Study of Torque Vectoring for All-Wheel-Drive Vehicles

This article presents a novel approach to the control of modern torque-vectoring differentials based on the concept of Beta-angle minimization. Three case studies include two variants of a base case model; with three open differentials, a 70/30-30/70 switchable centre differential with open front and rear and a fully left-to-right vectoring front and rear differential capable of any ratio of torque distribution (the centre differential is left open). All three are examined as they progress through an ISO double-lane change manoeuvre. Beta-angle control was chosen because one attribute of a nimble car is its ability to accelerate through a double-lane change manoeuvre without excessive magnitude or oscillation (so-called fish-tailing) in vehicle beta-angle. Each increase in the complexity of torque vectoring demonstrated a significant reduction in the magnitude of beta-angle witnessed during the manoeuvre. As torque vectoring can also be employed to enhance yaw dynamics, the simulations were performed in such a manner as to produce nearly identical paths between the three models; this allowed the direct affect on beta-angle to be understood without the added complexity of considering active yaw control influences.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 313-320
  • Monograph Title: Proceedings of the 19th Symposium of the International Association for Vehicle System Dynamics
  • Serial:
    • Vehicle System Dynamics
    • Volume: 44
    • Issue Number: Supplement
    • Publisher: Taylor & Francis
    • ISSN: 0042-3114
    • EISSN: 1744-5159

Subject/Index Terms

Filing Info

  • Accession Number: 01046823
  • Record Type: Publication
  • ISBN: 9780415436168
  • Files: TRIS
  • Created Date: Apr 9 2007 3:23PM