this embodiment of the present invention also provides a functional image diagram of the first power battery state of charge control function and the second power battery state of charge control function, see Figure 2 . Figure 2 The function graph of expresses the relationship between the power battery state of charge control value (also known as power battery SOC) and the vehicle speed. Figure 2 The upper broken line in the figure represents the first power battery state of charge control function, that is, the first value of the engine start-stop SOC control line. Figure 2The broken line below represents the second power battery state of charge control function, that is, the second value of the engine start-stop SOC control line. Generally, when the vehicle is driving on a sunny day and not wading, the vehicle's engine start-stop control line takes the second power battery state of charge control function as the control target, that is, as the vehicle speed increases, the power battery state of charge control value increases accordingly, because the SOC will not change rapidly. In this way, when the SOC is at a certain level, such as SOCa, if the vehicle speed is maintained at Va and driving at a constant speed, the battery SOCa will be maintained at the SOCa level; if the vehicle decelerates and the speed is less than Va, the battery SOC is still at the SOCa position, which is higher than the engine start-stop control line, and the engine will stop at this time; if the vehicle accelerates and the speed is greater than Va, the battery SOC is still at the SOCa position, which is lower than the engine start-stop control line, and the engine will start at this time. In general, the second value of the engine start-stop SOC control line can start the engine at a high speed and stop the engine at a low speed. On the other hand, the first value of the engine start-stop SOC control line, within a certain vehicle speed range, as the vehicle speed increases, the charge state control value of the power battery decreases accordingly, and the battery will always be maintained at a higher SOC level. Generally speaking, the first value of the engine start-stop SOC control line maintains the engine running at low vehicle speeds.

[0045] As an improvement of the above-mentioned scheme, the wading signal is made by the engine controller based on the quantitative relationship between a preset intake pressure threshold corresponding to the engine intake manifold at the current throttle opening and the current engine speed and the current intake pressure value; wherein, when the difference between the current intake pressure value and the intake pressure threshold is less than the preset threshold, the engine controller uses the current intake pressure value as a wading driving flag, and sends a wading signal when the wading driving flag is in a set state or rises from a set state.

[0046] It should be noted that when detecting whether the vehicle is wading, the present invention considers whether the end of the exhaust pipe of the vehicle is covered with water. If it is covered, the intake pressure of the exhaust pipe will change. It can also be determined by installing a liquid state detection sensor on the vehicle chassis or exhaust pipe and detecting the height of the water through the liquid state detection sensor.

[0047] Specifically, the wading signal is made by the engine controller based on the quantitative relationship between a preset intake pressure threshold and a current intake pressure value corresponding to the engine intake manifold at the current throttle opening and the current engine speed; wherein, when the difference between the current intake pressure value of the engine intake manifold and the intake pressure threshold is less than the preset threshold, the engine controller uses the current intake pressure value as the wading driving flag, and sends a wading signal to the vehicle control system when the wading driving flag is in the set state or rises from the set state.

[0048] Generally, the detection of the intake pressure of the exhaust pipe is completed through the engine controller. The engine controller pre-stores the intake pressure threshold values ​​corresponding to the engine's intake manifold at different throttle openings and different engine speeds, and compares the real-time collected pressure value with the pressure threshold value. If the collected pressure value and the pressure threshold value are less than the preset threshold value, it is judged that the vehicle is wading, and the collected pressure value is sent to the vehicle control system as a wading flag.

[0049] As an improvement of the above solution, the method further includes:

[0050] When the rainfall detection signal is less than the preset rainfall threshold, timing starts, and if the duration exceeds a preset first duration, the start and stop of the engine is controlled according to the relationship between the state of charge control value in the second power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the second power battery state of charge control function is such that within the preset vehicle speed range, the state of charge control value of the power battery increases with the increase of the vehicle speed; at the same vehicle speed, the state of charge control value corresponding to the second power battery state of charge control function is lower than the state of charge control value corresponding to the first power battery state of charge control function.

