| 摘要 |
PURPOSE:To compensate the delay of response of a deceleration responding valve, by providing a pressure difference valve responsive to the pressure increase speed of inlet hydraulic pressure between the deceleration responding valve and a confining chamber. CONSTITUTION:A pressure liquid from a master cylinder 36 is led via a chamber 33, an orifice 25a, and a chamber 31 into a control valve CV, and the pressure thereof is proportionally decreased and is transmitted to a rear wheel brake. On the other hand, the pressure liquid passed through the deceleration responding valve GV reaches the confining chamber 10a via the pressure difference valve DV to control the pressing force of a spring 15. The pressure difference valve DV is pressed by an actuator 25 arranged to the orifice 25a through a spring 27, and thus the working pressure of the difference pressure valve can response to the speed of increase in the inlet hydraulic pressure. If the deceleration of the vehicle is behind the increase in the hydraulic pressure due to abrupt braking, the confining pressure can be precisely controlled and therefore the control of turning point becomes accurate. |
