Engine starting method and device and storage medium

Abstract

The invention discloses an engine starting method and device and a storage medium, and the method comprises the steps that in response to an engine starting failure, whether the engine starting failure is caused by engine carbon deposition and / or cylinder flooding or not is detected according to a fault detection result of an engine; and in response to the situation that the engine starting failure is caused by engine carbon deposition and / or cylinder flooding, carbon cleaning and / or cylinder cleaning treatment are / is conducted on the engine, so that the starting success rate of the next time of engine is increased. In this way, the engine carbon deposition and / or cylinder flooding problem can be detected in time.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular, to an engine starting method, device, and storage medium. Background Art

[0002] Under low-temperature environmental conditions or in scenarios where users frequently make short trips, the engine often needs to maintain a high-frequency and intermittent operating state for a long time. This special operating mode is extremely likely to cause carbon deposits to form on the spark plug, which in turn has an adverse effect on the ignition energy. In severe cases, it may even trigger a flooded cylinder fault, ultimately resulting in the engine being unable to start normally.

[0003] At present, there is no mature and effective technical means to detect engine carbon deposits and / or flooded cylinders in a timely manner. Due to the lack of this detection ability, it is impossible to properly handle engine carbon deposits and / or flooded cylinders at the first time when the problem occurs. The problems caused by the untimely treatment of engine carbon deposits and / or flooded cylinders will directly lead to frequent failures during engine startup. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide an engine starting method, device, and storage medium that can detect engine carbon deposits and / or flooded cylinder problems in a timely manner.

[0005] To solve the above technical problem, one technical solution adopted by the present application is: to provide an engine starting method, the method includes: in response to the failure of the current engine startup, using the engine's fault detection result, detecting whether the engine startup failure is caused by engine carbon deposits and / or flooded cylinders; in response to the engine startup failure being caused by engine carbon deposits and / or flooded cylinders, performing carbon cleaning and / or cylinder cleaning on the engine to improve the startup success rate of the next engine startup.

[0006] Among them, the engine's fault detection result includes: the detection result of whether there is a component-level fault in the engine; using the engine's fault detection result, detecting whether the engine startup failure is caused by engine carbon deposits and / or flooded cylinders includes: if there is no component-level fault in the engine, determining that the engine startup failure is caused by engine carbon deposits and / or flooded cylinders.

[0007] Among them, the component-level fault includes at least one of an injector fault and an open circuit in the ignition coil.

[0008] Among them, before performing carbon cleaning and / or cylinder cleaning on the engine, the method further includes: detecting whether the vehicle meets the cleaning requirements; if the vehicle meets the cleaning requirements, performing the step of carbon cleaning and / or cylinder cleaning on the engine.

[0009] Among them, the cleaning requirements include at least one of the following: the energy available in the vehicle is greater than the energy required for carbon cleaning and / or cylinder cleaning; the vehicle is in a safe state; the vehicle is in a driving state.

[0010] Among them, the vehicle is an extended-range electric vehicle or a hybrid vehicle; and / or, the available energy is provided by a power battery in the vehicle.

[0011] Among them, performing carbon cleaning and / or cylinder cleaning on the engine includes: prohibiting the engine from injecting fuel; controlling the generator of the vehicle to drive the engine to rotate for a preset time; an air flow can be formed during the rotation of the engine, and the air flow is used to remove carbon deposits and / or unburned mixture in the engine cylinder.

[0012] Among them, this method is executed by a vehicle controller; and / or, this method further includes: obtaining the engine speed change rate and the torque change rate of the vehicle generator; determining whether the engine fails to start based on the speed change rate and the torque change rate.

[0013] To solve the above technical problems, another technical solution adopted by this application is: providing an electronic device, including a memory and a processor that are mutually coupled, and the memory stores program instructions; the processor is used to execute the program instructions stored in the memory to implement the above method.

[0014] To solve the above technical problems, another technical solution adopted by this application is: providing a computer-readable storage medium for storing program instructions, and the program instructions can be executed to implement the above method.

