| AUTOMOTIVE ENGINEERING |
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Modeling and simulation of gear shifting in clutchless coupled motor-transmission system |
| CHEN Hongxu, TIAN Guangyu |
| State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China |
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Abstract Clutchless coupled motor-transmission system characteristics often change, so models are needed to predict their gear shifting characteristics. This study uses multi-body dynamics and hybrid system theories to build a hybrid automaton model of the gear shifting process in the clutchless coupled system. The shifting quality of the clutchless coupled system is then analyzed for various shifting forces and relative rotational positions and speeds of sleeve and the clutch gear. The clutchless coupled system can provide better shifting quality than systems with clutches by actively controlling the motor torque and shifting force.
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| Keywords
electric vehicle
motor-transmission coupled system
gear shifting
clutchless
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Issue Date: 15 February 2016
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2016,
Vol. 56
