| 摘要 |
<p>A separating valve mechanism (90) includes: a housing (91); and a stepped piston (92), serving as a separating piston, which is fitted to the housing (91) so as to be fluid tight and capable of sliding. A large diameter-side chamber (93) is provided to a large diameter-side of the stepped piston (92). A small diameter-side chamber (94) is provided to a small diameter-side of the stepped piston (92). A partitioning seal member (95) is provided to the small diameter-side of the stepped piston (92) in order to ensure the fluid tightness of the small diameter-side chamber (94). A partitioning seal member (96) is provided to the large diameter-side of the stepped piston (92) in order to ensure the fluid tightness of the large diameter-side chamber (93). A reservoir chamber (97) which is adjacent to the small diameter-side chamber (94) and the large diameter-side chamber (93), which is partitioned by the seal members (95, 96), and into which master cylinder pressure is not inputted, is also formed therein.</p> |
