| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vehicular disc brake device capable of accelerating the smaller and lighter form of the whole device while preventing the larger size of a pad return spring mounted on a disc brake unit. SOLUTION: A pressure reservoir 29 for opening a pressure supplied to the disc brake unit 25, which has a second piston for defining a fluid reserving chamber 29a behind a pump piston 27b of an electric pump 27, a fluid return spring 29c for energizing the second piston 29b to the pump piston 27b to apply pressure to a fluid in the fluid reserving chamber 29a, and a fluid resupply passage 29d provided through the pump piston 27b for passing the fluid in the fluid reserving chamber 29a to a pump chamber 27c in the suction process of the pump piston 27b, is built in the electric pump 27.</p> |