[0051] Specifically, considering the actual application situation, a certain delay should be left for the adjustment of energy management to ensure the reliability of control. When the rainfall detection signal is less than the preset rainfall threshold, the timing starts. If the duration exceeds the preset first duration, the start and stop of the engine is controlled according to the relationship between the state of charge control value in the second power battery state of charge control function preset by the power battery and the current state of charge value of the power battery. In other words, the preset second power battery state of charge control function is used as the start and stop control line of the engine. It is worth noting that within the first duration, the start and stop control line of the engine is still executed according to the first power battery state of charge control function, and is adjusted to the second power battery state of charge control function only after the above conditions are met. Preferably, the first duration is 30 minutes. Among them, the second power battery state of charge control function is that within the preset vehicle speed range, the state of charge control value of the power battery increases with the increase of vehicle speed; at the same vehicle speed, the state of charge control value corresponding to the second power battery state of charge control function is lower than the state of charge control value corresponding to the first power battery state of charge control function, that is, in Figure 2 In the embodiment, the second power battery state of charge control function is located below the first power battery state of charge control function. The process of the engine start-stop control line when executing the second power battery state of charge control function has been described in detail in the above embodiment and will not be repeated here.

[0052] As an improvement of the above solution, the method further includes:

[0053] When the rainfall detection signal is less than the preset rainfall threshold, the timing starts. If the rainfall detection signal is greater than or equal to the preset rainfall threshold again within the first time period, the timing is reset, and the start and stop of the engine are continued to be controlled according to the relationship between the state of charge control value in the first power battery state of charge control function and the current state of charge value of the power battery.

[0054] Specifically, when the rainfall detection signal is less than the preset rainfall threshold, the timing starts. If the rainfall detection signal is greater than or equal to the preset rainfall threshold again within the first time period, the timing is reset, and the engine start and stop are controlled according to the relationship between the state of charge control value in the first power battery state of charge control function and the current state of charge value of the power battery. This means that the vehicle is driving in the rain and the rainfall has not weakened. At this time, the engine start and stop control line needs to be maintained at a high level, that is, the first power battery state of charge control function.

[0055] As an improvement of the above solution, the method further includes:

[0056] When a non-wading signal sent by the engine controller is received, timing starts, and if the duration exceeds a preset second time length, the engine start-stop function is restored.

[0057] Specifically, when the vehicle control system receives the non-wading signal sent by the engine controller, it indicates that the wading driving flag is in a non-set state or is on a falling edge from a set state, and the water level on the road surface may be reduced. The engine controller determines that the vehicle has changed from wading driving to non-wading driving, and sends the non-wading signal to the vehicle control system. The vehicle control system starts timing after receiving the non-wading signal. If the duration exceeds the preset second time length, it indicates that the wading driving danger is eliminated and the engine start-stop function is restored. Preferably, the second time length is 5 minutes. It is worth noting that within the second time length, the vehicle control system still needs to control the engine to maintain the working state and turn off the engine start-stop function. The engine start-stop function is restored only after the above conditions are met.

[0058] As an improvement of the above solution, the method further includes:

[0059] When a non-wading signal sent by the engine controller is received, the timing starts. If the wading signal is received again within the second time period, the timing is reset to zero and the engine is controlled to continue to work.

[0060] Specifically, when the wading driving flag is in the non-set state or on the falling edge from the set state, the engine controller sends a non-wading signal to the vehicle control system. When the vehicle control system receives the non-wading signal sent by the engine controller, it starts timing. If the wading signal is received again within the second time period, it means that the driving flag is in the set state or on the rising edge from the set state. The engine controller determines that the vehicle has changed from non-wading driving to wading driving, and sends the wading signal to the vehicle control system. The vehicle control system resets the timing, controls the engine to continue to run, and does not restore the engine start-stop function.

[0061] As an improvement to the above solution, the vehicle's rain detection signal is collected by the rain sensor of the automatic wiper system or an independent sensor installed on the surface of the vehicle body. The automatic wiper system is connected to the vehicle control system. When the rain sensor collects the rain detection signal, it will be sent to the automatic wiper system, and the automatic wiper system will send it to the vehicle control system, which will make corresponding control instructions. If the rain sensor of the automatic wiper system is used, there is no need to increase the vehicle hardware cost, and the economy is better. If an independent sensor is used, the judgment accuracy can be improved, but the vehicle cost needs to be increased.

[0062] See also Figure 3 , is a schematic structural diagram of an embodiment of an engine start-stop control device provided by the present invention, the device comprising:

[0063] The rainy driving detection module 11 is used to obtain a rain detection signal of the vehicle, and when the rain detection signal is greater than or equal to a preset rain threshold, control the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases;

[0064] The wading driving control module 12 is used to control the engine to maintain operation and the generator to stop operation, and to turn off the start-stop function of the engine when receiving the wading signal sent by the engine controller.

