| 摘要 |
PURPOSE:To secure the stability of a vehicle while improving the turning ability by providing a steering condition detecting means for detecting the steering condition, a running condition detecting means for detecting a vehicle speed or a lateral acceleration added to the vehicle, and a wheel controlling means. CONSTITUTION:A wheel control means steers rear wheels in the inverse phase through a rear wheel steering means when a detected value by a running condition detecting means is less than a predetermined value in response to signals from a steering condition detecting means and the running condition detecting means for detecting the steering condition, and the vehicle speed or lateral acceleration respectively at the time of turning. When the detected value is more than a predetermined value, wheel braking forces are set different between the inner side and outer side in the turning direction to produce a yaw moment for assisting this turn corresponding to the turning condition for the inner and outer wheels in the turning direction. The improvement of turning ability can thus be realized by reduction of an understeer tendency by inverse phase steering of rear wheels in a range where the vehicle speed or lateral acceleration is less than predetermined value, while if it is more than predetermined, it can be achieved by utilizing the differential braking force for braking the wheels. The stability is also secured. |
