| 摘要 |
<p>Thermal expansion of hydraulic fluid is accommodated in a master cylinder assembly for a braking system having two master cylinders operable by separate pedals either together for braking or separately for steering each master cylinder having a compensation chamber (21) connected through a port (22) with the other master cylinder, and a valve (24) controlling communication of the compensation chamber (21) with the pressure chamber (17) through a port (23) in a movable wall member (18) separating the chambers. In a normal unactuated condition the wall member (18) is held against an end plug (3) by the piston return spring (16) and the valve (24) is held closed by the piston engaging the valve stem (25). Thermal expansion of fluid contained in the closed space defined by the compensation chambers (21) and means connecting them is permitted by movement of the wall members (18) to increase the volume of the closed space. <IMAGE></p> |