[0015] In the above solution, when the engine fails to start this time, the fault detection result of the engine can be used to detect whether the engine fails to start due to engine carbon deposits and / or cylinder flooding, and when the detection result indicates that it is caused by engine carbon deposits and / or cylinder flooding, carbon cleaning and / or cylinder cleaning are performed on the vehicle engine to improve the starting success rate of the next engine. Compared with the traditional method of disassembling the spark plug or disassembling the cylinder for visual inspection, the detection method using the fault detection result of the engine in this application is more efficient, can realize the timely detection of the engine carbon deposit and / or cylinder flooding condition, and thus can improve the starting success rate of the next engine by timely performing carbon cleaning and / or cylinder cleaning on the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic flowchart of an embodiment of the engine starting method provided by this application;

[0017] Figure 2 is Figure 1 a schematic flowchart of an embodiment of the step S12 shown;

[0018] Figure 3It is a framework diagram of the vehicle provided by this application;

[0019] Figure 4 It is a framework schematic diagram of an embodiment of the engine starting device provided by this application;

[0020] Figure 5 It is a framework schematic diagram of an embodiment of the electronic device provided by this application;

[0021] Figure 6 It is a framework schematic diagram of the computer-readable storage medium provided by this application. Detailed implementation manners

[0022] To make the objectives, technical solutions and effects of this application clearer and more definite, the following further describes this application in detail with reference to the accompanying drawings and by way of examples.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of this application, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] It should be noted that the inventor found during the research process that in a low-temperature environment (for example, the ambient temperature ≤ -10°C) or a high-frequency short-distance driving scenario (for example, the single-trip mileage < 5 km or 10 km), the internal combustion engine system is in a high-frequency intermittent operation state for a long time. In this operating condition, it is very easy to cause carbon deposition at the spark plug part, which in turn affects the ignition energy. In serious cases, it may even cause a flooded cylinder failure, resulting in the engine being unable to start normally.

[0025] At present, the traditional detection method relies on manual visual inspection of the spark plug carbon deposition or disassembly of the cylinder pressure sensor for measurement, which cannot achieve real-time monitoring (for example, the response delay > 24 hours), and the misjudgment rate is relatively high.

[0026] Although there are currently also methods for indirectly detecting engine carbon deposition and / or flooded cylinders using sensors, in a low-temperature environment, the sensor signal noise is large and the misjudgment rate is relatively high, resulting in a phenomenon where the actual condition of the engine does not match the detection result. For example, although there is actually engine carbon deposition and / or a flooded cylinder phenomenon in the engine, the detection result shows that there is no engine carbon deposition and / or a flooded cylinder in the engine.

[0027] To solve the above problems, the present application provides an engine starting method, device, and storage medium. Specifically as follows:

[0028] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of an embodiment of the engine starting method provided by the present application. It should be noted that if there are substantially the same results, this embodiment is not limited to Figure 1 the process sequence shown. As Figure 1 shown, this embodiment includes:

[0029] S11: In response to the failure of the current engine start, use the engine fault detection result to detect whether the engine start failure is caused by engine carbon deposition and / or cylinder flooding.

[0030] This embodiment is used to detect whether the current engine start failure is caused by engine carbon deposition and / or cylinder flooding by using the engine fault detection result, so as to be able to timely detect that the current engine start failure is caused by engine carbon deposition and / or cylinder flooding, and then be able to improve the success rate of the next engine start by performing carbon cleaning and / or cylinder cleaning on the engine.

[0031] In one embodiment, the method of troubleshooting the engine can be used to detect whether the current engine start failure is caused by engine carbon deposition and / or cylinder flooding.

[0032] In one implementation, the engine fault detection result includes: the detection result of whether there is a component-level fault in the engine. For example, whether there is a fuel injector fault in the engine, and / or whether there is an open circuit in the ignition coil, etc. That is, in this implementation, the component-level fault includes at least one of a fuel injector fault and an open circuit in the ignition coil.

[0033] Among them, if there is no component-level fault in the engine, it is determined that the current engine start failure is caused by engine carbon deposition and / or cylinder flooding.

[0034] In another implementation, the engine fault detection result includes, in addition to the above detection result of component-level faults, the abnormal detection result of other components or conditions that can cause engine start failure, and when it is determined that there is neither a component-level fault nor an abnormal detection result of other components or conditions, it is determined that the current engine start failure is caused by engine carbon deposition and / or cylinder flooding.

[0035] In one embodiment, it is possible to determine whether the engine starts successfully based on the engine speed change rate and the torque change rate of the vehicle generator. Specifically: the engine speed change rate and the torque change rate of the vehicle generator can be obtained first, and then based on the speed change rate and the torque change rate, it is determined whether the engine starts successfully.

