| 摘要 |
PURPOSE:To compose a device at a low cost without high working accuracy by providing a control part sensing the stroke or load of an input piston to control first and second control valves. CONSTITUTION:The pressure in a second liquid-pressure chamber 60 is controlled higher always than that in a first liquid-pressure chamber 50. Consequently a partitioning wall piston 7 is made into a stationary condition where the piston 7 is made to abut on the right end part of a large-diameter cylinder 3. When a liquid-pressure source 11 is directly pushed leftward by an input piston 4. A power piston 5 is moved leftward together with the partitioning wall piston 7 against a spring 53, and a master cylinder 6 is pushed by the power piston 5 to operate a brake. |
