Title: Coordinated control strategies for a full hybrid electric vehicle with single motor during mode changes

Authors: Bo Du; Datong Qin; Yang Yang

Addresses: School of Automobile and Transportation, Xihua University, Hong Guang Town, Pixian, Chengdu, 610039, China ' State Key Laboratory of Mechanical Transmission, Chongqing University, No. 174, Shazhengjie Street, Shapingba District, Chongqing, 400044, China ' State Key Laboratory of Mechanical Transmission, Chongqing University, No. 174, Shazhengjie Street, Shapingba District, Chongqing, 400044, China

Abstract: This paper presents the coordinated control strategies for a full hybrid vehicle with single motor during mode changes. The mode changes between various driving modes are firstly divided into three types according to the similar characteristics of mode transitions. For the first type of mode change, a coordinated control strategy expressed as the combination of clutch pressure fuzzy control and motor torque compensation is proposed. For the second type of mode change, a coordination control strategy of motor speed closed-loop control and clutch pressure control is developed. The coordinated control strategy expressed as the engine throttle opening rate control and motor torque compensation is adopted for the third type of mode change. Performance of these proposed control strategies is validated by experimental tests based on the test bench of the full hybrid drivetrain. The results show a remarkable improvement in drivability of the full hybrid vehicle during mode changes.

Keywords: FHEVs; full hybrid electric vehicles; mode changes; coordinated control; drivability; hybrid vehicles; driving modes; fuzzy control; motor torque compensation; motor speed control; closed-loop control; clutch pressure control; engine throttle opening rate control.

DOI: 10.1504/IJEHV.2016.076958

International Journal of Electric and Hybrid Vehicles, 2016 Vol.8 No.1, pp.19 - 40

Received: 26 Jun 2015
Accepted: 07 Dec 2015
Published online: 08 Jun 2016 *

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