Control method and control system of extended-range vehicle and extended-range vehicle

Abstract

The invention provides a control method and a control system of an extended-range vehicle and the extended-range vehicle. The extended-range vehicle includes a range extender. The control method comprises the steps that if the opening degree change rate of an accelerator pedal of the extended-range vehicle is larger than a first opening degree change rate, the target power generation power of a range extender is determined according to the opening degree change rate of the accelerator pedal; the target generated power of the range extender is in negative correlation with the opening change rate of the accelerator pedal; and controlling the range extender to output the target power generation power within a preset duration. When the vehicle needs to be accelerated urgently, the target power generation power of the range extender is controlled to be in negative correlation with the opening change rate of the accelerator pedal, the situation that the total power generation power of the range extender is too high is avoided, vehicle exhaust emission caused by power generation of the range extender is reduced, and the environmental protection performance of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle emission control technology, and in particular to a control method, control system, and range-extended vehicle. Background Technology

[0002] With social development, the management of vehicle exhaust emissions is becoming increasingly stringent. Currently, most range-extended commercial vehicles use the same engines and after-treatment configurations as passenger cars. Test data shows that when the range extender's power is very high, or when the range extender rapidly switches to a high power point, the large exhaust flow and high catalytic converter temperature lead to worsened exhaust emissions, which do not meet the vehicle's environmental protection requirements. Summary of the Invention

[0003] This application provides a control method, control system, and range-extended vehicle for reducing exhaust emissions.

[0004] This application provides a control method for a range-extended vehicle, the range-extended vehicle including a range extender, the control method comprising: If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than the first rate of change of the accelerator pedal opening, the target power generation of the range extender is determined based on the rate of change of the accelerator pedal opening; the target power generation of the range extender is negatively correlated with the rate of change of the accelerator pedal opening. The range extender is controlled to output the target power generation within a preset time period.

[0005] In some embodiments, if the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than the first rate of change of the accelerator pedal opening, it indicates that the vehicle is in a state of rapid acceleration. When the vehicle needs to accelerate rapidly, the target power generation of the range extender is negatively correlated with the rate of change of the accelerator pedal opening. As the rate of change of the accelerator pedal opening increases, the target power generation of the range extender decreases, which can avoid the total power generation of the range extender being too high, reduce the exhaust emissions of the vehicle caused by the power generation of the range extender, and improve the environmental performance of the vehicle.

[0006] Optionally, determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening includes: The target power output of the range extender is determined based on the rate of change of the accelerator pedal opening and the state of charge of the power battery of the range extender vehicle; the target power output of the range extender is negatively correlated with the state of charge of the power battery.

[0007] In some embodiments, when the vehicle needs to accelerate rapidly, the target power generation of the range extender is negatively correlated with the state of charge of the power battery. The more remaining charge of the power battery, the lower the target power generation of the range extender. When the power battery has more remaining charge, it means that the power battery can provide more power generation to the vehicle. At this time, reducing the target power generation of the range extender can reduce the vehicle's exhaust emissions caused by the range extender's power generation and improve the vehicle's environmental performance.

[0008] Optionally, if the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than a first rate of change, determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening includes: If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than a first rate of change and less than a second rate of change, the target power generation of the range extender is determined based on the rate of change of the accelerator pedal opening; the first rate of change is less than the second rate of change. If the rate of change of the accelerator pedal opening of the range-extended vehicle is not less than the second rate of change of opening, the target power generation of the range extender is determined to be zero.

[0009] In some embodiments, if the rate of change of the accelerator pedal opening of the range-extended vehicle is not less than the second rate of change of the opening, it indicates that the rate of change of the accelerator pedal opening is too large and the required acceleration of the vehicle is too large. Determining that the target power generation of the range extender is zero can limit the exhaust emissions of the vehicle caused by the power generation of the range extender and improve the environmental performance of the vehicle.

[0010] Optionally, while determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening, the control method includes: Determine the required power of the range-extended vehicle; After controlling the range extender to output the target power generation within a preset time period, the control method includes: The power variation step size of the range extender is determined based on the required power and the state of charge of the power battery of the range extender; the power variation step size is negatively correlated with the state of charge of the power battery. The power generation power of the range extender is controlled to increase according to the power change step size.