[0065] Preferably, the controlling the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery specifically includes:

[0066] When the current state of charge value of the power battery is greater than or equal to the state of charge control value corresponding to the current vehicle speed, the engine is controlled to stop running;

[0067] When the current state of charge value of the power battery is less than the state of charge control value corresponding to the current vehicle speed, the engine is controlled to start running.

[0068] Preferably, the wading signal is made by the engine controller based on the quantitative relationship between a preset intake pressure threshold corresponding to the engine intake manifold at the current throttle opening and the current engine speed and the current intake pressure value; wherein, when the difference between the current intake pressure value and the intake pressure threshold is less than the preset threshold, the engine controller uses the current intake pressure value as the wading driving flag, and sends a wading signal when the wading driving flag is in the set state or rises from the set state.

[0069] Preferably, the device further comprises:

[0070] A start-stop adjustment module is used to start timing when the rainfall detection signal is less than the preset rainfall threshold value, and if the duration exceeds a preset first duration, control the start and stop of the engine according to the relationship between the state of charge control value in the second power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the second power battery state of charge control function is within the preset vehicle speed range, and the state of charge control value of the power battery increases with the increase of the vehicle speed; at the same vehicle speed, the state of charge control value corresponding to the second power battery state of charge control function is lower than the state of charge control value corresponding to the first power battery state of charge control function.

[0071] Preferably, the device further comprises:

[0072] The first start-stop maintaining module is used to start timing when the rainfall detection signal is less than the preset rainfall threshold value. If the rainfall detection signal is greater than or equal to the preset rainfall threshold value again within the first time period, the timing is reset to zero, and the start-stop of the engine is continued to be controlled according to the relationship between the state of charge control value in the first power battery state of charge control function and the current state of charge value of the power battery.

[0073] Preferably, the device further comprises:

[0074] The start-stop recovery module is used to start timing when receiving a non-wading signal sent by the engine controller, and if the duration exceeds a preset second time length, restore the engine start-stop function.

[0075] Preferably, the device further comprises:

[0076] The second start-stop maintenance module is used to start timing when receiving a non-wading signal sent by the engine controller. If the wading signal is received again within the second time period, the timing is reset to control the engine to continue to run.

[0077] An engine start-stop control device provided in an embodiment of the present invention can implement all processes of the engine start-stop control method described in any of the above embodiments. The functions of each module and unit in the device and the technical effects achieved are respectively the same as the functions and technical effects achieved by the engine start-stop control method described in the above embodiments, and will not be repeated here.

[0078] See also Figure 4 , is a structural diagram of an embodiment of a terminal device provided by the present invention, the terminal device includes a processor 10, a memory 20, and a computer program stored in the memory 20 and configured to be executed by the processor 10, and when the processor 10 executes the computer program, the engine start-stop control method described in any of the above embodiments is implemented.

[0079] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 20 and executed by the processor 10 to complete the present invention. One or more modules / units may be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program in an engine start-stop control method. For example, the computer program may be divided into a rainy driving detection module and a wading driving detection module, and the specific functions of each module are as follows:

[0080] The rainy driving control module 11 is used to obtain a rainfall detection signal of the vehicle, and when the rainfall detection signal is greater than or equal to a preset rainfall threshold, control the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases;

[0081] The wading driving control module 12 is used to control the engine to maintain operation and the generator to stop operation, and to turn off the start-stop function of the engine when receiving the wading signal sent by the engine controller.

[0082] The terminal device may include, but is not limited to, a processor and a memory. Figure 4 It is only an example of a terminal device and does not constitute a limitation of the terminal device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0083] The processor 10 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor 10 may also be any conventional processor, etc. The processor 10 is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0084] The memory 20 can be used to store the computer programs and / or modules. The processor 10 implements various functions of the vehicle-mounted terminal by running or executing the computer programs and / or modules stored in the memory 20 and calling the data stored in the memory 20. The memory 20 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0085] Wherein, if the module integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The above-mentioned computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the above-mentioned computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. Computer-readable media may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0086] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the engine start-stop control method described in any of the above embodiments.

