| 摘要 |
PURPOSE:To shorten the brake distance by increasing the set value for the slip rate determined according to a pseudo-automobile-speed and a wheel speed for a prescribed time after a certain wheel acceleration speed is detected, in the decompression control for the brake hydraulic pressure at the time when the slip rate reaches the set value. CONSTITUTION:The wheel speed Vw is calculated in a wheel-speed detecting circuit 2 on the basis of the output of a wheel-speed sensor 1, and the acceleration/ deceleration speed of the wheel is detected in an acceleration/deceleration speed detecting circuit 3 from the wheel speed Vw. A pseudo-automobile-speed Vi is generated at each input of the H-signal outputted from a comparison circuit 5 when the detected deceleration speed becomes over a standard deceleration speed b1, in a pseudo-automobile- speed generating circuit 4 on the basis of the wheel speed Vw. An aimed wheel-speed Vw0 is generated in an aimed wheel-speed generating circuit 6 on the basis of the above-described pseudo-automobile-speed Vi and the slip rate with which the brake efficiency becomes close to the max. on the basis of the pseudo-automobile-speed Vi. In this case, the aimed wheel-speed generating circuit 6 is constituted so that the set value of the slip rate is increased for a prescribed time after a predetermined certain wheel acceleration speed is detected. |