[0036] It should be noted that as long as the engine starts ignition, the energy generated by the ignition will be reflected in the engine speed and the generator torque, that is, the engine ignition can cause changes in the engine speed and the generator torque. Therefore, it is possible to determine whether the engine startup fails according to the respective change rates corresponding to the engine speed and the generator torque.

[0037] S12: In response to the engine startup failure being caused by engine carbon deposition and / or cylinder flooding, perform carbon cleaning and / or cylinder cleaning on the engine to improve the startup success rate of the next engine startup.

[0038] In this embodiment, when it is determined that the engine startup failure is caused by engine carbon deposition and / or cylinder flooding, in order to improve the startup success rate of the next engine startup, carbon cleaning and / or cylinder cleaning can be performed on the engine to reduce the carbon deposition amount at the engine spark plug and / or reduce the unburned mixture in the cylinder.

[0039] In a preferred embodiment, before performing carbon cleaning and / or cylinder cleaning on the engine in step S12, it is possible to detect whether the current vehicle conditions of the vehicle meet the cleaning requirements. Only when the vehicle fully meets the cleaning requirements will the step of performing carbon cleaning and / or cylinder cleaning on the engine be executed.

[0040] Specifically, the cleaning requirements include at least one of the following:

[0041] First, energy sufficiency requirement: The available energy of the vehicle must be greater than the energy consumed for carbon cleaning and / or cylinder cleaning.

[0042] Second, safety state requirement: The vehicle needs to be in a safe state without any risk factors that may affect operation safety.

[0043] Third, driving state requirement: The vehicle is in a driving state to avoid the noise generated by carbon cleaning and / or cylinder cleaning in the parking state from affecting the user's driving experience.

[0044] The following is an explanation of the reasons for setting each cleaning requirement:

[0045] The core purpose of setting the energy sufficiency requirement as a cleaning requirement is to ensure that the vehicle has sufficient energy reserves to support the smooth progress of the carbon cleaning and / or cylinder cleaning process. If the energy that the vehicle can provide is less than or equal to the energy required for the treatment, it means that the current energy level of the vehicle is not sufficient to support the carbon cleaning and / or cylinder cleaning operation of the engine under normal operating conditions, and it may even affect the normal operation of other functions of the vehicle and even cause the vehicle to malfunction. In this case, to avoid abnormal vehicle operation, it will be determined that the engine start fails and a corresponding prompt will be given; on the contrary, if the energy that the vehicle can provide is greater than the energy required for the carbon cleaning and / or cylinder cleaning process, it means that the current energy level of the vehicle is sufficient to support the carbon cleaning and / or cylinder cleaning operation of the engine under normal operating conditions.

[0046] In some implementation scenarios, the vehicle is a range-extended electric vehicle or a hybrid vehicle. Among them, a power battery is equipped in this type of vehicle, and the energy that the above vehicle can provide can be provided by the power battery in the vehicle.

[0047] The core purpose of setting the safety status requirement as a cleaning requirement is to maximize the overall safety of the vehicle during the carbon cleaning and / or cylinder cleaning process. If the vehicle is currently in an unsafe state with potential safety hazards, such as having relatively serious fault problems, the carbon cleaning and / or cylinder cleaning operation of the engine is strictly prohibited. Only when the vehicle is confirmed to be in a safe state can it enter step S12 to perform relevant processing. The main reason is that the carbon cleaning and / or cylinder cleaning process may affect some systems of the vehicle. If the vehicle itself has safety risks, the processing process may exacerbate the risks and cause safety accidents. Therefore, it is required that the vehicle be in a safe state to ensure the safety of the processing process.

[0048] Setting the driving status requirement as a cleaning requirement is mainly based on considerations of the user's driving experience. If the engine is carbon cleaned and / or cylinder cleaned when the vehicle is in a parked state, the noise generated during the processing will seriously affect the user's driving experience. When the vehicle is in a driving state, the vehicle itself will generate a certain amount of environmental noise, and the noise generated during the processing at this time is relatively easy to be masked, thus reducing the impact on the user. Therefore, it is required to perform relevant processing when the vehicle is in a driving state with a certain vehicle speed to reduce the adverse impact on the user.

[0049] In one embodiment, please refer to Figure 2 , Figure 2 is Figure 1 a schematic flowchart of one embodiment of step S12 as shown. As Figure 2 shown, the carbon cleaning and / or cylinder cleaning process of step S12 for the engine further includes:

[0050] S21: Prohibit the engine from injecting fuel.

