Brake System for vehicle

Details Brake System for vehicle Brake System for vehicle

1994-09-16

1997-03-25

Young, Lee W.

Fluid-pressure and analogous brake systems

With pump

Pressure control

303155, 3031134, B60T 1316

Patent

active

056137400

ABSTRACT:
A brake system for a vehicle includes a master cylinder for outputting a liquid pressure corresponding to a braking operation quantity, an electric actuator capable of outputting the liquid pressure corresponding to the braking operation quantity, and a switch-over valve capable of switching the connection and disconnection between the master cylinder and wheel brake. The electric actuator is connected to the wheel brake to block the back flow of a working liquid from the wheel brake. Braking pressure applied to the wheel brake is detected by pressure detector. When a difference between the detected braking pressure and a target braking pressure corresponding to the braking operation quantity exceeds a predetermined range, an output liquid pressure from the master cylinder is applied to the wheel brake. Thus, even if a trouble is produced in the electric actuator, itself, or a drive circuit for driving the electric actuators, the braking pressure for the wheel brake is prevented from being reduced undesirably.

REFERENCES:
patent: 4435021 (1984-03-01), Hoenick
patent: 4462642 (1984-07-01), Leiber
patent: 4919493 (1990-04-01), Leiber
patent: 5106167 (1992-04-01), Matsuda
patent: 5150951 (1992-09-01), Leiber et al.
patent: 5152585 (1992-10-01), Patient et al.
patent: 5169215 (1992-12-01), Takata
patent: 5222787 (1993-06-01), Eddy et al.
patent: 5302008 (1994-04-01), Miyake et al.

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