| 摘要 |
<p>PURPOSE:To prevent the occurrence of handle draw-in phenomenon in which a wheel is steered by an amount more than predicted, by a method wherein a transmission ratio varying means to vary a transmission ratio according to a car speed is located in a steering force transmission route, and during the transient state of a vehicle, a transmission ratio is fixed. CONSTITUTION:A transmission ratio varying device 10 to vary a transmission ratio being a ratio between the rotation angle of a steering handle 2 and the steering angle of a wheel 6 is located between a handle shaft 3 and an intermediate shaft 4 of a steering device 1. The transmission varying device 10 is controlled by a controller 11 to which signals from a car speed sensor 12 and a handle steering angle sensor 13 are inputted. Namely, the controller 11 sets a transmission ratio according to a detecting car speed and computes a wheel steering angle from the transmission ratio and a handle steering angle, and controls the transmission ratio varying device 10 according to the computing result. In this case, when it is detected that a vehicle is in a transient state, e.g. acceleration, deceleration, control is effected so that the transmission ratio is fixed to a value prevailing right before a transient state.</p> |
