Page 1 of 10 Type Paper Number Here Regenerative Braking Strategies, Vehicle Safety and Stability Control Systems: Critical Use-Case Proposals Selim A. Oleksowicz, Keith J. Burnham Coventry University Adam Southgate JLR Chris McCoy TMETC Gary Waite Ricardo Graham Hardwick MIRA Cian Harrington Cranfield University Ross McMurran WMG Copyright © 2012 SAE International ABSTRACT The sustainable development of vehicle propulsion systems that have mainly focused on reduction of fuel consumption (i.e. CO 2 emission) has led, not only to the development of systems connected with combustion processes but also to legislation and testing procedures. In recent years, the low carbon policy has made hybrid vehicles and fully electric vehicles (H/EVs) popular. The main virtue of these propulsion systems is their ability to consume less energy, mainly because of the possibility to restore some of the expended energy from kinetic movement, e.g. in the braking process. Because of the above-mentioned interests new research and testing methods for H/EVs are currently being developed. This especially concerns the critical „use-cases‟ for functionality tests within dynamic events for both virtual simulations, as well as real-time road tests. Dynamic, as well as steady-state effects, should be considered in a vehicle stability event. In this case, a marginal improvement in the regenerative braking ratio can significantly improve the range of the vehicle and, therefore, the economic cost of its operation. In modern vehicles, vehicle dynamics control systems play the principal role in safety, comfort and economic operation. Unfortunately, however, the existing standard road test scenarios are insufficient for H/EVs. The paper presents the critical manoeuvres that are suitable for examination of the regenerative braking mode according to Active Driving Safety Systems operation (e.g. Electronic Brake-Force Distribution (EBD), Anti-Lock Brake System (ABS), and Electronic Stability Program (ESP)). The paper highlights one part of a major research programme, which has been conducted within an industrial and academic partnership namely the Low Carbon Vehicle Technology Project funded jointly by the European Regional Development Fund and Advantage West Midlands. INTRODUCTION Hybrid vehicles (HVs) and fully electric vehicles (EVs), as with conventional vehicles, are equipped with advanced active safety systems responsible for maintaining dynamic stability. The most recent research efforts focusing on the regenerative braking mode (re-gen mode) showed that the increase of the re-gen ratio (defined as the recaptured braking energy to