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A novel clutchless multiple-speed transmission for electric axles

Sorniotti, A (2013) A novel clutchless multiple-speed transmission for electric axles International Journal of Powertrains, 2 (2/3). pp. 103-131.

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Fully electric vehicles and range-extended electric vehicles can be characterised by a multitude of possible powertrain layouts, many of them currently under investigation and comparison. This contribution presents a novel clutchless seamless four-speed transmission system which can be concurrently driven by two electric motor drives, for use in fully electric vehicles or electric axles for through-the-road parallel hybrid electric vehicles. The transmission system allows the electric motors to work in their high efficiency region for a longer period during a typical driving schedule. This paper describes the layout of the novel transmission system, the equations for modelling its dynamics and the criteria for the selection of the best gearshift maps for energy efficiency. Finally, an energy consumption and performance comparison between the novel drivetrain, a conventional single-speed electric drivetrain and a double-speed electric drivetrain is discussed in detail for two case study vehicles.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Date : 23 May 2013
Identification Number : 10.1504/IJPT.2013.054155
Additional Information : Published in International Journal of Powertrains, 2, 103-131.
Depositing User : Symplectic Elements
Date Deposited : 27 Mar 2014 10:21
Last Modified : 09 Jun 2014 13:51

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