Title: Multi-speed torque coupler of hybrid electric vehicle to exploit energy reduction potential

Authors: Bingzhao Gao; Hanqi Yue; Hong Chen

Addresses: State Key Laboratory of Automotive Simulation and Control, Jilin University, Renmin Str. 5988, Changchun 130025, China ' State Key Laboratory of Automotive Simulation and Control, Jilin University, Renmin Str. 5988, Changchun 130025, China ' State Key Laboratory of Automotive Simulation and Control, and Department of Control Science and Engineering, Jilin University, Renmin Str. 5988, Changchun 130025, China

Abstract: A novel torque-coupling architecture for hybrid electric vehicles is proposed to exploit energy-reduction potential. One engine and two motors serve as the power sources. The torque-coupling device is based on automated manual transmission (AMT), which is highly efficient and provides six gears for the engine and three gears for each motor to enable the engine and the motors to work at high-efficiency levels in most cases. A smooth shifting process without torque hole is also attained through a deliberately designed control scheme for the power sources and the sliding sleeves. The performance of the proposed power-shift AMT (P-AMT) is evaluated through several simulations. The comparison between the proposed P-AMT and an electronic continuously variable transmission (ECVT) shows the potential of the proposed architecture in terms of fuel economy and acceleration performance.

Keywords: hybrid electric vehicles; HEVs; hybrid vehicles; multi-speed torque coupler; power-shift AMT; automated manual transmission; fuel economy; energy reduction potential; simulation; electronic CVT; continuously variable transmission; ECVT.

DOI: 10.1504/IJVD.2015.073129

International Journal of Vehicle Design, 2015 Vol.69 No.1/2/3/4, pp.255 - 272

Received: 11 Oct 2014
Accepted: 11 Jun 2015

Published online: 20 Nov 2015 *

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