4WS Technology and the Prospects for Improvement of Vehicle Dynamics

Paper #:
  • 901167

Published:
  • 1990-10-01
Citation:
Irie, N. and Kuroki, J., "4WS Technology and the Prospects for Improvement of Vehicle Dynamics," SAE Technical Paper 901167, 1990, https://doi.org/10.4271/901167.
Pages:
9
Abstract:
FOUR-WHEEL STEERING (4WS) is beginning to find widespread use as a new approach to improving vehicle dynamics, especially in the medium and high speed ranges. Steering the rear wheels in the same phase as the front wheels enhances vehicle stability. Four-wheel steering systems have an even greater potential to improve stability and steering response through suitable control over the transient characteristics of the rear wheel steer angle.This paper traces the course of Nissan research and development work on four-wheel steering and the evolution of Nissan's HICAS (4WS) technology. It also describes research activities under way on vehicle dynamics using a newly developed Simulator Vehicle, equipped with a front and rear angle transient control system which makes it possible to vary the dynamic characteristics of the vehicle instantaneously and at will while driving.
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