BRAKE CONTROL DEVICE FOR A VEHICLE

摘要

A brake control device for a vehicle has a master cylinder that converts an operating force of a brake pedal to a fluid pressure, a wheel cylinder installed in each wheel of the vehicle that generates a braking force by a fluid pressure introduced in each wheel, an introduction section that introduces the fluid pressure generated by the master cylinder, a first switching valve disposed in a fluid passage connecting the master cylinder and the wheel cylinder, and closes at system startup and opens at system non-startup/failure, a second switching valve disposed in a branch fluid passage connecting the master cylinder and the introduction section and opens at the system startup and closes at the system non-startup/failure, and a brake controller. When the system is started after the depression operation of the brake pedal, the brake controller closes the second switching valve.

主权项

1. A brake control device for a vehicle having a semi-brake-by-wire system, comprising:
a master cylinder that converts an operating force of a brake pedal to a fluid pressure; a wheel cylinder installed in each wheel of the vehicle that generates a braking force by a fluid pressure introduced in each wheel; an introduction section that introduces the fluid pressure generated by the master cylinder; a first switching valve disposed in a fluid passage connecting the master cylinder and the wheel cylinder, that closes at system startup and opens at system non-startup/failure; a second switching valve disposed in a branch fluid passage connecting the master cylinder and the introduction section and opens at the system startup and closes at the system non-startup/failure; and a brake controller, wherein, when the system is started after the depression operation of the brake pedal, the brake controller closes the second switching valve, and wherein, when the fluid pressure generated by the master cylinder increases, the brake controller causes the second switching valve to open in accordance with fluid pressure increase amount to allow for the brake fluid to flow into the introduction section.