[0051] Among them, during the carbon cleaning and / or cylinder cleaning process, fuel injection of the engine is prohibited, mainly to avoid new carbon deposits or unburned mixture generated by new fuel, thus interfering with the cleaning effect. The specific reasons include: if the engine continuously injects fuel, the carbon deposits generated after the combustion of the new fuel will cover the cleaned surface, and the unburned fuel after fuel injection may remain in the cylinder, resulting in the failure of the cleaning work.

[0052] S22: Control the vehicle's generator to drive the engine to rotate for a preset time; during the rotation of the engine, an air flow can be formed, and the air flow is used to remove carbon deposits and / or unburned mixture in the engine cylinder.

[0053] In this embodiment, during the process of controlling the vehicle's generator to drive the engine to rotate, energy that can make it rotate needs to be provided to the generator so that during the rotation of the generator, it can drive the engine that has a connection relationship with it to rotate.

[0054] In some embodiments, the vehicle is an extended-range electric vehicle or a hybrid vehicle. Such vehicle types are equipped with a power battery, and the power battery can provide energy for the generator.

[0055] Of course, in some embodiments, an external power source can also be set to drive the generator to rotate.

[0056] It should be noted that if the air flow formed during the rotation of the engine can smoothly remove the carbon deposits on the spark plug and / or the unburned mixture in the engine cylinder, it is necessary to control the rotation speed of the generator driving the engine to reach a relatively high level and rotate for a certain time. The specific rotation speed and rotation time can be determined according to the cleaning effect of the air flow on the carbon deposits and / or the unburned mixture in the cylinder and / or the starting success rate of the engine next time. For example, the rotation speed is 1400 - 3000 revolutions per unit time, and it rotates for 30 seconds, etc. However, the rotation speed cannot be too high because it will affect the driver's subjective driving experience.

[0057] In the above solution, when the engine fails to start this time, the fault detection result of the engine can be used to detect whether the engine start failure is caused by engine carbon deposits and / or cylinder flooding. And when the detection result shows that it is caused by engine carbon deposits and / or cylinder flooding, carbon cleaning and / or cylinder cleaning treatment is performed on the vehicle engine to improve the starting success rate of the engine next time. Compared with the traditional method of disassembling the spark plug or the cylinder and then performing visual inspection, the detection method using the fault detection result of the engine in this application is more efficient, can realize the timely detection of the engine carbon deposits and / or cylinder flooding conditions, and thus can improve the starting success rate of the engine next time by timely performing carbon cleaning and / or cylinder cleaning treatment on the engine.

[0058] In one embodiment, the execution subject of the above engine starting method is the vehicle control unit. Taking a range-extended electric vehicle as an example, the starting method for improving the starting success rate of the range-extended vehicle engine is briefly described as follows:

[0059] Specifically, please refer to Figure 3 , Figure 3 which is the framework diagram of the vehicle provided by this application. As Figure 3 shown, the vehicle includes an engine, a generator, a power battery, and a rear drive motor, as well as an engine controller, a generator controller, and a vehicle control unit. Among them, each component realizes energy transmission and signal control through high-voltage lines and CAN buses.

[0060] Among them, the engine controller is used to manage fuel injection, and the engine drives the generator to generate electricity through the mechanical energy generated by burning fuel; the generator is used to convert the mechanical energy of the engine into electrical energy and transmit it to the power battery and the drive motor through high-voltage lines; the power battery is interconnected with the generator and the rear drive motor through high-voltage lines to support bidirectional energy flow.

[0061] The vehicle control unit is communicatively connected to the engine controller, the generator controller, and the power battery through CAN. The vehicle control unit can detect whether there is an abnormality in the vehicle based on the signals fed back by each component, such as detecting whether there is a component-level fault in the engine, the remaining power or state of charge of the power battery, etc. The vehicle control unit can also send instructions to the engine controller, the generator controller, etc. to achieve control of the engine, the generator, etc.

[0062] In a specific embodiment, the engine starting method includes the following steps:

[0063] 1. Each time the engine is started, the engine controller determines whether the engine is successfully started this time through the engine speed change rate and the generator torque change rate.

[0064] 2. When it is monitored that the engine starting fails, at this time, the engine controller sends the starting failure flag bit to the vehicle control unit.

