Starting power generation control method and system for range extender in plateau environment

Abstract

The invention discloses a starting power generation control method and system for a range extender in a plateau environment, and the method comprises the steps: collecting the temperature of a coolant of an engine and an altitude value, and setting the starting torque and dragging time of the engine; after the dragging time is over, autonomous idling landing judgment of the engine is carried out; if it is judged that idling succeeds, an engine heat engine mode is started, and otherwise, starting dragging is conducted again; in the heat engine state, an engine coolant temperature sampling value is input, and an engine operation rotating speed value and a generator output power value are output according to a preset temperature-rotating speed-power three-dimensional table; and when a power generation link is entered after the heat engine is finished, power closed-loop output is performed according to a power instruction issued by the whole vehicle, and power generation control is performed. The engine can smoothly run on the plateau and stably run for power generation.

Description

Technical Field

[0002] The present application relates to the technical field of starting and power generation control of a range extender in a plateau environment, and in particular to a method and system for starting and power generation control of a range extender in a plateau environment. Background Art

[0003] With the widespread popularity of new energy vehicles and the extensive application of electric vehicles in special industries, the demand for charging equipment is also increasing. Traditional fixed charging piles have shortcomings such as poor flexibility, requirements for installation locations, and the inability to charge anytime and anywhere, which limits the range of electric vehicles. The extended-range starting and power generation system can make up for the shortcomings of charging piles. It has the advantages of high flexibility, modularity, and no restrictions on time and space, and can keep the engine working at high thermal efficiency. It has begun to be widely used in new energy vehicles, especially special vehicles.

[0004] In order to meet the needs of electric vehicles in plateau environments, existing technologies usually use a variety of measures to ensure the normal start and efficient operation of the engine. For example, the performance of the engine under low temperature and low oxygen conditions is improved by optimizing the fuel supply strategy and improving the accuracy of the electronic control system. In addition, some solutions also use preheating devices and high compression ratio designs to enhance the cold start capability of the engine in extreme environments.

[0005] However, the solutions for engine starting and stable operation in plateau environments in the prior art generally have the following defects: First, in the harsh environment of high cold or low oxygen, especially in the plateau, the range extender is difficult to start the engine autonomously due to the thin oxygen and low temperature during the starting process; second, even after successful starting, the engine takes a long time to reach the optimal working state, which not only prolongs the preheating time but also increases energy consumption; third, when the engine has unstable speed or incomplete fuel combustion, there is a lack of effective auxiliary mechanism to maintain its normal operation. Therefore, how to achieve fast and reliable engine starting and stable power generation in plateau environments has become a key issue that needs to be solved urgently. Summary of the invention

[0006] In order to achieve smooth engine starting and stable power generation in plateaus, the present application provides a method and system for controlling starting and power generation of a range extender in a plateau environment.

[0007] In a first aspect, the present application provides a method for controlling starting power generation of a range extender in a plateau environment, comprising: S1. Collect engine coolant temperature and altitude values, and set the engine starting torque and drag time; S2. After the dragging time is over, the engine autonomous idling start is judged; if the idling is judged to be successful, the engine warm-up mode is entered, otherwise the start dragging is performed again; S3. In the hot engine state, input the engine coolant temperature sampling value, and output the engine running speed value and the generator output power value according to the preset temperature-speed-power three-dimensional table; S4: When entering the power generation phase after the heat engine is finished, power closed-loop output is performed according to the power command issued by the vehicle to control power generation.

[0008] By adopting the above scheme, during the starting stage, the coolant temperature and altitude are comprehensively considered to adaptively adjust the starting torque and dragging time, thereby improving the starting success rate under extreme conditions; after the dragging time is over, the engine speed value is continuously monitored to determine whether the vehicle has started successfully, and timely identification is made to avoid long-term invalid operation; during the warm-up process, the generator output power is adjusted accordingly according to the change in coolant temperature, the engine preheating speed is accelerated, and the time to reach the optimal working state is shortened; after the warm-up is completed, closed-loop control is performed according to the power command issued by the whole vehicle to ensure that the power generation process is stable and efficient; multiple stages of regulation can ensure that the engine starts smoothly under low temperature and low oxygen conditions in the plateau environment, and quickly enters the warm-up state.

