Title: Model-based control of automotive step-ratio transmissions

Authors: Bingzhao Gao; Hong Chen

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

Abstract: Step-ratios transmissions including automated manual transmission (AMT), automatic transmission (AT) and dual clutch transmission (DCT), have fixed gear ratios, and the gear ratio changes abruptly within a short time when vehicle is launched or gear shift is operated. The longitudinal dynamic control must be addressed to achieve satisfied drivability during start-up and shift process. The researches about the dynamics and control of step-ratio transmissions and clutches are reviewed, and some possible control opportunities are pointed out. The step-ratio transmissions adopted by hybrid electric vehicles (HEVs) and electric vehicles (EVs) are introduced as well.

Keywords: automated manual transmission; AMT; automatic transmission; dual clutch transmission; DCT; inverse AMT; I-AMT; estimation; model-based control; step-ratio transmissions; longitudinal dynamic control; hybrid electric vehicles; HEVs.

DOI: 10.1504/IJPT.2014.060885

International Journal of Powertrains, 2014 Vol.3 No.2, pp.197 - 220

Available online: 02 May 2014 *

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