Title: Simultaneous design of the gear ratio and gearshift strategy for a parallel hybrid electric vehicle equipped with AMT

Authors: Morteza Montazeri-Gh; Zeinab Pourbafarani

Addresses: School of Mechanical Engineering, Systems Simulation and Control Laboratory, Iran University of Science and Technology, Tehran, Iran ' School of Mechanical Engineering, Systems Simulation and Control Laboratory, Iran University of Science and Technology, Tehran, Iran

Abstract: This paper presents an optimal approach for the simultaneous design of gear ratios and gear shifting strategy for a parallel HEV equipped with AMT. For this purpose, an AMT model with a double sided clutch is initially provided and integrated into a pre-transmission parallel HEV model for vehicle powertrain performance evaluation. To optimise the gearshift strategy and gear ratios, a GA process is then performed for several traffic conditions of Tehran driving cycle. This study reveals that simultaneous optimisation of HEV gear ratios and gearshift strategy noticeably improves vehicle fuel economy and emissions.

Keywords: parallel HEVs; hybrid electric vehicles; AMT; automated manual transmission; double sided clutch; DCT; dual clutch transmission; gearshift strategy; gear ratio; driving conditions; GAs; genetic algorithms; gear ratio; vehicle design; Iran; traffic conditions; fuel economy; vehicle emissions.

DOI: 10.1504/IJVD.2012.047389

International Journal of Vehicle Design, 2012 Vol.58 No.2/3/4, pp.291 - 306

Received: 05 Nov 2010
Accepted: 19 Apr 2011
Published online: 31 Dec 2014 *

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