[0009] Preferably, the step S1 specifically includes: Read the collected altitude value, and adaptively adjust the engine front injection and rear injection interval and injection amount according to the read altitude value; Establishing a temperature-torque-drag time three-dimensional table based on historical engine operation data; the engine operation data includes: the altitude value, coolant temperature, engine load, and engine starting torque and drag time during each engine start process; According to the currently collected coolant temperature sampling value, the corresponding engine drag torque and drag time are output.

[0010] By adopting the above scheme, the engine's front injection and rear injection intervals and injection amount are automatically adjusted according to the conditions of the plateau environment, thereby optimizing the starting performance; combined with the temperature-torque-drag time three-dimensional table, the appropriate engine drag torque and drag time are accurately output according to the current coolant temperature, thereby improving the starting success rate and reliability.

[0011] Preferably, the step S2 specifically includes: After the dragging time ends, continuously monitoring the engine speed value within a first preset time period; Determine whether the engine speed value is continuously higher than the first preset value within the first preset time period; if it is continuously higher, it is determined that the idling is successful and the vehicle enters the autonomous starting state; otherwise, it is determined that the vehicle fails to start; when it is determined that the idling is successful, the engine enters the engine warm-up mode; When it is determined that the vehicle has failed to start, starting and dragging are performed again according to the restart and dragging strategy; the restart and dragging strategy includes: starting and dragging for a preset number of times, if the autonomous vehicle starting state cannot be entered for the preset number of consecutive times, then starting failure is determined and a prompt message is generated.

[0012] By adopting the above scheme, the engine speed value within the first preset time period is continuously monitored and compared with the dynamic threshold value, so as to promptly detect whether the engine has reached a stable idle state, thereby more accurately ensuring the smooth start of the engine in a high-cold and low-oxygen environment, and setting a preset number of dragging times to avoid invalid repeated starting attempts, save energy and reduce wear.

[0013] Preferably, the method for establishing the preset temperature-speed-power three-dimensional table in step S3 includes: According to the preset engine coolant temperature range, temperature sub-intervals are established with each preset sub-temperature range as the interval. In each sub-interval, the required engine operating speed value and power generation power value are set to meet the requirement that as the set engine coolant temperature rises, the set power gradually increases, thereby obtaining a preset temperature-speed-power three-dimensional table.

[0014] By adopting the above scheme, in each sub-interval, a power generation value is set that gradually increases with the increase in coolant temperature, so that the engine can reach the ideal working state more quickly during the warm-up process, reducing unnecessary preheating time and effectively shortening the engine warm-up time in a plateau environment.

[0015] Preferably, the closed-loop power output according to the power command issued by the vehicle in step S4 includes: A two-dimensional power constraint matrix of battery SOC value and temperature value is established, and the power generation command requested by the vehicle is responded to under the constraint matrix; according to the power generation command requested by the vehicle and the current feedback power, a power feedforward closed loop is performed, and the calculation equation is: Where P out is the current calculated output power, P ref Request power command for the vehicle, P fdb is the current feedback power, k p is the proportional gain, k i is the integral gain, k f is the feed-forward gain.

[0016] By adopting the above scheme, a constraint matrix is ​​constructed and power control is performed according to the SOC value and temperature value, and then power feedforward closed-loop control is performed on the power command issued by the whole vehicle, which can effectively reduce the fluctuation of power generation and improve the stability and reliability of the system.

[0017] Preferably, step S4 further includes: The power closed-loop output is performed according to the power command issued by the whole vehicle. During the power generation control process, the engine speed is monitored to determine whether the speed drops. If so, the generator is immediately switched to electric mode to provide auxiliary torque to the engine and maintain the current power generation speed until the engine can run autonomously again.

[0018] By adopting the above solution, during the power generation control process, the engine speed changes are monitored in real time. When the engine speed drops, the generator quickly switches to electric mode to provide the engine with necessary auxiliary torque to maintain the current power generation speed, thereby preventing abnormal power generation or engine shutdown due to unstable engine speed.

[0019] Preferably, step S4 further includes: After receiving the power request command issued by the whole vehicle, the engine controller uses the power request command issued by the whole vehicle to output the generator torque command and the engine speed control command according to the constraint matrix and the power closed loop, and sends the engine speed control command to the engine ECU through the CAN bus, while enabling the generator controller itself to execute the torque output command.

