Braking energy recovery strategy for rear-drive pure electric commercial vehicle
Braking energy recovery strategy for rear-drive pure electric commercial vehicle
- Neue Suche nach: LYU YIHENG
- Neue Suche nach: ZHANG GUOFANG
- Neue Suche nach: ZOU XIAOJUN
- Neue Suche nach: SONG WEI
- Neue Suche nach: GE GUOXUE
- Neue Suche nach: WANG TAO
- Neue Suche nach: LYU YIHENG
- Neue Suche nach: ZHANG GUOFANG
- Neue Suche nach: ZOU XIAOJUN
- Neue Suche nach: SONG WEI
- Neue Suche nach: GE GUOXUE
- Neue Suche nach: WANG TAO
The invention discloses a braking energy recovery strategy for a rear-drive pure electric commercial vehicle, which is suitable for an H-shaped hydraulic pipeline layout vehicle model, and comprises the following steps: a brake pedal sensor or a pedal travel sensor transmits a brake signal to a whole vehicle controller to calculate the brake strength Z; the vehicle control unit judges whether motor braking is started or not according to limiting conditions such as battery characteristics, motor characteristics and accelerator pedal signals; and when the SOC value and the vehicle speed meet the constraint, the motor is started for braking, and the ideal front and rear axle braking torque is calculated according to the braking strength Z and the ideal braking force distribution curve. The front axle hydraulic brake directly adopts the calculated front axle torque, and the hydraulic braking torque of the rear axle is calculated according to a fixed ratio. Meanwhile, the maximum braking torque which can be provided by the motor is calculated according to the rotating speed of the motor, part of the braking torque of the rear axle is supplemented (or offset) through the motor, the total braking torque of the rear axle is made to be close to the calculated ideal value as much as possible, and on the premise that the braking stability is kept, the energy recovery rate is increased, and the braking distance is reduced.
本发明公开了一种后驱纯电动商用车制动能量回收策略,适用于“H”型液压管路布局车型，包括，制动踏板传感器或踏板行程传感器将制动信号传给所述整车控制器以计算制动强度Z；整车控制器根据电池特性、电机特性、加速踏板信号等限制条件判断是否启动电机制动；当SOC值、车速满足约束时，启动所述电机进行制动，并依据制动强度Z的大小，根据理想制动力分配曲线计算理想的前后轴制动力矩。前轴液压制动器直接采纳算得的前轴力矩，后轴的液压制动力矩由固定比值计算。同时依据电机转速计算出所述电机能提供的最大制动力矩，用电机补充（或抵消）部分后轴制动力矩，尽可能使后轴总的制动力矩接近算得的理想值，以保持制动稳定性为前提，提高能量回收率，减少制动距离。
Dokumentinformationen
Braking energy recovery strategy for rear-drive pure electric commercial vehicle
一种后驱纯电动商用车制动能量回收策略
2021-07-23
Patent
Elektronische Ressource
Chinesisch
| IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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