Design and effectiveness of regenerative brake systems for Electric and Hybrid vehicles Background to research for this paper: There is increasing emphasis in global automotive industry in the development of low carbon vehicle technologies. A joint research project has been running for 2 years, partially funded by Advantage West Midlands (AWM), and the European Regional Development Fund (ERDF). The project includes both academic partners such as Coventry University and Warwick University, in addition to industrial partners such as MIRA Ltd., Ricardo, Tata Motors European Technical Centre (TMETC) and Jaguar Land Rover (JLR). ABSTRACT As part of the low carbon vehicles technology project, a study has been undertaking of the issues associated with regenerative braking control. ECE legislation places a number of constraints on the operation of these systems. Vehicle manufacturers have developed different control systems aimed at maximising the amount of energy recovered, making the best use of this opportunity to reduce carbon emissions. There are a number of issues that need to be addressed whilst designing these systems: Compliance with the braking legislation Providing good pedal feel and driver confidence Progressive and unobtrusive balancing of regenerative and friction braking forces Maximising energy recovery Effective ABS control of regenerative and friction braking forces
Whilst many vehicle manufacturers and their suppliers are spending considerable time and resources on investigating regenerative braking and control systems, there is very little information in the public domain about how well these systems work in practice, especially with respect to driver confidence and pedal feel. This paper seeks to contribute to the understanding of these systems and their effectiveness by Summarising the legal constraints on these systems and their implications on their design Detailing driver feedback from extensive subjective assessments...
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