Title: Modelling and control of handling dynamics for a hydrostatically driven vehicle

Authors: Justin Sill, Sisay Molla, Beshah Ayalew

Addresses: Clemson University International Center for Automotive Research, 4 Research Dr., 342 CGEC, Greenville, SC 29607, USA. ' Clemson University International Center for Automotive Research, 4 Research Dr., 342 CGEC, Greenville, SC 29607, USA. ' Clemson University International Center for Automotive Research, 4 Research Dr., 342 CGEC, Greenville, SC 29607, USA

Abstract: This paper presents a model for analysing the handling dynamics and lateral stability control of a vehicle featuring a hydrostatic independent wheel drive system for integrating energy efficiency with safety. The stability control system determines the necessary corrective yaw moment and achieves correction of oversteer or understeer via a controlled differential actuation of the wheel-end hydraulic pump/motors. During aggressive handling manoeuvres, the motors can be operated as pumps for re-generating the vehicle|s kinetic energy into on-board hydraulic accumulators. This system has the distinct benefit of avoiding excessive activation of the friction brakes as is common in current stability control technology.

Keywords: hydrostatic drives; hydraulic hybrid vehicles; handling control; handling dynamics; lateral stability control; accumulators; hydraulic pumps; hydraulic motors; independent wheel drives; energy efficiency; vehicle safety; yaw moment; oversteer; understeer; kinetic energy.

DOI: 10.1504/IJHVS.2011.041599

International Journal of Heavy Vehicle Systems, 2011 Vol.18 No.3, pp.322 - 340

Published online: 27 Jul 2011 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article