| 摘要 |
Fluid received from the reservoir (32) by the second chamber (52) of a tandem master cylinder (12) is controlled by a center port compensation valve (148). The center port compensation valve (148) has a head (126') connected to a linkage member (98') that joins a first retainer (94') with a second retainer (96') to cage a resilient member (48). An actuation arrangement has a first input member (14) that responds to an operator input to initially move the first piston (42) and the second (44) piston to compress the resilient means (48) and allow head (126') to engage a seat (40) to terminate communication between reservoir (32) and the second chamber (52). Thereafter movement of the second piston (44) pressurizes fluid in the second (52) chamber to effect a first brake application. The actuation arrangement is characterized by a second input member (200) that responds to an electronic signal to develop a force that acts on a plunger to compress the resilient member (48) and move the head (126') into engagement with seat (40') to terminate communication from the reservoir (32) to the second chamber (52) and thereafter moves to pressurize fluid in the second chamber (52) and effect a second brake application.
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