[0011] In some embodiments, the power variation step size of the range extender is determined based on the required power and the state of charge (SBC) of the power battery of the range-extended vehicle. The power variation step size is negatively correlated with the SBC of the power battery. When the remaining charge of the power battery is relatively large, the power variation step size of the range extender is small, so that the power generation of the range extender increases slowly, preventing the total power of the range extender from being too large and causing the vehicle's exhaust emissions to deteriorate. When the remaining charge of the power battery is relatively small, the power variation step size of the range extender is large, so that the power generation of the range extender increases quickly, replenishing the power battery and ensuring the vehicle's power supply.

[0012] Optionally, the power change step size is related to the difference between the required power and the current power.

[0013] In some embodiments, the power change step size can be determined more accurately based on the difference between the required power and the current power, so as to adapt it to the actual operating conditions of the drive motor.

[0014] Optionally, if the state of charge of the power battery is within the normal charge range, while controlling the power generation of the range extender to increase according to the power change step size, the control method includes: The output power of the power battery of the range-extended vehicle is controlled to be the difference between the required power and the power generated by the range extender.

[0015] In some embodiments, while controlling the power generation of the range extender to increase according to the power change step size, the output power of the power battery of the range-extended vehicle is controlled to be the difference between the required power and the power generation of the range extender. This allows the power battery and the range extender to jointly provide the required power for the vehicle, avoiding excessive total power generation of the range extender, reducing vehicle exhaust emissions caused by the power generation of the range extender, and improving the vehicle's environmental performance.

[0016] Optionally, while determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening, the control method includes: Determine the required power of the range-extended vehicle; After controlling the range extender to output the target power generation within a preset time period, the control method includes: If the state of charge of the power battery of the range-extended vehicle is less than the minimum value of the normal charge range but greater than the minimum allowable charge, and the required power is greater than the preset power, the required power is updated to the preset power. The power variation step size of the range extender is determined based on the preset power and the state of charge of the power battery of the range extender vehicle; the power variation step size is negatively correlated with the state of charge of the power battery. The power generation power of the range extender is controlled to increase according to the power change step size.

[0017] In some embodiments, if the state of charge of the power battery is less than the minimum value of the normal charge range but greater than the minimum allowable charge, it indicates that the remaining charge of the power battery is at a low level. If the required power is greater than the preset power, it indicates that the required power is too high. The required power is updated to a preset power that is less than the required power. Based on the preset power and the state of charge of the power battery, the power change step size of the range extender is determined. This can prevent the range extender from having too much power due to excessive demand, which in turn leads to excessive vehicle exhaust emissions.

[0018] Optionally, if the state of charge of the power battery is less than the minimum value of the normal charge range but greater than the minimum allowable charge, and the required power is greater than the preset power, the required power is updated to the preset power, including: If the battery state of charge shows an upward trend, the required power will be updated to the first preset power. If the battery state of charge shows a decreasing trend, the required power is updated to a second preset power; the first preset power is greater than the second preset power.

[0019] In some embodiments, a preset power is determined based on the changing trend of the battery state of charge. If the battery state of charge is increasing, the preset power is a first preset power; if the battery state of charge is decreasing, the preset power is a second preset power that is less than the first preset power. When the battery state of charge decreases, the preset power of the drive motor is even smaller, thereby limiting the required power when the required power is smaller, which can prevent the battery state of charge from decreasing too quickly and ensure the power supply of the vehicle.

[0020] This application provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the control method for a range-extended vehicle as described in any of the preceding claims.

[0021] This application provides a control system for a range-extended vehicle, including one or more processors for implementing the control method for the range-extended vehicle described in any of the above claims.

[0022] This application provides a range-extended vehicle, including: Range extender; and The control system described above is communicatively connected to the range extender.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 The diagram shown is a flowchart of one embodiment of the control method for range-extended vehicles according to this application.

[0026] Figure 2 The diagram shown is a flowchart of another embodiment of the control method of this application.

[0027] Figure 3 As shown Figure 2 The flowchart shown is an embodiment of the step "determining the power variation step size of the range extender based on the power demand of the drive motor and the state of charge of the power battery of the range extender vehicle".

[0028] Figure 4 The diagram shown is a structural block diagram of one embodiment of the control system for the range-extended vehicle of this application. Detailed Implementation

[0029] This application provides a control method, a control system, and a range-extended vehicle. The control method, control system, and range-extended vehicle of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments and implementations can be combined with each other.

