Launching and gear shifting coordinated control of a two motor HEV driving system(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年03期
- Page:
- 117-126
- Research Field:
- 交通工程
- Publishing date:
Info
- Title:
- Launching and gear shifting coordinated control of a two motor HEV driving system
- Author(s):
- ZHANG Nong; ZHOU Shilei; ZHU Bo2; ZHANG Bangji; ZHENG Minyi
- (1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, Hunan, China; 2. Automotive Research Institute, Hefei University of Technology, Hefei 230009, Anhui, China; 3. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei 230009, Anhui, China)
- Keywords:
- automotive engineering; power interruption; coordinated control; hybrid electric vehicle; cosimulation
- PACS:
- -
- DOI:
- -
- Abstract:
- To solve the problem of power interruption during gear shifting of AMT in traditional hybrid electric vehicle (HEV) with automatic transmission, a HEV system that consists of one engine, two motors, and transmission with four gear ratios was proposed. By controlling the engine, motors, clutches, and synchronizers of hybrid driving system, it could work in electrical driving mode, parallel hybrid driving mode, series hybrid driving mode, regenerative braking mode, and driving charging mode. The system was equivalent to a massspringdamping system adopting the lump inertia method and Newtons second law, from which the dynamic equations were built. The engine model and electric motor model were built through the lookup table method. The modeswitching control strategy and gearshifting control strategy were designed according to the driving system structure characteristics. The output torque of the engine and motors were coordinately controlled during mode switching and gear shifting based on the torque response characteristics. The electric motor torque compensation control strategy based on engine output torque was designed to maintain the vehicle driving torque and eliminate torque interruption. The vehicle model and control model were built with the AMESim and MATLAB/Simulink software, which were used to simulate the vehicle launching process and gear shifting process. The results show that the HEV system ensures the smooth change of output torque without power interruption during gear shifting. Vehicle jerks during mode switching and gear shifting are limited, by controlling the change rate of engine and motor output torque, as well as engaging and disengaging the speed of clutches and synchronizers. 4 tabs, 17 figs, 22 refs.
Last Update: 2019-05-23