Control method for energy reduction, oil consumption reduction and NVH (Noise Vibration and Harshness) of extended-range hybrid electric vehicle

Abstract

The invention belongs to the technical field of extended-range hybrid power vehicle control, particularly relates to an extended-range hybrid power vehicle energy-reducing oil consumption and NVH (Noise Vibration and Harshness) control method, and provides the following scheme aiming at the problem that the existing control logic of an extended-range hybrid power vehicle cannot well reduce oil consumption and control NVH (Noise Vibration and Harshness). The range-extended hybrid electric vehicle comprises a driving motor, a range extender assembly and a high-voltage battery, and further comprises a vehicle control unit (VCU), a range extender assembly controller (RCU) and a motor controller (GCU). According to the energy-reducing oil consumption and NVH control method for the extended-range hybrid electric vehicle, oil consumption is remarkably reduced, through multiple designs such as fixed-point power generation priority, efficient interval adaptation and energy conversion loss optimization, the oil consumption and oil saving rate of the extended-range hybrid electric vehicle reaches 25% compared with a traditional fuel oil cold chain distribution vehicle, the operation cost of a user is greatly reduced, and the service life of the extended-range hybrid electric vehicle is prolonged. And the vehicle economy is improved.

Description

Technical Field

[0001] This invention relates to the field of range-extended hybrid vehicle control technology, and in particular to a control method for reducing fuel consumption and NVH in range-extended hybrid vehicles. Background Technology

[0002] Range-extended hybrid vehicles are finding increasing applications in the market. In urban cold chain delivery scenarios, where warehouses are typically located in suburban or industrial areas, and sales outlets in city centers are often far away, range-extended hybrid vehicles are well-suited for cold chain delivery. They can meet the range requirements and are more economical than traditional gasoline vehicles. Since deliveries are mainly made at night and in the early morning, and the stores are located in densely populated residential areas and near schools, the start-stop control method for the range extender generator must both save fuel and reduce noise.

[0003] For example, Chinese patent document CN106828128A discloses a control method and a range-extended electric vehicle, belonging to the vehicle field, aiming to achieve both low fuel consumption and good NVH performance. The method includes: establishing a nonlinear mapping relationship between each of fuel consumption rate, body vibration intensity, and radiated noise sound pressure level and the range extender speed and effective torque; obtaining an objective function for each of the fuel consumption rate, body vibration intensity, and radiated noise sound pressure level based on the nonlinear mapping relationship; and performing multi-objective optimization on the range extender operating point based on the obtained objective functions; wherein the multi-objectives are the reduction of body vibration intensity, radiated noise sound pressure level, and fuel consumption rate. The above-disclosed patent technology has the following problems: Firstly, the power generation mode is singular, using fixed power generation or simply following the vehicle's power demand, without fully considering the high power output of the range extender. The first problem is that the effective operating range is not dynamically adjusted according to the high-voltage battery's state of charge (SOC) and temperature, resulting in poor fuel consumption control and failing to meet the economic requirements of cold chain delivery vehicles. Secondly, there is no specific noise control scheme designed for low-speed, densely populated areas; the range extender may still operate in high-power mode at low speeds, generating significant noise pollution, which does not meet urban environmental protection and public welfare needs. Thirdly, the range extender lacks adaptability to conditions where battery discharge capacity decreases under extreme temperatures, easily leading to delayed power response or abnormally high fuel consumption. Existing technologies are not easily able to solve these problems. Therefore, there is an urgent need for energy-saving, fuel-consumption-reducing, and NVH-controlled methods for range-extended hybrid vehicles to address these issues. Summary of the Invention

[0004] Based on the technical problem that the current control logic of range-extended hybrid vehicles cannot effectively reduce fuel consumption and control NVH, this invention proposes a control method for reducing fuel consumption and NVH in range-extended hybrid vehicles.

