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4WS Technology and the Prospects for Improvement of Vehicle Dynamics
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English
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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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.Also In
References
- Maeda T. Irie N. “Performance of Driver-Vehicle System in Emergency Avoidance” SAE 770130 1977
- Fukunaga Y. et al “Improved Handling and Stability using Four-Wheel Steering” ESV Conference 11 1987
- Irie N. et al “Hicas-Improvement of Vehicle stability and Controllability by Rear Suspension Steering Characteristics” FISITA 865114 1986
- Eguti T. et al “Development of SUPER HICAS” SAE 891978 1989
- Akatsu Y. et al “An Active Sasupension Employing an Electro- hydraulic Pressure Control Systems” FISITA 905123 1990