Title: Observer-based feedback control during torque phase of clutch-to-clutch shift process

Authors: Bingzhao Gao; Hong Chen; Jun Li; Kazushi Sanada; Lu Tian

Addresses: State Key Laboratory of Automotive Simulation and Control, Jilin University (Campus NanLing), Renmin Str. 5988, Changchun 130025, China; Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-Ku, Yokohama 240-8501, Japan. ' 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. ' R&D Center, China FAW Group Corporation, No. 1063 Chuangye Street, Changchun 130011, China. ' Department of Mechanical Engineering Yokohama National University 79-5, Tokiwadai, Hodogaya-Ku, Yokohama, 240-8501, Japan. ' Department of Control Science and Engineering, Jilin University (Campus NanLing), Renmin Str. 5988, Changchun 130025, China

Abstract: In order to improve the shift quality of Automatic Transmissions (ATs) adopting clutch-to-clutch shift technology, a feedback control strategy is proposed for the torque phase of shift process. With the estimated clutch torque, the off-going clutch is disengaged at the moment when transmitted torque is approaching zero, which contributes to the reduction of shift shock and prevention of clutch tie-up. The proposed control strategy is tested on a complete powertrain simulation model. It is verified that the system is robust to the variations of driving conditions, such as vehicle mass and road grade, etc.

Keywords: automatic transmission; clutch-to-clutch shift; torque observers; feedback control; shift control; clutch control; clutch torque; powertrain simulation; modelling; driving conditions; vehicle transmissions; vehicle design.

DOI: 10.1504/IJVD.2012.045925

International Journal of Vehicle Design, 2012 Vol.58 No.1, pp.93 - 108

Available online: 19 Mar 2012 *

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