| 摘要 |
PURPOSE:To choose an optimum characteristic among plural braking force distributive characteristics according to car weight, by installing plural P valves different in an operation starting point each in a row, while operating either of these P valves according to the car weight. CONSTITUTION:Two P valves 8 and 9 are installed inside a valve case 100 interposed between a master cylinder 1 and a rear wheel cylinder 6 in parallel. Setting force in an operation starting point setting spring 84 of the P valve 8 on one side is made larger while that of an operation starting point setting spring 94 of the P valve on the other is made smaller the other way, thus these P valves 8 and 9 are made to differ in each operation starting point. And, a selector valve 11 driven by a solenoid 11a is installed at the output side of the P valve 8. When car weight is small, a valve driving signal generating device 13 outputs a signal (a) with a signal (b) out of a wheel load detecting device 12, and the selector valve 11 is closed by this signal (a) whereby the P valve 9 controls hydraulic pressure. |
