CN-122009142-A - Control method for energy-reducing oil consumption and NVH (noise and harshness) of range-extending hybrid electric vehicle

CN122009142ACN 122009142 ACN122009142 ACN 122009142ACN-122009142-A

Abstract

The invention belongs to the technical field of control of a range-extending hybrid power vehicle, in particular to a control method for reducing energy consumption and NVH of a range-extending hybrid power vehicle, which aims at solving the problems that the control logic of the existing range-extending hybrid power vehicle can not well reduce the energy consumption and control the NVH, the scheme is that the range-extending hybrid electric vehicle comprises a driving motor, a range extender assembly, a high-voltage battery, a whole vehicle controller VCU, a Cheng Qizong-formed controller RCU and a motor controller GCU. The method for controlling the energy-reducing oil consumption and the NVH of the range-extending hybrid electric vehicle has the advantages that the oil consumption is obviously reduced, and compared with the traditional fuel oil and cold chain distribution vehicle, the range-extending hybrid electric vehicle has the oil consumption and oil saving rate of 25% through multiple designs of fixed-point power generation priority, efficient interval adaptation, energy conversion loss optimization and the like, so that the operation cost of a user is greatly reduced, and the vehicle economy is improved.

Inventors

XU JIAN
CHEN HUI
LIU CONGRUI
LIU YAN
PENG HAIQING

Assignees

东风华神汽车有限公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The control method for the energy-saving oil consumption and NVH of the range-extending hybrid electric vehicle is characterized in that the range-extending hybrid electric vehicle comprises a driving motor, a range extender assembly and a high-voltage battery, and further comprises a whole vehicle controller VCU, a Cheng Qizong-way controller RCU and a motor controller GCU; the range extender assembly consists of an engine and a generator FISG; The control method includes the following steps; detecting the high-voltage battery SOC; Detecting the average temperature of the high-voltage battery; Detecting the whole vehicle power consumption of the range-extending hybrid electric vehicle; and selecting a control strategy according to the detected SOC of the high-voltage battery, the average temperature of the high-voltage battery and the required power of the range-extending hybrid electric vehicle.
2. The control method for reducing energy consumption and NVH of a range extender hybrid vehicle according to claim 1, wherein the vehicle controller VCU controls the generator FISG of the range extender to start and stop according to the detected high-voltage battery SOC interval.
3. The method for controlling the energy-saving oil consumption and the NVH of the range-extended hybrid vehicle according to claim 2, wherein the high-voltage battery SOC is less than or equal to 30%, the whole vehicle controller VCU controls the range extender generator FISG to start, the power calculated in a fixed-point power generation mode is used for generating power, and the VCU controls the range extender generator FISG to stop generating power and stopping power until the actual SOC of the high-voltage battery is greater than or equal to 70%.
4. The control method for reducing energy consumption and NVH of the range-extending hybrid vehicle according to claim 1, wherein when the range extender generator FISG is not started to generate electricity, two conditions exist in a control strategy according to the detection that the required power of the range-extending hybrid vehicle is greater than the maximum allowable discharge power of the high-voltage battery; The sum of the power of the fixed-point power generation mode and the maximum allowable discharge power of the battery is larger than the required power of the range extender hybrid vehicle, the whole vehicle controller VCU controls the range extender generator FISG to start, and the power calculated in the fixed-point power generation mode is used for generating power until the actual SOC of the high-voltage battery is larger than or equal to 70%, and the whole vehicle controller VCU controls the range extender generator FISG to stop generating power.
5. The method for controlling energy-saving oil consumption and NVH of a range-extending hybrid vehicle according to claim 4, wherein the sum of the power calculated in the fixed-point power generation mode and the maximum allowable discharge power of the high-voltage battery is smaller than the required power of the range-extending hybrid vehicle, the whole vehicle controller VCU controls the range-extending generator FISG to start and generates power in a power following mode, until the power calculated in the fixed-point power generation mode and the maximum allowable discharge power of the high-voltage battery are larger than the required power of the range-extending hybrid vehicle, the whole vehicle controller VCU controls the range-extending generator FISG to generate power in the fixed-point power generation mode, until the actual SOC of the high-voltage battery is larger than or equal to 70%, and the whole vehicle controller VCU controls the range-extending generator FISG to stop generating power, and stops generating power.
