| 摘要 |
A proportioning valve (10, 110) in a master cylinder housing (12, 112) is pressure responsive to control the flow of fluid to a wheel brake cylinder. The proportioning valve (10, 110) is connected to a fluid channel (31, 131) opening into the master cylinder reservoir (13, 113), a second valve (34, 134) being disposed at the opening (32, 132) and being engaged by an inertia sensitive ball (40, 140) located on a ramp (17, 117). The ball (40, 140) is responsive to deceleration of the vehicle whereby the ball (40, 140) moves up the ramp (17, 117) and permits the second valve (34, 134) to close. Closure of the second valve (34, 134) prevents fluid communication between the fluid reservoir (13, 113) and the proportioning valve (10, 110) in order to vary the outlet pressure (POut) of the proportioning valve (10, 110) in response to deceleration of the vehicle. The proportioning valve (10, 110) may be contained completely within the housing (12, 112) of the master cylinder (10, 110). |
