| 摘要 |
PROBLEM TO BE SOLVED: To provide a steering control device for a vehicle capable of eliminating the uncomfortable feeling of steering by a driver without any influence on traveling stability when a steering angle ratio control function cannot be continued due to a failure of a vehicle speed detecting device during traveling. SOLUTION: This steering control device for the vehicle has a steering shaft connected to a steering operation means steered by a driver, a steered shaft connected to steered wheels but not mechanically connected to the steering shaft, the vehicle speed detecting means which detects vehicle speed, and a steering angle ratio control means which controls the steering angle ratio of the steered angle of the steered shaft to the steering angle of the steering shaft based on vehicle speed detected by the vehicle speed detecting means. This steering control device further has a control device for a failure which fixes a value of the steering angle ratio calculated by the steering angle ratio control means right before the failure is determined when the vehicle speed detecting means determines the failure while executing steering angle ratio control by the steering angle ratio control means. COPYRIGHT: (C)2009,JPO&INPIT |
