| 摘要 |
PROBLEM TO BE SOLVED: To provide a brake control system equipped with a negative pressure type booster capable of accurately adjusting output in a simple control mode.SOLUTION: The open valve amount of first and second open/close valves 109A and 109B which can selectively introduce atmospheric pressure and negative pressure into a variable pressure chamber R2, is controlled on the basis of the relative displacement amount of a power piston 30 coupled to a movable partition wall 20 dividing a negative pressure chamber R1 and the variable pressure chamber R2 in a negative pressure type booster 103, and an input member 40 installed in the power piston 30 so as to move forward/backward to/from the piston 30 and receiving operational force from the outside.SELECTED DRAWING: Figure 1 |
