| 摘要 |
<p>An air-actuated brake actuator (10) for a vehicle comprising a housing having first and second end walls (21, 22) defining a housing interior whereby the first end wall (21) has an aperture therethrough. A movable member (32) is disposed within the housing and divides the interior thereof into a first chamber (27) and a second chamber (31). An actuator rod (18) is operably connected to the movable member (32) for reciprocating movement relative to the housing, and has an end (20) extending through the aperture (34) for operative connection to a brake. The first chamber (27) has a first port and the second chamber (31) has a second port, and a control valve (102) is in fluid communication between the first and second ports and a pneumatic source (114) of pressurized air to control the flow of air between the pneumatic source (114), the first and second chambers (27 and 30) and the atmosphere as the brake actuator (10) is actuated. The housing interior of the brake actuator (10) is thereby effectively sealed against the introduction of contaminating fluids from the atmosphere.</p> |