[0005] This invention proposes a control method for reducing energy consumption and NVH in a range-extended hybrid vehicle. The range-extended hybrid vehicle includes a drive motor, a range extender assembly, and a high-voltage battery. The range-extended hybrid vehicle also includes a vehicle control unit (VCU), a range extender assembly control unit (RCU), and a motor control unit (GCU). Range extender assembly: consists of an engine and a generator FISG; The control method includes the following steps; Detect the state of charge (SOC) of the high-voltage battery; The average temperature of the high-voltage battery was detected. Test the overall power consumption of the range-extended hybrid vehicle; The control strategy is selected based on the detected high-voltage battery SOC, high-voltage battery average temperature, and the power demand of the range-extended hybrid vehicle.

[0006] Preferably, based on the detected high-voltage battery SOC range, the vehicle controller (VCU) controls the start-up and shutdown of the range extender's generator FISG.

[0007] Preferably, if the SOC of the high-voltage battery is less than or equal to 30%, the vehicle controller (VCU) controls the range extender generator (FISG) to start and generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%, then the VCU controls the range extender generator (FISG) to stop generating electricity and shut down.

[0008] Preferably, when the range extender generator FISG is not started generating electricity, based on the detection that the power demand of the range-extended hybrid vehicle is greater than the maximum allowable discharge power of the high-voltage battery, there are two possible control strategies; If the sum of the power generated by the fixed-point power generation method and the maximum allowable discharge power of the battery exceeds the power required by the range-extended hybrid vehicle, the vehicle controller (VCU) will control the range extender generator (FISG) to start and generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller (VCU) will control the range extender generator (FISG) to stop generating electricity.

[0009] Preferably, if the sum of the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery is less than the power required by the range-extended hybrid vehicle, then the vehicle controller (VCU) controls the range extender generator (FISG) to start and generate electricity at the power calculated by the power follower method; until the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery exceed the power required by the range-extended hybrid vehicle, then the vehicle controller (VCU) controls the range extender generator (FISG) to generate electricity at the power calculated by the fixed-point power generation method; until the actual SOC of the high-voltage battery is greater than or equal to 70%, then the vehicle controller (VCU) controls the range extender generator (FISG) to stop and cease power generation.

[0010] Preferably, when the range extender generator FISG starts generating electricity, if the vehicle's total power demand is detected to be greater than the vehicle's maximum allowable discharge power, the vehicle controller VCU controls the range extender generator FISG to generate electricity using the power following method until the sum of the power calculated using the fixed-point generation method and the maximum allowable discharge power of the high-voltage battery exceeds the vehicle's total power demand, the vehicle controller VCU controls the range extender generator FISG to generate electricity using the power calculated using the fixed-point generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%, then the vehicle controller VCU controls the range extender generator FISG to shut down and stop generating electricity. Among them, the required power generation calculated by the range extender power follower method is equal to the sum of the total required power generation of the range-extended hybrid vehicle after compensation for the power consumption of the accessories and the power replenishment power of the high-voltage battery; the required power generation calculated by the range extender power follower method should be within the range of the range extender's high-efficiency power generation range.

[0011] Preferably, the low-temperature high-voltage battery has poor discharge capability. When the average temperature of the high-voltage battery is below 0°C or above 50°C, and the maximum allowable discharge power of the high-voltage battery is less than 10kW, the vehicle controller VCU controls the range extender generator FISG to start and generates electricity using the power calculated in the power following mode. The average temperature of the high-voltage battery is detected. When the average temperature of the high-voltage battery is greater than 10°C and less than 45°C, and the sum of the power calculated by the fixed-point power generation mode and the maximum allowable discharge power of the high-voltage battery is greater than the power required by the vehicle, the vehicle controller (VCU) controls the range extender generator (FISG) to generate electricity at the power calculated by the fixed-point power generation mode until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller (VCU) controls the range extender generator (FISG) to shut down and stop generating electricity.