[0065] 3. After receiving the starting failure flag bit, the vehicle control unit synchronously determines whether there is a component-level fault code in the engine at this time. If so, it is considered that there is other fault in the engine causing the starting failure, and a starting failure is prompted on the instrument / dashboard to notify the user.

[0066] 4. If there is no fault code in the engine, the vehicle control unit determines whether the vehicle conditions (power battery SOC, vehicle safety state, and operating state) meet the requirements at this time. If they meet, it enters the cylinder cleaning mode (performing carbon cleaning and / or cylinder cleaning on the engine). If the vehicle conditions are not met, a starting failure of the engine is prompted.

[0067] Among them, the cylinder cleaning mode includes: the vehicle controller sends a start command to the engine controller and the generator controller, and simultaneously sends a fuel injection prohibition command to the engine controller. The generator drives the engine to rotate to a certain speed and maintains for a period of time. At this time, a large amount of air flow enters the cylinder, discharging the unburned mixture in the cylinder. At the same time, the air flow can blow the spark plug, which can reduce the degree of carbon deposition and improve the success rate of the next start.

[0068] Please refer to Figure 4 , Figure 4 FIG. Figure 4 is a schematic framework diagram of an embodiment of the engine starting device provided by the present application. In this embodiment, the engine starting device 40 includes a detection module 41 and a processing module 42. The detection module 41 is configured to, in response to the failure of the current engine start, use the engine fault detection result to detect whether the engine start failure is caused by engine carbon deposition and / or flooded cylinder; the processing module 42 is configured to, in response to the engine start failure being caused by engine carbon deposition and / or flooded cylinder, perform carbon cleaning and / or cylinder cleaning on the engine to improve the success rate of the next engine start.

[0069] In some embodiments, the engine fault detection result includes: the detection result of whether there is a component-level fault in the engine; the detection module 41 uses the engine fault detection result to detect whether the engine start failure is caused by engine carbon deposition and / or flooded cylinder, including: if there is no component-level fault in the engine, it is determined that the engine start failure is caused by engine carbon deposition and / or flooded cylinder.

[0070] In some embodiments, the component-level fault includes at least one of an injector fault and an open circuit in the ignition coil.

[0071] In some embodiments, before the processing module 42 performs carbon cleaning and / or cylinder cleaning on the engine, it further includes: detecting whether the vehicle meets the cleaning requirements; if the vehicle meets the cleaning requirements, performing the step of carbon cleaning and / or cylinder cleaning on the engine.

[0072] In some embodiments, the cleaning requirements include at least one of the following: the available energy of the vehicle is greater than the energy required for carbon cleaning and / or cylinder cleaning; the vehicle is in a safe state; the vehicle is in a driving state.

[0073] In some embodiments, the vehicle is an extended-range electric vehicle or a hybrid vehicle; and / or, the available energy is provided by the power battery in the vehicle.

[0074] In some embodiments, the processing module 42 performs carbon cleaning and / or cylinder cleaning on the engine, including: prohibiting the engine from injecting fuel; controlling the generator of the vehicle to drive the engine to rotate for a preset time; an air flow can be formed during the rotation of the engine, and the air flow is used to remove carbon deposits or remove the unburned mixture in the engine cylinder.

[0075] In some embodiments, the engine starting device 40 further includes a determining module 43. The determining module 43 is configured to obtain the engine speed change rate and the torque change rate of the vehicle generator; and determine whether the engine fails to start based on the speed change rate and the torque change rate.

[0076] Please refer to Figure 5 , Figure 5 which is a schematic framework diagram of an embodiment of the electronic device provided in the present application. In this embodiment, the electronic device 50 includes a memory 51 and a processor 52 that are coupled to each other.

[0077] The memory 51 stores program instructions. The processor 52 is configured to execute the program instructions stored in the memory 51 to implement the steps of any of the above method embodiments. In a specific implementation scenario, the electronic device 50 may include, but is not limited to: a microcomputer, a server. In addition, the electronic device 50 may also include mobile devices such as a laptop computer, a tablet computer, etc., which are not limited herein.

[0078] Specifically, the processor 52 is configured to control itself and the memory 51 to implement the steps of any of the above embodiments. The processor 52 may also be referred to as a CPU (Central Processing Unit). The processor 52 may be an integrated circuit chip with signal processing capabilities. The processor 52 may also be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. Additionally, the processor 52 may be implemented jointly by integrated circuit chips.