[0030] This application provides a range-extended vehicle, including a range extender and a control system provided in this application. The range-extended vehicle also includes a drive motor and a power battery. The range extender can power the power battery or directly power the drive motor. The control system is communicatively connected to the range extender and is used to control the operation of the range extender. The control system is used to control the power generation of the range extender.

[0031] Figure 1 The diagram shown is a flowchart of one embodiment of the control method 10 for range-extended vehicles of this application.

[0032] The control system provided in this application is used to execute the control method 10 for range-extended vehicles.

[0033] like Figure 1 As shown, the control method 10 for range-extended vehicles includes steps 11 to 14.

[0034] Step 11: Obtain the rate of change of the accelerator pedal opening of the range-extended vehicle.

[0035] The rate of change of accelerator pedal opening is used to characterize whether the vehicle requires rapid acceleration. The accelerator pedal is equipped with a position sensor. The rate of change of accelerator pedal opening is obtained from the electrical signal of the position sensor.

[0036] Step 12: Determine whether the rate of change of opening degree is greater than the first rate of change of opening degree.

[0037] The first opening change rate is a threshold used to determine whether a vehicle has entered a rapid acceleration state. The first opening change rate can be calibrated according to vehicle type, road conditions, driving conditions, etc.

[0038] Step 13: If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than the first rate of change, determine the target power generation of the range extender based on the rate of change of the accelerator pedal opening. The target power generation of the range extender is negatively correlated with the rate of change of the accelerator pedal opening.

[0039] If the rate of change of the accelerator pedal opening in a range-extended vehicle is greater than the first rate of change, it indicates that the vehicle is in a state of rapid acceleration. When the vehicle needs rapid acceleration, the target power generation of the range extender is negatively correlated with the rate of change of the accelerator pedal opening. As the rate of change of the accelerator pedal opening increases, the target power generation of the range extender decreases. In this way, the total power generation of the range extender can be prevented from being too high.

[0040] If the rate of change of the accelerator pedal opening of the range-extended vehicle is not greater than the first rate of change of opening, return to step 11.

[0041] If the rate of change of the accelerator pedal opening of the range-extended vehicle is not greater than the first rate of change of opening, it indicates that the vehicle is not in a state of rapid acceleration, and the rate of change of the accelerator pedal opening continues to be obtained.

[0042] Step 14: Control the range extender to output the target power generation within a preset time period.

[0043] The preset duration is relatively short. The range extender outputs the target power generation within the preset duration, enabling the range extender to respond quickly within the preset duration, allowing the vehicle to accelerate rapidly and meet the user's rapid acceleration needs.

[0044] In some embodiments, the preset duration is less than or equal to 2 seconds.

[0045] In some embodiments, if the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than the first rate of change of the accelerator pedal opening, it indicates that the vehicle is in a state of rapid acceleration. When the vehicle needs to accelerate rapidly, the target power generation of the range extender is negatively correlated with the rate of change of the accelerator pedal opening. As the rate of change of the accelerator pedal opening increases, the target power generation of the range extender decreases, which can avoid the total power generation of the range extender being too high, reduce the exhaust emissions of the vehicle caused by the power generation of the range extender, and improve the environmental performance of the vehicle.

[0046] Table 1 shows an example of the vehicle exhaust emission levels corresponding to the power generation capacity of the range extender.

[0047] Table 1 As shown in Table 1, when the range extender's power output reaches 65kW, the exhaust emission level becomes high. To improve the vehicle's environmental performance, the range extender's power output needs to be controlled to not exceed 65kW.

[0048] In some embodiments, step 13 includes: determining the target power output of the range extender based on the rate of change of the accelerator pedal opening and the state of charge of the power battery of the range extender vehicle; the target power output of the range extender is negatively correlated with the state of charge of the power battery.

[0049] When a vehicle needs to accelerate rapidly, the vehicle's power battery and range extender can work together to provide power to the vehicle's drive motor. Based on the rate of change of the accelerator pedal opening and the state of charge (SBC) of the power battery in the range-extended vehicle, the target power output of the range extender is determined. The target power output of the range extender is negatively correlated with the SBC of the power battery. The more remaining charge in the power battery, the lower the target power output of the range extender. When the power battery has more remaining charge, it means that the power battery can provide more power to the vehicle. At this time, reducing the target power output of the range extender can reduce the vehicle's exhaust emissions from the range extender's power generation and improve the vehicle's environmental performance.

