Title: Linear and non-linear methods to analyse the drivability of a through-the-road parallel hybrid electric vehicle

Authors: Thomas Holdstock; Aldo Sorniotti; Suryanto; Leo Shead; Fabio Viotto; Carlo Cavallino; Stefano Bertolotto

Addresses: University of Surrey, Guildford, Surrey, GU2 7XH, UK ' University of Surrey, Guildford, Surrey, GU2 7XH, UK ' University of Surrey, Guildford, Surrey, GU2 7XH, UK ' University of Surrey, Guildford, Surrey, GU2 7XH, UK ' Oerlikon Graziano SpA, Via Cumiana 14, 10098 Rivoli (Torino), Italy ' Oerlikon Graziano SpA, Via Cumiana 14, 10098 Rivoli (Torino), Italy ' Oerlikon Graziano SpA, Via Cumiana 14, 10098 Rivoli (Torino), Italy

Abstract: This paper deals with the simulation of the low frequency drivability of through-the-road parallel (TTRP) hybrid electric vehicles (HEVs). The current literature relating to HEVs is predominantly focused on energy efficiency optimisation. However, the drivability of this HEV typology can be particularly critical, due to the interaction of the front and rear axle dynamics. The article presents an experimentally validated non-linear model of a TTRP HEV, consisting of a front axle driven by an internal combustion engine (ICE) with a six-speed transmission, and a rear axle powered by an electric motor with a prototype two-speed transmission. The simulated TTRP HEV is then considered with both driven axles, and drivability manoeuvres in conditions of constant gear are carried out. The results are analysed to study acceleration and jerk profiles, and understand the anti-jerk control system fundamentals through linearisation methods.

Keywords: through-the-road parallel HEVs; TTRP; hybrid electric vehicles; simulation; linear; nonlinear modelling; low frequency drivability; acceleration profiles; jerk profiles; anti-jerk control.

DOI: 10.1504/IJPT.2013.052664

International Journal of Powertrains, 2013 Vol.2 No.1, pp.52 - 77

Received: 07 Feb 2012
Accepted: 30 Aug 2012
Published online: 19 Jul 2014 *

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