Brake fluid pressure control system and method of controlling th

Details Brake fluid pressure control system and method of controlling th Brake fluid pressure control system and method of controlling th

1997-10-08

1999-12-07

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

With failure responsive means

3031161, 303 10, B60T 888, B60T 840

Patent

active

059971061

ABSTRACT:
A brake fluid pressure control system includes an external source of fluid pressure, a wheel cylinder, and a fluid pressure control valve disposed between the external source of fluid pressure and the wheel cylinder. A controller is operable to control the fluid pressure control valve whereby fluid pressure under control is fed from the external source of fluid pressure to the wheel cylinder. When a change in pressure within the wheel cylinder occurs, a fail safe valve is operable to disconnect the wheel cylinder from the fluid pressure control valve and instead, connect the wheel cylinder to a master cylinder. Inspection of the fail safe valve is carried out by disconnecting the wheel cylinder from the control valve when no brake is applied, feeding fluid pressure from the external source of fluid pressure to the wheel cylinder, and detecting a change in pressure within the wheel cylinder. An alert device is provided to give a warning in the event of a system failure.

REFERENCES:
patent: 4708406 (1987-11-01), Takagi et al.
patent: 4824182 (1989-04-01), Steffes et al.
patent: 4832418 (1989-05-01), Mattusch
patent: 5302008 (1994-04-01), Miyake et al.
patent: 5613740 (1997-03-01), Kawamoto et al.
patent: 5810456 (1998-09-01), Inagaki et al.

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