[0079] Please refer to Figure 6 , Figure 6It is a schematic framework diagram of the computer-readable storage medium provided by this application. The computer-readable storage medium 60 of the embodiments of this application stores program instructions 61. When the program instructions 61 are executed, the methods provided by any one of the above-mentioned embodiments and any non-conflicting combinations are implemented. Among them, the program instructions 61 can form a program file and be stored in the above-mentioned computer-readable storage medium 60 in the form of a software product, so that a computer device (which can be a personal computer, a server, or a network device, etc.) can execute all or part of the steps of the methods of various embodiments of this application. The aforementioned computer-readable storage medium 60 includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs, or terminal devices such as computers, servers, mobile phones, and tablets.

[0080] In the above solution, when the engine fails to start this time, the fault detection result of the engine can be used to detect whether the engine start failure is caused by engine carbon deposition and / or cylinder flooding. And when the detection result is that it is caused by engine carbon deposition and / or cylinder flooding, the vehicle engine is carbon-cleaned and / or cylinder-cleaned to improve the starting success rate of the next engine start. Compared with the traditional method of visually inspecting after removing the spark plug or removing the cylinder, the detection method using the fault detection result of the engine in this application is more efficient, can realize the timely detection of the engine carbon deposition and / or cylinder flooding condition, and then can improve the starting success rate of the next engine start by timely carbon-cleaning and / or cylinder-cleaning the engine.

[0081] In some embodiments, the functions or modules included in the device provided by the embodiments of the present disclosure can be used to execute the methods described in the above method embodiments. The specific implementation can refer to the description of the above method embodiments. For the sake of brevity, it will not be repeated here.

[0082] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. Their similarities or similarities can be referred to each other. For the sake of brevity, they will not be repeated in this article.

[0083] In several embodiments provided in the present application, it should be understood that the disclosed methods and apparatuses can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections between each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0084] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0085] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0086] If the integrated unit 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 this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0087] The above is only the embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present application.

Claims

1. An engine starting method, characterized in that, The method includes: In response to the failure of the current engine startup, using the engine's fault detection results, detecting whether the engine startup failure is caused by engine carbon deposition and / or cylinder flooding; In response to the engine startup failure being caused by the engine carbon deposition and / or cylinder flooding, performing carbon cleaning and / or cylinder cleaning on the engine to improve the startup success rate of the next engine startup.

2. The method according to claim 1, wherein The engine's fault detection results include: the detection results of whether there are component-level faults in the engine; Using the engine's fault detection results to detect whether the engine startup failure is caused by engine carbon deposition and / or cylinder flooding includes: If there are no component-level faults in the engine, determining that the engine startup failure is caused by engine carbon deposition and / or cylinder flooding.

3. The method according to claim 2, characterized in that, The component-level faults include at least one of an injector fault and an open circuit in the ignition coil.

4. The method according to claim 1, characterized in that, Before performing the carbon cleaning and / or cylinder cleaning on the engine, the method further includes: Detecting whether the vehicle meets the cleaning requirements; If the vehicle meets the cleaning requirements, performing the step of performing carbon cleaning and / or cylinder cleaning on the engine.

5. The method according to claim 4, characterized in that The cleaning requirements include at least one of the following: The available energy of the vehicle is greater than the energy required for the carbon cleaning and / or cylinder cleaning; The vehicle is in a safe state; The vehicle is in a driving state.

6. The method according to claim 5, wherein The vehicle is an extended-range electric vehicle or a hybrid vehicle; And / or, the available energy is provided by the power battery in the vehicle.

7. The method according to claim 1 or 4, characterized in that, Performing carbon cleaning and / or cylinder cleaning on the engine includes: Prohibiting fuel injection of the engine; Controlling the vehicle's generator to drive the engine to rotate for a preset time; an air flow can be formed during the rotation of the engine, and the air flow is used to remove carbon deposition and / or remove the unburned mixture in the engine cylinder.

8. The method according to claim 1, wherein The method is executed by the vehicle control unit; And / or, the method further includes: Obtaining the engine speed change rate and the torque change rate of the vehicle generator; Based on the speed change rate and the torque change rate, determining whether the engine startup fails.

9. An electronic device, characterized in that, Including a memory and a processor coupled to each other, The memory stores program instructions; The processor is configured to execute the program instructions stored in the memory to implement the method according to any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program instructions that can be run by a processor, and the program instructions can be executed by the processor to implement the method according to any one of claims 1-8.

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