Fluid-pressure and analogous brake systems – Speed-controlled – With failure responsive means
Patent
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.
Oberleitner Robert J.
Siconolfi Robert A.
Tokico Ltd.
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