[0020] By adopting the above solution, the range extender control function is integrated, and the engine controller is used to output the generator torque command and engine speed control command according to the constraint matrix and power closed loop of the power request command issued by the whole vehicle, thereby enhancing the reliability and stability of the system and avoiding performance degradation caused by communication delays or failures.

[0021] In a second aspect, the present application provides a control system for starting and generating electricity of a range extender in a plateau environment, comprising: The engine drag module is used to collect the engine coolant temperature and altitude values, and set the engine starting torque and drag time; The engine idle speed judgment module is used to judge the engine's autonomous idle speed after the dragging time ends; if the idle speed judgment is successful, the engine enters the engine warm-up mode, otherwise the start dragging is performed again; The engine heat process module is used to input the engine coolant temperature sampling value in the heat state, and output the engine running speed value and the generator output power value according to the preset temperature-speed-power three-dimensional table; The generator working module is used to perform power closed-loop output and power generation control according to the power command issued by the whole vehicle when entering the power generation stage after the thermal engine ends.

[0022] By adopting the above solution, the engine can be started smoothly and quickly enter the hot engine state under low temperature and low oxygen conditions in a plateau environment.

[0023] In a third aspect, the present application provides a computer-readable storage medium, wherein 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 method as described above.

[0024] In a fourth aspect, the present application provides a computer device, comprising a memory, a processor, and a program stored and executable on the memory, wherein the program implements the steps of the above method when executed by the processor.

[0025] In summary, this application has the following beneficial effects: 1. By collecting the engine coolant temperature and altitude values, the engine front and rear injection intervals and injection amount are adaptively adjusted, and the appropriate starting torque and drag time are output according to the preset temperature-torque-drag time three-dimensional table, so that the engine can start smoothly in harsh environments; by continuously monitoring the engine speed value to determine whether the vehicle is successfully started, timely identify and issue prompt information to avoid long-term invalid operation; in the hot engine state, the power generation power is gradually increased through the temperature-speed-power three-dimensional table. As the engine coolant temperature rises, the set power gradually increases, thereby shortening the preheating time and allowing the engine to quickly enter the efficient power generation state; after the hot engine is completed, closed-loop control is performed according to the power command issued by the vehicle to ensure stable and efficient power generation process; 2. During the entire power generation process, the engine speed is continuously monitored. If the speed drops, the generator will immediately switch to electric mode to provide auxiliary torque to the engine to maintain the current power generation speed until the engine resumes normal operation, effectively avoiding the risk of engine stalling; 3. The engine controller integrates the range extender control function. It is not only responsible for receiving the power request command issued by the whole vehicle, but also can calculate the corresponding generator torque command and engine speed control command according to the constraint matrix and power closed loop, and communicate with the engine ECU through the CAN bus to achieve coordinated control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of the method described in a specific embodiment; Figure 2 is a flow chart of a heat engine process control method in the method described in a specific embodiment; Figure 3 A flowchart of the generator working process under the constraint matrix in the power generation control process of the method described in the specific embodiment; Figure 4 It is a working flow chart of the generator switching from braking to electric state during the power generation control process of the method described in the specific embodiment; Figure 5 It is a schematic diagram of a framework for realizing coordinated control of a generator and an engine by using a generator controller of an integrated generator control unit in the method described in a specific embodiment; Figure 6 It is a schematic diagram of the structure of the system described in the specific embodiment. DETAILED DESCRIPTION

[0027] 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.

[0028] Traditional fixed charging piles have shortcomings such as poor flexibility, requirements for installation locations, and the inability to charge anytime and anywhere, which limits the range of electric vehicles. The extended-range starting and power generation system can make up for the shortcomings of charging piles, but the range extender is in a harsh environment of high cold or low oxygen, especially in the plateau, where both high cold and low oxygen are present. The engine starting and running with load will become very difficult, while the generator is not affected by the high cold and low oxygen environment.

[0029] In order to improve the above situation, it is considered to make full use of the assistance of the generator to ensure that the engine starts smoothly and generates electricity stably on the plateau. Figure 1 As shown, the embodiment of the present application discloses a method for controlling the start-up and power generation of a range extender in a plateau environment, and the specific steps include: S1. Start the engine, collect the engine coolant temperature and altitude values, and set the engine starting torque and drag time.