[0087] In summary, the engine start-stop control method, device, terminal equipment and storage medium provided in the embodiments of the present invention adopt the existing hardware conditions of the vehicle to add rainy day driving detection and wading water driving detection functions. When driving in the rain, the engine start-stop control line is adjusted to a higher level, and the engine is kept running at low speed, thereby reducing the risk of the engine shutting down due to falling below the start-stop control line when driving in the rain; when driving in wading water, the engine is controlled to maintain operation, and the engine start-stop function is turned off to prevent the vehicle from performing the engine start-stop action when driving in wading water and causing water to enter the engine. The generator is also prohibited from working, thereby reducing the load on the engine and allowing the engine to charge the power battery without the burden of the generator.

[0088] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for controlling the start and stop of an engine, characterized in that: The following steps are involved: Acquire a rain detection signal of the vehicle, and when the rain detection signal is greater than or equal to a preset rain threshold, control the start and stop of the engine according to a relationship between a state of charge control value in a first power battery state of charge control function preset by the power battery and a current state of charge value of the power battery; wherein the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases; When receiving a wading signal sent by an engine controller, controlling the engine to maintain operation and controlling the generator to stop operation, and turning off the start-stop function of the engine; When the rainfall detection signal is less than the preset rainfall threshold, timing starts, and if the duration exceeds a preset first duration, the start and stop of the engine is controlled according to the relationship between the state of charge control value in the second power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the second power battery state of charge control function is such that within the preset vehicle speed range, the state of charge control value of the power battery increases with the increase of the vehicle speed; at the same vehicle speed, the state of charge control value corresponding to the second power battery state of charge control function is lower than the state of charge control value corresponding to the first power battery state of charge control function.

2. The engine start-stop control method according to claim 1, characterized in that: The controlling the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery specifically includes: When the current state of charge value of the power battery is greater than or equal to the state of charge control value corresponding to the current vehicle speed, the engine is controlled to stop running; When the current state of charge value of the power battery is less than the state of charge control value corresponding to the current vehicle speed, the engine is controlled to start running.

3. The engine start-stop control method according to claim 1, characterized in that: The wading signal is made by the engine controller based on the quantitative relationship between a preset intake pressure threshold corresponding to the engine intake manifold at the current throttle opening and the current engine speed and the current intake pressure value; wherein, when the difference between the current intake pressure value and the intake pressure threshold is less than the preset threshold, the engine controller uses the current intake pressure value as the wading driving flag, and sends a wading signal when the wading driving flag is in a set state or rises from a set state.

4. The engine start-stop control method according to claim 1, characterized in that: The method further comprises: When the rainfall detection signal is less than the preset rainfall threshold, the timing starts. If the rainfall detection signal is greater than or equal to the preset rainfall threshold again within the first time period, the timing is reset, and the start and stop of the engine are continued to be controlled according to the relationship between the state of charge control value in the first power battery state of charge control function and the current state of charge value of the power battery.

5. The engine start-stop control method according to claim 1, characterized in that: The method further comprises: When a non-wading signal sent by the engine controller is received, timing starts, and if the duration exceeds a preset second time length, the engine start-stop function is restored.

6. The engine start-stop control method according to claim 5, characterized in that: The method further comprises: When a non-wading signal sent by the engine controller is received, the timing starts. If the wading signal is received again within the second time period, the timing is reset to zero and the engine is controlled to continue to run.

7. An engine start-stop control device, characterized in that: include: A rainy driving detection module is used to obtain a rainfall detection signal of the vehicle, and when the rainfall detection signal is greater than or equal to a preset rainfall threshold, control the start and stop of the engine according to the relationship between the state of charge control value in the first power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the first power battery state of charge control function is that within a preset vehicle speed range, the state of charge control value of the power battery decreases as the vehicle speed increases; A wading driving control module, used to control the engine to maintain operation and the generator to stop operation, and to turn off the start-stop function of the engine when receiving a wading signal sent by the engine controller; A start-stop adjustment module is used to start timing when the rainfall detection signal is less than the preset rainfall threshold value, and if the duration exceeds a preset first duration, control the start and stop of the engine according to the relationship between the state of charge control value in the second power battery state of charge control function preset by the power battery and the current state of charge value of the power battery; wherein, the second power battery state of charge control function is within the preset vehicle speed range, and the state of charge control value of the power battery increases with the increase of the vehicle speed; at the same vehicle speed, the state of charge control value corresponding to the second power battery state of charge control function is lower than the state of charge control value corresponding to the first power battery state of charge control function.

8. A terminal device, characterized in that: The invention comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the engine start-stop control method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the engine start-stop control method according to any one of claims 1 to 6.

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