| 摘要 |
PURPOSE: A double power transformation air master is provided to improve the stability of a vehicle by preventing the rear wheel lock phenomenon due to the excessive braking power, to reduce the braking distance, and to enhance durability by avoiding the breakage of the parts of a brake. CONSTITUTION: A compressive spring(40) is doubly installed in a push rod(30) for pressurizing an oil piston(50). If a plate(20) is pressurized by the high-pressure air supplied into a body(10) of an air master(1), a second compressive spring(42) having lower spring constant is compressed by a middle plate(21). If the second compressive spring is fully compressed, a first compressive spring(41) of higher spring constant is compressed. According to the reaction force in proportion to the high spring constant of the first compressive spring, the hydraulic pressure generated by the second compressive spring is reduced.
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