[0030] Specifically, after the engine is started, the sensor is used to collect the engine coolant temperature and the altitude value of the current environment in real time.

[0031] The collected altitude value is read, and the interval between the front and rear injections of the engine and the injection amount are adaptively adjusted according to the read altitude value; wherein, the adaptive adjustment is completed by using a neural network algorithm, and the interval between the front and rear injections of the engine and the injection amount under the condition that the engine starting performance index at different altitudes is greater than the preset starting performance index are used to train a neural network model, the input of the model is the altitude value, and the output is the interval between the front and rear injections of the engine and the injection amount, and the adaptive adjustment according to the read altitude value is completed. In addition, in order to further optimize the starting performance, the air humidity is collected through a humidity sensor, and the interval between the front and rear injections of the engine and the injection amount are adaptively adjusted according to the altitude, coolant temperature and air humidity value.

[0032] A temperature-torque-drag time three-dimensional table is established based on the historically recorded engine operation data; the engine operation data includes: the altitude value, coolant temperature, engine load, and the engine starting torque and drag time during each engine start; in order to ensure the accuracy of the established temperature-torque-drag time three-dimensional table, the temperature-torque-drag time three-dimensional table can be corrected and improved based on multiple test record data to ensure that the appropriate starting torque and drag time can be accurately output under various circumstances. The data update frequency of the three-dimensional table can be manually set to ensure real-time performance. For example, it can be automatically updated once an hour, or manually updated after each start is completed.

[0033] According to the currently collected coolant temperature sampling value, the corresponding engine drag torque and drag time are outputted, so as to complete the engine starting and dragging according to the output drag torque and drag time.

[0034] S2. After the dragging time is over, determine whether the engine is idling autonomously.

[0035] Specifically, after the dragging time ends, the engine speed value is continuously monitored within a first preset time period; in this embodiment, the first preset time period is set to 5S.

[0036] Determine whether the engine speed value is continuously higher than a first preset value within a first preset time period. If so, it is determined that the idling is successful and the vehicle enters the autonomous starting state; otherwise, it is determined that the starting fails. The first preset value is a dynamic preset value that is dynamically adjusted and set according to the real-time acquired altitude value using a machine learning algorithm. The preset value acquisition model can be trained by using the first preset value corresponding to the engine being in the autonomous idling starting state under historical conditions of different altitude values. The model input is the altitude value, and the output is the first preset value corresponding to the altitude value.

[0037] When the idling is determined to be successful, the engine warm-up mode is entered and the process goes to step S3.

[0038] When the vehicle is determined to have failed to start, the vehicle is started and dragged again according to the restart and dragging strategy, that is, the process goes to S1; the restart and dragging strategy includes: starting and dragging for a preset number of times, and if the vehicle fails to enter the autonomous start state for the preset number of times in a row, the start failure is determined and a prompt message is generated. In this embodiment, the preset number of times is 3 times.

[0039] S3. In the hot engine state, input the engine coolant temperature sampling value, and output the engine running speed value and the generator output power value according to the preset temperature-speed-power three-dimensional table.

[0040] Specifically, Figure 2 As shown, the engine coolant temperature sampling value is input, and the engine operating speed value and the generator output power value are output according to the preset temperature-speed-power three-dimensional table, and then the engine speed and the generator torque can be determined according to the pre-constructed power-speed-torque three-dimensional table.

[0041] The establishment of the preset temperature-speed-power three-dimensional table includes: according to the preset engine coolant temperature range (for example, from -50°C to +70°C), establishing temperature sub-intervals with each preset sub-temperature range (10°C) interval, and setting the required engine running speed value and power generation value in each sub-interval, so as to meet the requirement that the set power gradually increases as the set engine coolant temperature rises; Among them, the required engine operating speed value and power generation power value settings can be further pre-set based on the initial range of operating speed values ​​and power generation power values ​​recorded by the running hot engine under different engine coolant temperature conditions in history, and then as the set engine coolant temperature rises, the corresponding set power gradually increases, so as to finally obtain a preset temperature-speed-power three-dimensional table.

[0042] S4: When entering the power generation phase after the heat engine is finished, power closed-loop output is performed according to the power command issued by the vehicle to control power generation.