6. The control method for reducing energy consumption and NVH of a range extender hybrid vehicle according to claim 1, wherein when a range extender generator FISG is started to generate electricity, detecting that the whole vehicle required power of the range extender hybrid vehicle is larger than the maximum allowable discharge power of the whole vehicle, then the whole vehicle controller VCU controls the range extender generator FISG to generate electricity in a power following mode, until the sum of the power calculated in a fixed-point power generation mode and the maximum allowable discharge power of a high-voltage battery is larger than the whole vehicle required power of the range extender hybrid vehicle, then the whole vehicle controller VCU controls the range extender generator FISG to generate electricity in a fixed-point power generation mode, until the actual SOC of the high-voltage battery is larger than or equal to 70%, then the whole vehicle controller VCU controls the range extender generator FISG to stop generating electricity, and stops generating electricity; the required power generation power calculated in the range extender power following mode is equal to the sum of the whole vehicle required power generation power of the range extender hybrid vehicle after the power consumption of the accessory is compensated and the power compensation power of the high-voltage battery, and the required power generation power calculated in the range extender power following mode is in the range of a power generation interval of Cheng Qigao efficiency.
7. The control method for reducing energy consumption and NVH of a range-extending hybrid vehicle according to claim 6, wherein when the average temperature of the high-voltage battery is lower than 0 ℃ or higher than 50 ℃ and the maximum allowable discharge power of the high-voltage battery is lower than 10kW, the whole vehicle controller VCU controls the range extender generator FISG to start and generates power in a power following mode; And detecting the average temperature of the high-voltage battery, when the average temperature of the high-voltage battery is more than 10 ℃ and less than 45 ℃, and the sum of the power calculated in the fixed-point power generation mode and the maximum allowable discharge power of the high-voltage battery is more than the required power of the whole vehicle, controlling the range extender generator FISG to generate power in the fixed-point power generation mode by the VCU until the actual SOC of the high-voltage battery is more than or equal to 70%, controlling the range extender generator FISG to stop generating power by the VCU, and stopping generating power.
8. The method for controlling energy-saving oil consumption and NVH of a range-extended hybrid vehicle according to claim 1, wherein when the actual power consumption of the vehicle is in a Cheng Qigao-extended effective area and the high-voltage battery SOC is less than or equal to 50%, the vehicle controller VCU controls the range extender generator FISG to start and takes down both the required power of the vehicle and the maximum allowable power of the range extender to generate power; When the actual power consumption of the whole vehicle is not in the Cheng Qigao effective area, the whole vehicle controller VCU controls the range extender generator FISG to generate power in a fixed-point power generation mode until the actual SOC of the high-voltage battery is more than or equal to 70%, and the whole vehicle controller VCU controls the range extender generator FISG to stop generating power, so that the oil consumption is effectively reduced; wherein the effective area of the increase Cheng Qigao is 40Kw-65Kw, and is calibrated according to a matched range extender.
9. The control method for the energy-saving oil consumption and the NVH of the range-extending hybrid vehicle is characterized by detecting that the SOC of a high-voltage battery of the range-extending hybrid vehicle is more than 30 percent and the vehicle speed is lower than 30km/h, and adopting pure electric driving, wherein the SOC of the high-voltage battery of the range-extending hybrid vehicle is less than 30 percent and the vehicle speed is lower than 30km/h, and the power of a range extender generator FISG is low, so that the NVH of the whole range-extending hybrid vehicle is reduced.
10. The control method for reducing energy consumption and NVH of the range extender hybrid vehicle according to claim 1, wherein the whole vehicle controller VCU is communicated with a power extender Cheng Qizong to form a controller RCU and a motor controller GCU, is responsible for collecting operation parameters in real time, executing a preset control strategy and dynamically adjusting the start and stop of a range extender generator, a power generation mode and whole vehicle power distribution; The range extender assembly controller RCU is used for communicating with the whole vehicle controller VCU, receiving the issued global control instruction, and combining the running state parameters of the range extender assembly, accurately regulating and controlling the start and stop, the rotating speed, the generating power and the working mode of the range extender engine FISG to ensure that the range extender engine Cheng Qizong runs in a high-efficiency, low-noise and stable state; The motor controller GCU is used for communicating with the whole vehicle controller VCU and realizing power generation, power supply and driving in cooperation with the whole vehicle controller VCU and the range extender assembly controller RCU.

