Torque-fill control and energy management for a 4-wheel-drive electric vehicle layout with 2-speed transmissions

De Pinto, S, Camocardi, P, Sorniotti, A, Gruber, P, Perlo, P and Viotto, F (2016) Torque-fill control and energy management for a 4-wheel-drive electric vehicle layout with 2-speed transmissions IEEE Transactions on Industry Applications.

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Abstract

This paper presents a novel 4-wheel-drive electric vehicle layout consisting of one on-board electric drivetrain per axle. Each drivetrain includes a simplified clutch-less 2-speed transmission system and an open differential, to transmit the torque to the wheels. This drivetrain layout allows eight different gear state combinations at the vehicle level, thus increasing the possibility of running the vehicle in a more energy efficient state for the specific wheel torque demand and speed. Also, to compensate the torque gap during gearshifts, a ‘torque-fill’ controller was developed that varies the motor torque on the axle not involved in the gearshift. Experimental tests show the effectiveness of the developed gearshift strategy extended with the torque-fill capability. Energy efficiency benefits are discussed by comparing the energy consumptions of the case study vehicle controlled through a constant front-to-total wheel torque distribution and conventional gearshift maps, and the same vehicle with an energy management system based on an off-line optimization. Results demonstrate that the more advanced controller brings a significant reduction of the energy consumption at constant speed and along different driving cycles.

Item Type:	Article
Subjects :	Mechanical Engineering
Divisions :	Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :	Name Email ORCID De Pinto, S Camocardi, P Sorniotti, A Gruber, P Perlo, P Viotto, F
Date :	2016
Copyright Disclaimer :	(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Related URLs :	Publisher
Depositing User :	Symplectic Elements
Date Deposited :	10 Aug 2016 10:28
Last Modified :	31 Oct 2017 18:34
URI:	http://epubs.surrey.ac.uk/id/eprint/811656

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