Title: Sliding mode control of shifting process based on throttle opening and vehicle mass variations

Authors: Peipei Luo; Yuhui Hu; Xingfu Nie; Junqiang Xi

Addresses: School of Mechanical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Haidian District, Beijing 100081, China ' School of Mechanical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Haidian District, Beijing 100081, China ' Auto Drive Engineering Research Institute, Shaanxi Fast Gear Co., Ltd., No. 129 West Road, Changan Science and Technology Industrial Park, Xi'an 710119, China ' School of Mechanical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Haidian District, Beijing 100081, China

Abstract: In order to reduce the friction work in the inertial phase of shifting process of heavy-duty vehicle (HDV), a complete vehicle model and a shifting process model are built firstly to analyse the dynamical character of automatic transmission (AT)'s shifting process. Then, throttle opening and vehicle mass are introduced as modification in the inertial phase control, and the friction elements' speed difference is treated as control objective. A sliding mode control (SMC) is adapted to realise this control, and shows a better target tracing feature than the conventional PID control. The results of real vehicle test verify the proposed control strategy, and the vehicle has a good shifting behaviour.

Keywords: automatic transmission; inertial phase control; throttle opening; vehicle mass; SMC; sliding mode control; shifting process; friction reduction; heavy duty vehicles; heavy vehicles; vehicle modelling; automatic shift; shifting control.

DOI: 10.1504/IJEHV.2015.071082

International Journal of Electric and Hybrid Vehicles, 2015 Vol.7 No.2, pp.159 - 175

Available online: 11 Aug 2015 *

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