Patent ID: 6276136
Filing Date: 2001-08-21
Classification: B60T

Abstract:
A hydraulic pressure brake apparatus comprising:a pressure source;a regulator for regulating pressure in the pressure source to a regulated pressure corresponding to an operation force of a brake pedal to supply the regulated pressure to a power chamber during operation of the brake pedal, the regulator including a pressure increasing valve which alternatively establishes and interrupts fluid communication between the pressure source and the power chamber and a pressure decreasing valve which alternatively establishes and interrupts fluid communication between the power chamber and a reservoir;a booster including a power piston operated by the regulated pressure in the power chamber;a master cylinder associated with at least one wheel brake and interlocked with the booster; andvalve means for applying the pressure in the pressure source to the power chamber irrespective of operation of the brake pedal, the valve means including a first valve alternatively establishing and interrupting fluid communication between the power chamber and the pressure decreasing valve and a second valve alternatively establishing and interrupting fluid communication between the power chamber and the pressure source.