Four-wheel steering gear for vehicle

Abstract

Abstract PURPOSE:To allow smooth steering angle control of rear wheels relative to front wheels in dependent upon a vehicular speed from a very low speed region to a low and medium speed region, by controlling a rear wheel steering gear according to characteristics of a rear wheel steering angle relative to a front wheel steering angle. CONSTITUTION:A steering direction of front wheels 1 is inputted as an output 4a from a front wheel steering angle sensor 4 to a controller 10. The controller 10 outputs a control signal, following such characteristics as shown in the drawing, in dependent upon an input thetaH from a steering angle sensor 4 and an input V from a vehicular speed sensor 12, thereby allowing rear wheels to be steered. The characteristics of a rear wheel steering angle thetaR relative to a front wheel steering angle thetaF is such that a converging point of inflection points P in dependent upon decrease in a vehicular speed (v) coincides with a reverse phase start point where the zero phase of a rear wheel steering angle is changed to a reverse phase at a very low speed region. Therefore, it is possible to conduct a smooth steering angle control of rear wheels relative to front wheels in response to change in a vehicular speed from a very low speed region to a low and medium speed region.

Inventors

• 👤 Hirotaka Kanazawa
• 👤 金澤　啓隆
• 👤 Teruhiko Takatani
• 👤 高谷　輝彦
• 👤 Naoto Takada
• 👤 直人 高田

Bibliographic Details