| 摘要 |
PROBLEM TO BE SOLVED: To make brake pedal operating feelings at the time of emergency brake action excellent in the same way as the time of normal brake action. SOLUTION: A second atmosphere inflow control annular valve seat 37 that can advance/retreat in relation to a valve body 22 and an input member 27 is added to valve mechanism 36 having an atmosphere inflow control annular valve seat 38, an atmosphere outflow control annular valve seat 39 and a valve member 45. A reaction member 54 imparting reaction, corresponding to output, to the input member 27 when input of the specified value or more is applied to the input member 27 is installed in the valve body 22. At the time of normal brake action, an actuator 48 installed in the valve body 22 is not actuated, and the second atmosphere inflow control annular valve seat 37 is positioned on the front side of the atmosphere inflow control annular valve seat 38 by a spring. At the time of emergency brake action, the actuator 48 is actuated to shift the atmosphere inflow control annular valve seat 37 to the rear side of the atmosphere inflow control annular valve seat 38. |