[0050] In some embodiments, step 13 includes: If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than the first rate of change and less than the second rate of change, the target power generation of the range extender is determined based on the rate of change of the accelerator pedal opening; the first rate of change is less than the second rate of change. If the rate of change of the accelerator pedal opening of the range-extended vehicle is not less than the second rate of change of the accelerator pedal opening, the target power generation of the range extender is determined to be zero.

[0051] If the rate of change of the accelerator pedal opening of a range-extended vehicle is greater than the first rate of change but less than the second rate of change, it indicates that the vehicle's rapid acceleration demand is within a reasonable range. The target power generation of the range extender can be determined based on the rate of change of the accelerator pedal opening, or the target power generation of the range extender can be determined based on the rate of change of the accelerator pedal opening and the state of charge of the power battery.

[0052] If the rate of change of the accelerator pedal opening of a range-extended vehicle is not less than the second rate of change of the accelerator pedal opening, it indicates that the rate of change of the accelerator pedal opening is too large, and the required acceleration of the vehicle is too large. Determining that the target power generation of the range extender is zero can limit the vehicle's exhaust emissions caused by the power generation of the range extender and improve the vehicle's environmental performance.

[0053] Table 2 shows an example of the target power generation of the range extender, the corresponding opening rate of change, and the battery state of charge.

[0054] Table 2 Table 2 shows that the first opening change rate is 50%, and the second opening change rate is 90%. When the accelerator pedal opening change rate is less than 50%, the target power output of the range extender is 0. When the accelerator pedal opening change rate reaches 50% but does not exceed 90%, under the same battery state of charge, the target power output decreases as the opening change rate increases. Specifically, the target power output can change disproportionately to the opening change rate; the higher the opening change rate, the slower the target power output decreases. When the target power output decreases to 2kW, it stops decreasing. When the battery state of charge reaches 42%, the target power output remains the same at 2kW. When the accelerator pedal opening change rate exceeds 90%, the target power output drops to zero. For the same opening change rate, the target power output decreases as the battery state of charge increases; when the target power output decreases to 2kW, it stops decreasing.

[0055] Figure 2 The following is a flowchart of another embodiment of the control method 10 of this application.

[0056] In some embodiments, concurrently with step 13, the control method 10 includes determining the required power of the range-extended vehicle. After step 14, the control method 10 includes: step 15, determining the power variation step size of the range extender based on the required power and the state of charge of the power battery of the range-extended vehicle; the power variation step size is negatively correlated with the state of charge of the power battery; step 16, controlling the power generation of the range extender to increase according to the power variation step size.

[0057] When a vehicle accelerates rapidly, the required power equals the required power of the drive motor plus the required power of the vehicle's accessories.

[0058] Through step 14, the vehicle can obtain the target power output of the range extender within a preset time period. After the preset time period, the power change step size of the range extender is determined based on the required power and the state of charge of the power battery of the range extender vehicle. According to the power change step size, the power output of the range extender is controlled to increase. In this way, the power output of the range extender is gradually increased according to the power change step size, which can prevent the power output of the range extender from increasing rapidly, resulting in a rapid increase in exhaust emissions.

[0059] The power variation step size of the range extender is determined based on the required power and the state of charge (SBC) of the power battery in the range-extended vehicle. The power variation step size is negatively correlated with the SBC of the power battery. When the remaining charge of the power battery is relatively large, the power variation step size of the range extender is small, so that the power generation of the range extender increases slowly, preventing the total power of the range extender from being too large and causing the vehicle's exhaust emissions to deteriorate. When the remaining charge of the power battery is relatively small, the power variation step size of the range extender is large, so that the power generation of the range extender increases rapidly, replenishing the power battery and ensuring the vehicle's power supply.

[0060] In some embodiments, the power change step size is related to the difference between the required power and the current power.

[0061] By using the difference between the required power and the current power, the power change step size can be determined more accurately, making it adaptable to the actual operating conditions of the drive motor.

[0062] Figure 3 As shown Figure 2 A flowchart of one embodiment of step 15 is shown.

[0063] Step 15 includes: determining the state of charge (SOC) of the power battery; if the SOC is less than the minimum allowable charge, determining the power change step size of the range extender according to the supplementary power generation priority strategy; if the SOC is within the normal charge range, determining the power change step size of the range extender according to the emission priority power generation strategy; if the SOC is greater than the maximum value of the normal charge range, determining the power change step size of the range extender to be zero; for the same difference between the demand power and the current power, the power change step size corresponding to the supplementary power generation priority strategy is greater than the power change step size corresponding to the emission priority power generation strategy.