[0043] like Figure 3 As shown, a two-dimensional power constraint matrix of battery SOC value and temperature value is established, and the power generation command requested by the whole vehicle is responded to under the constraint matrix.

[0044] Specifically, collect the performance data of the battery at different SOC values ​​and temperatures, including the maximum discharge power, maximum charging power, etc., and establish a two-dimensional matrix with the SOC value and temperature as the coordinate axes; at each (SOC, temperature) point, set the corresponding power constraint value according to the collected data, including the maximum discharge power and the maximum charging power; this matrix will serve as the basis for subsequent responses to vehicle power requests. When receiving a power generation request sent by the vehicle, first parse the power value and target SOC value in the request. According to the current SOC value and temperature value of the battery, find the corresponding power constraint in the two-dimensional power constraint matrix. Determine whether the power requested by the vehicle is within the constraint range. If so, proceed to the next step; if not, adjust the requested power to within the constraint range.

[0045] After responding to the power generation command requested by the vehicle, a power feedforward closed loop is performed according to the power generation command requested by the vehicle and the current feedback power. The calculation equation is: Where P out is the current calculated output power, P ref Request power command for the vehicle, P fdb is the current feedback power, k p is the proportional gain, k i is the integral gain, k f is the feed-forward gain.

[0046] Power generation control is performed based on the closed-loop power feedforward closed-loop output.

[0047] In a specific embodiment, considering that when there is a large step in the power generation load or the engine itself drops in speed due to environmental changes or the engine mechanical torque output is small due to insufficient fuel combustion, resulting in abnormal power output, the generator will stop generating electricity and it is necessary to provide auxiliary torque to the engine so that the engine can run autonomously again, the method step S4 also includes: like Figure 4 As shown, in the process of power generation control, the power closed-loop output is performed according to the power command issued by the whole vehicle. The generator works in a braking state, monitors the engine speed, and determines whether the speed drops. If the speed drops, the generator is immediately switched to electric mode to achieve electric power assistance, provide auxiliary torque to the engine, and periodically drag the engine to maintain the current power generation speed until the engine can run autonomously again.

[0048] In a specific embodiment, in order to further enhance the reliability and stability of the system and avoid performance degradation caused by communication delay or failure, step S4 of the method further includes: like Figure 5As shown, after receiving the power request instruction issued by the whole vehicle, the engine controller is used to output the generator torque instruction and the engine speed control instruction according to the constraint matrix and the power closed loop, and the engine speed control instruction is sent to the engine ECU through the CAN bus, and the generator controller itself executes the torque output instruction.

[0049] like Figure 6 As shown, the embodiment of the present application also discloses a control system for starting and generating electricity of a range extender in a plateau environment, specifically comprising: The engine drag module 101 is used to collect the engine coolant temperature and altitude value, and set the engine starting torque and drag time; The engine idle speed judgment module 102 is used to judge whether the engine is idling autonomously after the dragging time ends; if the idle speed judgment is successful, the engine enters the engine warm-up mode, otherwise the dragging is started again; The engine heat process module 103 is used to input the engine coolant temperature sampling value in the heat state, and output the engine running speed value and the generator output power value according to the preset temperature-speed-power three-dimensional table; The generator working module 104 is used to perform power closed-loop output and power generation control according to the power command issued by the whole vehicle when entering the power generation stage after the heat engine ends.

[0050] The embodiment of the present application also discloses a computer-readable storage medium.

[0051] Specifically, the computer-readable storage medium stores a computer program that can be loaded by a processor and execute the above-mentioned range extender starting and power generation control method in a plateau environment. The computer-readable storage medium includes, for example: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0052] The embodiment of the present application also discloses a computer device.

[0053] Specifically, the computer device includes a memory and a processor, and the memory stores a computer program that can be loaded by the processor and execute the above-mentioned method for controlling the starting and power generation of a range extender in a plateau environment.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for controlling the start-up and power generation of a range extender in a plateau environment, characterized in that: include: S1. Collect engine coolant temperature and altitude values, and set the engine starting torque and drag time; S2. After the dragging time is over, the engine autonomous idling start is judged; if the idling is judged to be successful, the engine warm-up mode is entered, otherwise the start dragging is performed again; S3, in the hot engine state, input the engine coolant temperature sampling value, and output the engine running speed value and the generator output power value according to the preset temperature-speed-power three-dimensional table; S4: When entering the power generation phase after the heat engine is finished, power closed-loop output is performed according to the power command issued by the vehicle to control power generation.

