| 摘要 |
PURPOSE:To reduce the turning radius of car by employing the turret to be set on the basis of car speed, steering angle, etc. as a target level to perform steering of rear wheel thus to obtain proper steering angle of rear wheel corresponding to the front wheel steering. CONSTITUTION:Outputs from car speed sensor 2, front wheel steering angle sensor 3, steering angle speed sensor 4 and steering angle acceleration sensor 5 are fed to retrieval circuit 1. A memory 6 prestored with plural types of optimal target yaw rate data for matching the rear wheel locus with front wheel locus when steering as the referential data corresponding to car speed, front wheel steering angle, steering angle speed and steering angle acceleration is connected to said circuit 1. The target yaw rate retrieved on the basis of said sensor output is produced from an arithmetic unit 1 as a set yaw rate to control a rear wheel steering actuator 8 through an output circuit 7 in accordance with the output from a comparator 9 for comparing the set yaw rate with the actually measured yaw rate. |