[0012] Preferably, when the actual power consumption of the vehicle is within the high-efficiency range of the range extender and the SOC of the high-voltage battery is less than or equal to 50%, the vehicle controller (VCU) controls the range extender generator (FISG) to start, and generates electricity by taking the smaller of the vehicle's required power and the range extender's maximum allowable power generation. When the actual power consumption of the vehicle is not within the high-efficiency range of the range extender, the vehicle controller VCU controls the range extender generator FISG to generate power using the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller VCU controls the range extender generator FISG to stop generating power, effectively reducing fuel consumption. The high-efficiency range of the range extender is 40kW-65kW, depending on the calibration of the matching range extender.

[0013] Preferably, the high-voltage battery SOC of the range-extended hybrid vehicle is above 30%, and the vehicle speed is below 30km / h when it is driven in pure electric mode; the high-voltage battery SOC of the range-extended hybrid vehicle is below 30%, and the range extender generator FISG generates electricity at low power when the vehicle speed is below 30km / h, thereby reducing the NVH of the entire range-extended hybrid vehicle.

[0014] Preferably, the vehicle controller (VCU) communicates with the range extender assembly controller (RCU) and the motor controller (GCU) to collect operating parameters in real time, execute preset control strategies, and dynamically adjust the start-stop of the range extender generator, the power generation mode, and the power distribution of the vehicle. Range extender assembly controller RCU: Used to communicate with the vehicle controller VCU, receive global control commands, and combine the range extender assembly's own operating status parameters to precisely regulate the range extender engine FISG start / stop, speed, power generation, and operating mode, ensuring that the range extender assembly operates in a high-efficiency, low-noise, and stable state. Motor controller GCU: Used to communicate with the vehicle controller VCU, and work together with the vehicle controller VCU and the range extender assembly controller RCU to achieve: power generation - power supply - drive.

[0015] The beneficial effects of this invention are as follows: 1. The method for controlling energy consumption, fuel consumption, and NVH in the range-extended hybrid vehicle significantly reduces fuel consumption: Through multiple designs such as prioritizing fixed-point power generation, adapting to high-efficiency ranges, and optimizing energy conversion losses, this invention enables the range-extended hybrid vehicle to achieve a fuel saving rate of 25% compared to traditional fuel-powered cold chain delivery vehicles, greatly reducing users' operating costs and improving vehicle economy. 2. The range-extended hybrid vehicle has excellent NVH control methods for reducing energy consumption and NVH: the pure electric driving and low-power generation modes designed for low-speed and densely populated areas effectively avoid the noise generated by the high-power operation of the range extender, reduce the interference to the environment around residential areas and schools, and meet the requirements of urban environmental protection and people's livelihood. 3. The range-extended hybrid vehicle's energy-saving, fuel-efficient, and NVH control methods ensure sufficient power performance: Through dynamic switching between power-following mode and fixed-point power generation mode, as well as adaptive control under extreme temperatures, the vehicle can obtain sufficient power under various operating conditions, avoiding power response lag that affects delivery efficiency. 4. The energy-saving, fuel-efficient, and NVH control methods of this range-extended hybrid vehicle have high adaptability and reliability: core control parameters, such as SOC range, temperature threshold, and high-efficiency power generation range, all support calibration and adjustment, and can be adapted to different models of range extenders, battery systems, and cold chain delivery vehicle configurations. At the same time, through multi-condition adaptation logic, the vehicle's operational stability in complex environments is improved. 5. The range-extended hybrid vehicle has a good battery protection effect by controlling energy consumption, NVH and other factors: through the design of SOC range control and extreme temperature adaptation, it avoids overcharging, over-discharging and overload operation of the battery under extreme temperature, thus extending the battery life and reducing vehicle maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the control principle of a range-extended hybrid vehicle energy-saving, fuel-consumption-reducing, and NVH-controlled method proposed in this invention. Detailed Implementation

[0017] Example 1: Conventional power supply control strategy, refer to Figure 1 A method for controlling energy consumption and NVH in a range-extended hybrid vehicle. The range-extended hybrid vehicle includes a drive motor, a range extender assembly and a high-voltage battery. The range-extended hybrid vehicle also includes a vehicle controller (VCU), a range extender assembly controller (RCU) and a motor controller (GCU). Range extender assembly: consists of an engine and a generator FISG; The control method includes the following steps; Detect the state of charge (SOC) of the high-voltage battery; The average temperature of the high-voltage battery was detected. Test the overall power consumption of the range-extended hybrid vehicle.