Description

Control method for energy-reducing oil consumption and NVH (noise and harshness) of range-extending hybrid electric vehicle Technical Field The invention relates to the technical field of control of range-extending hybrid electric vehicles, in particular to a control method for reducing energy consumption and NVH of a range-extending hybrid electric vehicle. Background The range-extending hybrid electric vehicle has more and more application scenes in the market, wherein in an urban cold chain distribution scene, the storage position is generally a suburban area or an industrial area, and a sales shop from the urban center is generally far away, the cold chain distribution is more suitable for range-extending hybrid electric vehicles, the range-extending mileage requirement can be met, and the range-extending hybrid electric vehicle is better than the traditional fuel vehicle in economy, and because the distribution is mainly in the evening to early morning, and the distributed storefronts are all near populated areas and schools, the range extender power generation start-stop control method is required to meet the requirements of saving fuel consumption and reducing noise. For example, a chinese patent document with publication number CN106828128a discloses a control method of an extended range electric vehicle and an extended range electric vehicle, which belong to the field of vehicles, so as to give consideration to lower fuel consumption and better NVH performance. The method comprises the steps of establishing a nonlinear mapping relation between each of fuel consumption rate, engine vibration intensity and radiation noise sound pressure level and the rotation speed and the effective torque of a range extender, obtaining an objective function of each of the fuel consumption rate, engine vibration intensity and radiation noise sound pressure level according to the nonlinear mapping relation, performing multi-objective optimization on working points of the range extender according to each obtained objective function, wherein the multi-objective is reduction of the engine vibration intensity, radiation noise sound pressure level and the fuel consumption rate, the problems that the power generation mode singly adopts fixed power generation or simply follows the power requirement of the whole automobile to generate power, dynamic adjustment is not fully combined with an operation area of Cheng Qigao and a high-voltage battery state SOC (system on a chip), the temperature and the like, so that the oil consumption control effect is poor, the economic requirement of a cold chain distribution vehicle is difficult to meet, the special noise control scheme is not designed for a low-speed and population dense area, the range extender still can still operate in a high-power mode to generate noise, the noise is not obvious, the environment protection and the urban environment protection is not met, the temperature is not well-polluted, the problem of the problem that the temperature of the three-friendly and the current battery is very low, the problem of the problem that the current power consumption is difficult to respond to the problem is solved, and the problem of the existing method is poor in the power consumption is solved, and the problem is poor in the current situation that the problem is easy to be well. Disclosure of Invention Based on the technical problem that the control logic of the conventional range-extending hybrid vehicle cannot well reduce oil consumption and control NVH, the invention provides a control method for reducing energy oil consumption and NVH of the range-extending hybrid vehicle. The invention provides a control method for energy-saving oil consumption and NVH (noise, vibration and harshness) of a range-extending hybrid vehicle, which comprises a driving motor, a range extender assembly and a high-voltage battery, and also comprises a whole vehicle controller VCU, a Cheng Qizong-formed controller RCU and a motor controller GCU; the range extender assembly consists of an engine and a generator FISG; The control method includes the following steps; detecting the SOC of the high-voltage battery; Detecting an average temperature of the high-voltage battery; Detecting the whole vehicle power consumption of the range-extending hybrid electric vehicle; and selecting a control strategy according to the detected SOC of the high-voltage battery, the average temperature of the high-voltage battery and the required power of the range-extending hybrid electric vehicle. Preferably, according to the detected high-voltage battery SOC interval, the whole vehicle controller VCU controls the generator FISG of the range extender to start and stop. Preferably, the SOC of the high-voltage battery is less than or equal to 30%, the whole vehicle controller VCU controls the range extender generator FISG to start, and the power calculated in the fixed-point power generation mode is used for generating powe