Title: Optimisation of AWD off-road vehicle performance using visco-lock devices

Authors: A.M. Sharaf, G. Mavros, H. Rahnejat, P.D. King, S.K. Mohan

Addresses: Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK. ' Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK. ' Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK. ' Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK. ' Magna Powertrain, 6600 New Venture Gear Drive, East Syracuse, NY 13057-1209, USA

Abstract: A comprehensive computer model is devised for the simulation of AWD off-road vehicle dynamics. Particular attention has been paid to the modelling of various visco-lock devices, including the viscous couplings and visco-lock limited-slip differentials. These devices are represented by fully parameterised physical models which capture the torque transmission mechanism represented by various thermodynamic, hydrodynamic, structural and mechanical modules. The characteristics of these devices can easily be altered so that comparisons can be made between different types. In addition, the influence of a wide range operating conditions, vehicle design parameters and tyre characteristics can also be made over various deformable soils.

Keywords: 4×4 off-road vehicles; terramechanics; AWD vehicle performance; vehicle modelling; visco-lock devices; vehicle dynamics; all wheel drive vehicles; viscous couplings; limited-slip differentials; torque transmission; vehicle design; tyre characteristics; deformable soils.

DOI: 10.1504/IJHVS.2008.022242

International Journal of Heavy Vehicle Systems, 2008 Vol.15 No.2/3/4, pp.188 - 207

Available online: 24 Dec 2008 *

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