[0018] The vehicle controller (VCU) communicates with the range extender assembly controller (RCU) and the motor controller (GCU) to collect operating parameters in real time, execute preset control strategies, and dynamically adjust the start-stop of the range extender generator, the power generation mode, and the power distribution of the vehicle. Range extender assembly controller RCU: Used to communicate with the vehicle controller VCU, receive global control commands, and combine the range extender assembly's own operating status parameters to precisely regulate the range extender engine FISG start / stop, speed, power generation, and operating mode, ensuring that the range extender assembly operates in a high-efficiency, low-noise, and stable state. Motor controller GCU: Used to communicate with the vehicle controller VCU, and work together with the vehicle controller VCU and the range extender assembly controller RCU to achieve: power generation - power supply - drive.

[0019] When in use: The specific control strategy is to detect the SOC of the high-voltage battery and control it between 30% and 70%. The SOC control range of the high-voltage battery can be calibrated, which can effectively reduce fuel consumption. If the actual SOC of the high-voltage battery is less than or equal to 30%, the vehicle control unit (VCU) controls the range extender generator (FISG) to start. At this time, it generates electricity using the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the VCU controls the range extender to stop generating electricity and shut down.

[0020] Example 2: With the range extender not activated, the power control strategy is maintained, referring to... Figure 1 When in use, if the power demand of the range-extended hybrid vehicle exceeds the maximum allowable discharge power of the high-voltage battery, where the power demand is the sum of the drive power and the accessory power, there are two control strategies: Scenario 1: If the sum of the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery is greater than the total power required by the range-extended hybrid vehicle, then the vehicle controller (VCU) should control the range extender generator (FISG) to start and generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller (VCU) should control the range extender generator (FISG) to stop and stop generating electricity.

[0021] Scenario 2: If the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery are less than the vehicle's required power for the range-extended hybrid vehicle, then the vehicle controller (VCU) should control the range extender generator (FISG) to start and generate electricity at the power calculated by the power follower method. This continues until the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery exceed the vehicle's required power for the range-extended hybrid vehicle. In this case, the vehicle controller (VCU) should control the range extender generator (FISG) to generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller (VCU) should control the range extender generator (FISG) to shut down and stop generating electricity.

[0022] Example 3: The range extender is in the activated state, maintaining the power control strategy, as referred to... Figure 1 When in use, if the total power demand of the range-extended hybrid vehicle exceeds the maximum allowable discharge power of the vehicle, where the maximum allowable discharge power is the sum of the power generated by the high-voltage battery and the range extender generator FISG, then the vehicle controller VCU controls the range extender generator FISG to generate power using the power following mode. This continues until the power calculated by the fixed-point power generation mode and the maximum allowable discharge power of the high-voltage battery exceed the total power demand of the range-extended hybrid vehicle. Then, the vehicle controller VCU controls the range extender generator FISG to generate power using the power calculated by the fixed-point power generation mode until the actual SOC of the high-voltage battery is greater than or equal to 70%. At this point, the vehicle controller VCU controls the range extender generator FISG to shut down and stop generating power. Because high-voltage batteries have poor discharge capacity at low temperatures, in order to maintain the discharge temperature environment of the high-voltage battery, if the average temperature of the high-voltage battery is below 0°C or above 50°C, and the maximum allowable discharge power of the high-voltage battery is less than 10kW (this 10kW value can be freely calibrated), then the vehicle controller (VCU) should control the range extender generator (FISG) to start and generate electricity using the power calculated in power-following mode. This continues until the average temperature of the high-voltage battery is greater than 10°C and less than 45°C, and the power calculated in the fixed-point generation mode and the maximum allowable discharge power of the high-voltage battery are greater than the vehicle's required power. Then, the vehicle controller (VCU) should control the range extender generator (FISG) to generate electricity using the power calculated in the fixed-point generation mode until the actual SOC of the high-voltage battery is greater than or equal to 70%. Finally, the vehicle controller (VCU) should control the range extender generator (FISG) to stop generating electricity.