2. The method for controlling starting power generation of a range extender in a plateau environment according to claim 1, characterized in that: The step S1 specifically includes: Read the collected altitude value, and adaptively adjust the engine front injection and rear injection interval and injection amount according to the read altitude value; Establishing a temperature-torque-drag time three-dimensional table based on historical engine operation data; the engine operation data includes: the altitude value, coolant temperature, engine load, and engine starting torque and drag time during each engine start process; According to the currently collected coolant temperature sampling value, the corresponding engine drag torque and drag time are output.

3. The method for controlling starting and generating electricity of a range extender in a plateau environment according to claim 1, characterized in that: The step S2 specifically includes: After the dragging time ends, continuously monitoring the engine speed value within a first preset time period; Determine whether the engine speed value is continuously higher than the first preset value within the first preset time period, if continuously higher, then it is determined that the idling is successful and the vehicle enters the autonomous starting state, otherwise it is determined that the vehicle fails to start; When the idle speed is determined to be successful, the engine enters the warm-up mode; When it is determined that the vehicle has failed to start, starting and dragging are performed again according to the restart and dragging strategy; the restart and dragging strategy includes: starting and dragging for a preset number of times, if the autonomous vehicle starting state cannot be entered for the preset number of consecutive times, then starting failure is determined and a prompt message is generated.

4. The method for controlling starting and generating electricity of a range extender in a plateau environment according to claim 1, characterized in that: The method for establishing the preset temperature-speed-power three-dimensional table in step S3 includes: According to the preset engine coolant temperature range, temperature sub-intervals are established with each preset sub-temperature range as the interval. In each sub-interval, the required engine operating speed value and power generation power value are set to meet the requirement that as the set engine coolant temperature rises, the set power gradually increases, thereby obtaining a preset temperature-speed-power three-dimensional table.

5. The method for controlling starting power generation of a range extender in a plateau environment according to claim 1, characterized in that: The closed-loop power output according to the power command issued by the vehicle in step S4 includes: A two-dimensional power constraint matrix of battery SOC value and temperature value is established, and the power generation command requested by the vehicle is responded to under the constraint matrix; according to the power generation command requested by the vehicle and the current feedback power, a power feedforward closed loop is performed, and the calculation equation is: Where P out is the current calculated output power, P ref Request power command for the vehicle, P fdb is the current feedback power, k p is the proportional gain, k i is the integral gain, k f is the feed-forward gain.

6. The method for controlling starting power generation of a range extender in a plateau environment according to claim 1, characterized in that: Step S4 also includes: The power closed-loop output is performed according to the power command issued by the whole vehicle. During the power generation control process, the engine speed is monitored to determine whether the speed drops. If so, the generator is immediately switched to electric mode to provide auxiliary torque to the engine and maintain the current power generation speed until the engine can run autonomously again.

7. The method for controlling starting power generation of a range extender in a plateau environment according to claim 5, characterized in that: Step S4 also includes: After receiving the power request command issued by the whole vehicle, the engine controller uses the power request command issued by the whole vehicle to output the generator torque command and the engine speed control command according to the constraint matrix and the power closed loop, and sends the engine speed control command to the engine ECU through the CAN bus, while enabling the generator controller itself to execute the torque output command.

8. A control system for starting power generation of a range extender in a plateau environment, characterized in that: include: The engine drag module is used to collect the engine coolant temperature and altitude values, and set the engine starting torque and drag time; The engine idle speed judgment module is used to judge whether the engine will start idling autonomously after the dragging time ends; If the idle speed is judged to be successful, the engine enters the engine warm-up mode, otherwise the start-up drag is performed again; The engine heat process module is used to input the engine coolant temperature sampling value in the heat state, and output the engine running speed value and the generator output power value according to the preset temperature-speed-power three-dimensional table; The generator working module is used to perform power closed-loop output and power generation control according to the power command issued by the whole vehicle when entering the power generation stage after the thermal engine ends.

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 method according to any one of claims 1 to 7.

10. A computer device, characterized in that: The computer device comprises a memory, a processor and a program stored and executable on the memory, and the program implements the steps of the method according to any one of claims 1 to 7 when executed by the processor.

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