Optimized control of engine start assisted by the disconnect clutch in a P2 hybrid automatic transmission
| Autor: | Xiangyang Xu, Peter Tenberge, Mick Jordan, Yinghua Liang, Peng Dong |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Automatic transmission Computer science Mechanical Engineering Process (computing) Aerospace Engineering PID controller 02 engineering and technology 01 natural sciences Automotive engineering Computer Science Applications law.invention 020901 industrial engineering & automation Control and Systems Engineering law Control theory 0103 physical sciences Signal Processing Trajectory Solenoid valve Clutch Hybrid vehicle 010301 acoustics Civil and Structural Engineering |
| Zdroj: | Mechanical Systems and Signal Processing. 124:313-329 |
| ISSN: | 0888-3270 |
| Popis: | Instead of using conventional starter, engine can be started through slipping of the disconnect clutch in P2 hybrid automatic transmission. However, both riding comfort and engine-start time are challenges for control of the starting process. In order to achieve smooth and quick engine start, this paper proposed an optimized control strategy with respect to different engine-start situations. Firstly, a model of P2 hybrid powertrain is developed to characterize the transient behavior during engine start and provide support for developing control strategies. A multiphase control strategy is then proposed to cope with the control objective of either good riding comfort or short starting time depending on different driving situations. A nonlinear feedforward-feedback controller based on differential flatness and proportional-integral-derivative (PID) algorithm is developed to regulate the current of direct operating solenoid valve. Thus the pressure of the disconnect clutch can be fine-tuned and good tracking capability for the reference trajectory of engine speed can be realized. Finally, simulation and test results demonstrate that the proposed control strategy and controller can satisfy different requirements for engine start. Both riding comfort and engine-start time of a P2 hybrid vehicle can be effectively improved in the engine starting process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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