Modeling and simulation of gear shifting in clutchless coupled motor-transmission system

CHEN Hongxu; TIAN Guangyu

doi:10.16511/j.cnki.qhdxxb.2015.22.022

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Journal of Tsinghua University(Science and Technology) ›› 2016, Vol. 56 ›› Issue (2) : 144-151. DOI: 10.16511/j.cnki.qhdxxb.2015.22.022

AUTOMOTIVE ENGINEERING

Modeling and simulation of gear shifting in clutchless coupled motor-transmission system

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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.

Key words

electric vehicle / motor-transmission coupled system / gear shifting / clutchless

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CHEN Hongxu, TIAN Guangyu. Modeling and simulation of gear shifting in clutchless coupled motor-transmission system[J]. Journal of Tsinghua University(Science and Technology). 2016, 56(2): 144-151 https://doi.org/10.16511/j.cnki.qhdxxb.2015.22.022

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