| 摘要 |
PURPOSE:To execute brake control due to high hydraulic pressure on a road surface having a high friction coefficient, keeping a proper decompression characteristic on the road surface having a low friction coefficient, by carrying-out the hydraulic control for a brake hydraulic pressure with a gentle decompression characteristic when the friction coefficient between a wheel and the road surface is higher than a prescribed value. CONSTITUTION:An antiskid control circuit 100 controls the switching of an inflow valve (EV valve) 14 installed into passage leading from the master cyliinder 101 of a brake hydraulic system to a wheel cylinder 103 on the basis of the detection signal having the frequency proportional to the revolution speed of a wheel 102 which is detected by a car-speed sensor 1. Further, the control circuit 100 controls the switching of an effluence valve (AV valve) 15 installed in the forestage of a pump 17 and a reservoir tank 104 in a hydraulic-pressure recovery circuit which leads to the master cylinder 101 from the wheel cylinder 103 through a reservoir tank 104 and the liquid-pressure recovering pump 17. The hydraulic pressure of the wheel cylinder 103, namely the control liquid pressure is controlled by the switching signal for the EV valve 14 and the switching signal for the AV valve 15. |