[0064] Table 3 shows an example of the power change step size corresponding to the emission priority power generation strategy.

[0065] Table 4 shows an example of the power change step size corresponding to the power supplementation priority generation strategy.

[0066] Table 3 Table 4 If the battery's state of charge is less than the minimum allowable charge, the power change step size of the range extender is determined according to the priority power generation strategy shown in Table 4. A larger power change step size results in a faster increase in the power generation of the range extender, thereby replenishing the power battery and preventing the power battery from becoming too low.

[0067] If the battery's state of charge is within the normal charge range, the power change step size of the range extender is determined according to the emission priority power generation strategy shown in Table 3. A smaller power change step size results in a slower increase in the range extender's power generation, which can prevent the total power generation of the range extender from being too large and reduce the vehicle's exhaust emission level.

[0068] In some embodiments, if the state of charge of the power battery is within the normal charge range, in step 16, the control method 10 includes controlling the output power of the power battery of the range-extended vehicle to be the difference between the required power and the power generated by the range extender.

[0069] By controlling the increase of the range extender's power generation according to the power change step size, the output power of the range extender's power battery is controlled to be the difference between the required power and the range extender's power generation. This allows the power battery and the range extender to jointly provide the required power for the vehicle, avoiding excessive total power generation from the range extender, reducing vehicle exhaust emissions from the range extender's power generation, and improving the vehicle's environmental performance.

[0070] refer to Figure 3 After step 14, step 15 further includes: if the state of charge of the power battery is less than the minimum value of the normal charge range but greater than the minimum allowable charge, determine whether the required power is greater than the preset power; if the required power is greater than the preset power, update the required power to the preset power; determine the power change step size of the range extender based on the preset power and the state of charge of the power battery of the range extender; the power change step size is negatively correlated with the state of charge of the power battery.

[0071] The preset power is used to characterize the required power to determine whether the vehicle's exhaust emissions exceed the standard. The preset power can be calibrated according to vehicle model, road conditions, driving conditions, etc. If the state of charge of the power battery is less than the minimum value of the normal charge range but greater than the minimum allowable charge, it indicates that the remaining charge of the power battery is at a low level. If the required power is greater than the preset power, it indicates that the required power is too high. The required power is then updated to the preset power, which is lower than the required power. Based on the preset power and the state of charge of the power battery, the power change step size of the range extender is determined. This can prevent excessive power demand from causing the range extender to have excessive power, which in turn leads to excessive vehicle exhaust emissions.

[0072] In some embodiments, updating the required power to a preset power includes: If the battery state of charge shows an upward trend, update the required power to the first preset power. If the battery state of charge shows a downward trend, the required power will be updated to the second preset power; the first preset power is greater than the second preset power.

[0073] Based on the changing trend of the battery state of charge, a preset power is determined. If the battery state of charge is increasing, the preset power is the first preset power; if the battery state of charge is decreasing, the preset power is the second preset power, which is less than the first preset power. When the battery state of charge decreases, the preset power of the drive motor is even smaller, thus limiting the required power when the required power is smaller. This can prevent the battery state of charge from decreasing too quickly and ensure the power supply of the vehicle.

[0074] In some embodiments, updating the required power to a preset power includes: determining the preset power based on the changing trend of the battery state of charge and the vehicle model.

[0075] Table 5 shows an example of the first preset power and the second preset power.

[0076] Table 5 For the same vehicle model, the first preset power corresponding to an increasing battery state of charge (SOC) trend is greater than the second preset power corresponding to a decreasing SOC trend. When the SOC trend is both increasing and decreasing, the preset power for a vehicle with a larger battery capacity is less than that for a vehicle with a smaller battery capacity. For vehicles with a larger battery capacity, when the preset power is lower, the power demand is limited to equal the preset power. Based on the preset power, the range extender's power output is controlled to prevent excessive power demand and excessive range extender power output, thus reducing emissions from vehicles with larger battery capacity while ensuring their electricity needs are met.

[0077] Figure 4 The diagram shown is a structural block diagram of one embodiment of the control system for the range-extended vehicle of this application.

[0078] like Figure 4 As shown, the control system of the range-extended vehicle includes one or more processors 21 for implementing the control method 10 of the range-extended vehicle as described above.

