Patent ID: 6557950
Filing Date: 2003-05-06
Classification: B60T

Abstract:
A hydraulic brake apparatus for a vehicle comprising:a brake operating member; a master cylinder including a master piston which is moved in a forward direction in response to a depressing operation of the brake operating member for pressurizing brake fluid in a reservoir and outputting a master cylinder hydraulic pressure to wheel brake cylinders mounted on respective vehicle wheels in response to the movement of the master piston in the forward direction; an auxiliary hydraulic-pressure source for pressurizing the brake fluid in the reservoir to a first predetermined pressure level and outputting a power hydraulic pressure; regulating means connected to the auxiliary hydraulic pressure source and the reservoir for regulating the power hydraulic pressure outputted from the auxiliary hydraulic pressure source to a second predetermined pressure level to drive the master piston by the power hydraulic pressure regulated by the regulating means; valve means for controlling the power hydraulic pressure supplied from the auxiliary hydraulic pressure source to the regulating means; control means for performing an auto-braking control by controlling operation of the valve means regardless of the depressing operation of the brake operating member to adjust the master cylinder hydraulic pressure supplied to the wheel brake cylinder; braking operation detecting means for detecting an amount of the depressing operation of the brake operating member; the control means adjusting the master cylinder hydraulic pressure outputted from the master cylinder by adding the master cylinder hydraulic pressure produced in response to the operation of the brake operating member to a master cylinder hydraulic pressure at the auto-braking control when the brake operating member is operated while the auto-braking control is being performed by the control means.