[0023] Example 4: Control strategy to reduce energy transfer, refer to Figure 1 When in use, if the actual power consumption of the range-extended hybrid vehicle is within the high-efficiency range of the range extender (the high-efficiency range of the range extender is set to 40kW-65kW, which is calibrated according to the matching range extender), and the SOC of the high-voltage battery is less than or equal to 50%, then the vehicle controller (VCU) should control the range extender generator (FISG) to start and generate electricity using the smaller of the vehicle's required power and the range extender's maximum allowable power output. This continues until the actual power consumption of the vehicle is no longer within the high-efficiency range of 40kW-65kW. Then, the vehicle controller (VCU) should control the range extender generator (FISG) to generate electricity using the power calculated by the fixed-point generation method. Finally, until the actual SOC of the high-voltage battery is greater than or equal to 70%, the vehicle controller (VCU) should control the range extender generator (FISG) to stop generating electricity, which can effectively reduce fuel consumption.

[0024] Example 5: Control strategy for reducing vehicle NVH (Noise, Vibration, and Harshness), refer to... Figure 1 When in use, the range-extended hybrid vehicle operates on pure electric power when the vehicle's high-voltage battery SOC is above 30% and the vehicle speed is below 30km / h; if the vehicle's high-voltage battery SOC is below 30% and the vehicle speed is below 30km / h, the range extender generator FISG generates electricity in a low-power state, which can effectively avoid noise caused by high-power generation of the range extender in residential areas or near schools.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for controlling energy consumption and NVH (noise, vibration, and harshness) in a range-extended hybrid vehicle, characterized in that, Range-extended hybrid vehicles include a drive motor, a range extender assembly, and a high-voltage battery. Range-extended hybrid vehicles also include a vehicle control unit (VCU), a range extender assembly control unit (RCU), and a motor control unit (GCU). Range extender assembly: consists of an engine and a generator FISG; The control method includes the following steps; Detect the state of charge (SOC) of the high-voltage battery; The average temperature of the high-voltage battery was detected. Test the overall power consumption of the range-extended hybrid vehicle; The control strategy is selected based on the detected high-voltage battery SOC, high-voltage battery average temperature, and the power demand of the range-extended hybrid vehicle.

2. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 1, characterized in that, Based on the detected SOC range of the high-voltage battery, the vehicle control unit (VCU) controls the start-up and shutdown of the range extender's generator FISG.

3. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 2, characterized in that, If the SOC of the high-voltage battery is less than or equal to 30%, the vehicle controller (VCU) will control the range extender generator (FISG) to start and generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the VCU will control the range extender generator (FISG) to stop generating electricity and shut down.

4. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 1, characterized in that, When the range extender generator FISG is not started generating electricity, according to the detection that the power demand of the range-extended hybrid vehicle is greater than the maximum allowable discharge power of the high-voltage battery, there are two control strategies; If the sum of the power generated by the fixed-point power generation method and the maximum allowable discharge power of the battery exceeds the power required by the range-extended hybrid vehicle, the vehicle controller (VCU) will control the range extender generator (FISG) to start and generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller (VCU) will control the range extender generator (FISG) to stop generating electricity.

5. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 4, characterized in that, If the sum of the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery is less than the power required by the range-extended hybrid vehicle, the vehicle controller (VCU) will control the range extender generator (FISG) to start and generate electricity at the power calculated by the power follower method. This continues until the power calculated by the fixed-point power generation method and the maximum allowable discharge power of the high-voltage battery exceed the power required by the range-extended hybrid vehicle. Then, the vehicle controller (VCU) will control the range extender generator (FISG) to generate electricity at the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Finally, the vehicle controller (VCU) will control the range extender generator (FISG) to shut down and stop generating electricity.

6. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 1, characterized in that, When the range extender generator FISG starts generating electricity, if the vehicle's total power demand is detected to be greater than the vehicle's maximum allowable discharge power, the vehicle controller VCU will control the range extender generator FISG to generate electricity using the power following mode until the sum of the power calculated by the fixed-point generation mode and the maximum allowable discharge power of the high-voltage battery exceeds the vehicle's total power demand. Then, the vehicle controller VCU will control the range extender generator FISG to generate electricity using the power calculated by the fixed-point generation mode until the actual SOC of the high-voltage battery is greater than or equal to 70%. Finally, the vehicle controller VCU will control the range extender generator FISG to shut down and stop generating electricity. Among them, the required power generation calculated by the range extender power follower method is equal to the sum of the total required power generation of the range-extended hybrid vehicle after compensation for the power consumption of the accessories and the power replenishment power of the high-voltage battery; the required power generation calculated by the range extender power follower method should be within the range of the range extender's high-efficiency power generation range.

7. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 6, characterized in that, Low-temperature high-voltage batteries have poor discharge capacity. When the average temperature of the high-voltage battery is below 0°C or above 50°C, and the maximum allowable discharge power of the high-voltage battery is less than 10kW, the vehicle controller VCU controls the range extender generator FISG to start and generates electricity using the power calculated in power following mode. The average temperature of the high-voltage battery is detected. When the average temperature of the high-voltage battery is greater than 10°C and less than 45°C, and the sum of the power calculated by the fixed-point power generation mode and the maximum allowable discharge power of the high-voltage battery is greater than the power required by the vehicle, the vehicle controller (VCU) controls the range extender generator (FISG) to generate electricity at the power calculated by the fixed-point power generation mode until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller (VCU) controls the range extender generator (FISG) to shut down and stop generating electricity.

8. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 1, characterized in that, When the actual power consumption of the vehicle is within the high-efficiency range of the range extender and the SOC of the high-voltage battery is less than or equal to 50%, the vehicle controller (VCU) controls the range extender generator (FISG) to start and generates electricity by taking the smaller of the vehicle's required power and the range extender's maximum allowable power generation. When the actual power consumption of the vehicle is not within the high-efficiency range of the range extender, the vehicle controller VCU controls the range extender generator FISG to generate power using the power calculated by the fixed-point power generation method until the actual SOC of the high-voltage battery is greater than or equal to 70%. Then, the vehicle controller VCU controls the range extender generator FISG to stop generating power, effectively reducing fuel consumption. The high-efficiency range of the range extender is 40kW-65kW, depending on the calibration of the matching range extender.

9. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 1, characterized in that, The test shows that the high-voltage battery SOC of the range-extended hybrid vehicle is above 30%, and the vehicle speed is below 30km / h when it is driven in pure electric mode; the high-voltage battery SOC of the range-extended hybrid vehicle is below 30%, and the range extender generator FISG generates power at low power when the vehicle speed is below 30km / h, thereby reducing the NVH of the entire range-extended hybrid vehicle.

10. The method for controlling energy consumption and NVH of a range-extended hybrid vehicle according to claim 1, characterized in that, The vehicle controller (VCU) communicates with the range extender assembly controller (RCU) and the motor controller (GCU) to collect operating parameters in real time, execute preset control strategies, and dynamically adjust the start-stop of the range extender generator, the power generation mode, and the power distribution of the vehicle. Range extender assembly controller RCU: Used to communicate with the vehicle controller VCU, receive global control commands, and combine the range extender assembly's own operating status parameters to precisely regulate the range extender engine FISG start / stop, speed, power generation, and operating mode, ensuring that the range extender assembly operates in a high-efficiency, low-noise, and stable state. Motor controller GCU: Used to communicate with the vehicle controller VCU, and work together with the vehicle controller VCU and the range extender assembly controller RCU to achieve: power generation - power supply - drive.

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