[0079] In some embodiments, the control system of a range-extended vehicle may include a computer-readable storage medium 22, which may store a program that can be invoked by a processor 21, and may include a non-volatile storage medium. In some embodiments, the control system of a range-extended vehicle may include memory 23 and an interface 24. In some embodiments, the control system of a range-extended vehicle may also include other hardware depending on the specific application.

[0080] The computer-readable storage medium 22 of this application embodiment stores a program that, when executed by the processor 21, is used to implement the range-extended vehicle control method 10 described above.

[0081] This application may take the form of a computer program product implemented on one or more computer-readable storage media 22 (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing program code. The computer-readable storage media 22 includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented using any method or technology. The information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media 22 include, but are not limited to: phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

Claims

1. A control method for a range-extended vehicle, the range-extended vehicle comprising a range extender, characterized in that, The control method includes: If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than the first rate of change of the accelerator pedal opening, the target power generation of the range extender is determined based on the rate of change of the accelerator pedal opening; the target power generation of the range extender is negatively correlated with the rate of change of the accelerator pedal opening. The range extender is controlled to output the target power generation within a preset time period.

2. The control method for a range-extended vehicle according to claim 1, characterized in that, Determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening includes: The target power output of the range extender is determined based on the rate of change of the accelerator pedal opening and the state of charge of the power battery of the range extender vehicle; the target power output of the range extender is negatively correlated with the state of charge of the power battery.

3. The control method for a range-extended vehicle according to claim 1, characterized in that, If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than a first rate of change, the target power generation of the range extender is determined based on the rate of change of the accelerator pedal opening, including: If the rate of change of the accelerator pedal opening of the range-extended vehicle is greater than a first rate of change and less than a second rate of change, the target power generation of the range extender is determined based on the rate of change of the accelerator pedal opening; the first rate of change is less than the second rate of change. If the rate of change of the accelerator pedal opening of the range-extended vehicle is not less than the second rate of change of opening, the target power generation of the range extender is determined to be zero.

4. The control method for a range-extended vehicle according to claim 1, characterized in that, While determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening, the control method includes: Determine the required power of the range-extended vehicle; After controlling the range extender to output the target power generation within a preset time period, the control method includes: The power variation step size of the range extender is determined based on the required power and the state of charge of the power battery of the range extender; the power variation step size is negatively correlated with the state of charge of the power battery. The power generation power of the range extender is controlled to increase according to the power change step size.

5. The control method for a range-extended vehicle according to claim 4, characterized in that, The power change step size is related to the difference between the required power and the current power.

6. The control method for a range-extended vehicle according to claim 4, characterized in that, If the state of charge of the power battery is within the normal charge range, while controlling the power generation of the range extender to increase according to the power change step size, the control method includes: The output power of the power battery of the range-extended vehicle is controlled to be the difference between the required power and the power generated by the range extender.

7. The control method for a range-extended vehicle according to claim 1, characterized in that, While determining the target power generation of the range extender based on the rate of change of the accelerator pedal opening, the control method includes: Determine the required power of the range-extended vehicle; After controlling the range extender to output the target power generation within a preset time period, the control method includes: If the state of charge of the power battery of the range-extended vehicle is less than the minimum value of the normal charge range but greater than the minimum allowable charge, and the required power is greater than the preset power, the required power is updated to the preset power. The power variation step size of the range extender is determined based on the preset power and the state of charge of the power battery of the range extender vehicle; the power variation step size is negatively correlated with the state of charge of the power battery. The power generation power of the range extender is controlled to increase according to the power change step size.

8. The control method for a range-extended vehicle according to claim 7, characterized in that, If the state of charge of the power battery is less than the minimum value of the normal charge range but greater than the minimum allowable charge, and the required power is greater than the preset power, the required power is updated to the preset power, including: If the battery state of charge shows an upward trend, the required power will be updated to the first preset power. If the battery state of charge shows a decreasing trend, the required power is updated to a second preset power; the first preset power is greater than the second preset power.

9. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the control method for a range-extended vehicle as described in any one of claims 1 to 8.

10. A control system for a range-extended vehicle, characterized in that, It includes one or more processors for implementing the control method for a range-extended vehicle as described in any one of claims 1 to 8.

11. A range-extended vehicle, characterized in that, include: Range extender; and The control system as described in claim 10 is communicatively connected to the range extender.

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