| 摘要 |
<p>A brake modulator has a valve assembly (11) which defines a cylinder bore (15); a stepped plunger (25, 40) is slidingly sealed in the cylinder bore (15) and divides it into two working chambers (30, 43); each working chamber (30, 43) has an inlet (17, 50) and an outlet (22, 51) with a valve seat (18, 45) located therebetween and valve members (20, 47) positioned between each inlet (17, 50) and valve seat (18, 45); each of the valve members (20, 47) is resiliently loaded towards its associated valve seat (18, 45) and abutment means (35, 63) associated with the plunger (25, 40) is adapted to control movement of each valve member (20, 47) in response to axial movement of the plunger (25, 40); means (70) being provided to selectively move said plunger (25, 40) axially with respect to the cylinder bore (15). This brake modulator may be used in a vehicle antilock braking system to control separately the application or reduction of brake fluid to different brake actuators.</p> |
