Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1998-03-13
2000-01-04
Schwartz, Christopher P.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031161, 303 10, B60T 834, B60T 1316, B60T 840
Patent
active
060101989
ABSTRACT:
An automotive brake control system with a skid control hydraulic unit and a pressure apply pump-and-piston device, comprises a single motor having a driving connection both an ABS return pump and a pressure apply pump, a circulation circuit being connected between a pressure introduction chamber of a pressure apply piston unit and a pressure apply suction circuit of the pressure apply pump, and a circulation mode-select valve disposed in the circulation circuit for opening and closing of the latter. The circulation mode-select valve comprises a normally-open valve. An electronic control unit is provided for closing the circulation mode-select valve only during the traction-and-yaw control in which a pressure apply action of the pressure apply piston unit is required.
REFERENCES:
patent: 5205623 (1993-04-01), Holzmann et al.
patent: 5246280 (1993-09-01), Sigl
patent: 5295740 (1994-03-01), Watanabe et al.
patent: 5322363 (1994-06-01), Sekiguchi et al.
patent: 5407257 (1995-04-01), Iwata
patent: 5938296 (1999-08-01), Nakazawa
Schwartz Christopher P.
Unisia Jecs Corporation
Woller Jeffrey
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