| 摘要 |
An antilock modulator includes a valve body (11) defining a cylinder (12) in which a plunger (18) is slidably mounted and sealed with respect thereto towards one end thereof; an inlet (13) and outlet (14) open into the cylinder (12) at axially spaced locationsand a valve assembly is mounted coaxially of the plunger between the inlet (13) and outlet (14), said valve assembly having a first valve member (75) arranged to control flow from inlet (13) to outlet (14); the valve assembly defines two flow paths between the inlet (13) and first valve member (75) and a second valve member (65) is provided to control flow through one of said paths; the plunger (18) being adapted to control movement of the first and second valve members (75) and (65) sequentially upon axial movement relative to the cylinder (12), the second valve member (65) being arranged such that a pressure differential between inlet (13) and outlet (14) will oppose a force applied by the plunger (18) to open said second valve member (65); means being provided to selectively move said plunger (18) relative to said cylinder (12). |
