Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric
Patent
1996-02-20
1997-11-25
Young, Lee W.
Fluid-pressure and analogous brake systems
Multiple systems
Fluid pressure and electric
303 10, 303 15, 3031132, B60T 1374
Patent
active
056903960
ABSTRACT:
A proportional fluid pressure regulation system is provided using a combination of a proportional valve and a shuttle valve for fluid flow control. A system of fluid pressure regulation is achieved where the desired pressure output is provided by one of two pressure input sources. The two pressure input sources are alternately selected by operation of a pilot operated shuttle valve and a solenoid operated proportional valve. The two pressure sources may comprise a manually actuated vehicle braking system's master cylinder and a power operated fluid pump.
REFERENCES:
patent: 4755008 (1988-07-01), Imoto et al.
patent: 4768843 (1988-09-01), Baughman et al.
patent: 5156448 (1992-10-01), Kirstein
patent: 5342119 (1994-08-01), Smith et al.
Johnston Gary Lee
Kruckemeyer William Charles
Longhouse Richard Edward
Oliver Michael Leslie
Zehnder II James William
General Motors Corporation
Sedlar Jeffrey A.
Young Lee W.
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