Hydraulic brake system with brake slip control and traction slip control
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United States of America Patent
Stats
-
Jul 27, 1999
Grant Date -
N/A
app pub date -
Jan 7, 1997
filing date -
Mar 23, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
To minimize the power losses of the pump motor in a hydraulic brake system with brake slip control and traction slip control, a shut-off valve prevents flow in the suction line when the supply pressure of the pump is sufficient for traction slip control. This prevents the aspiration of further pressure fluid volume from the pressure fluid reservoir. The pump does not return any fluid volume into the pressure fluid reservoir by way of a pressure-relief valve so that the motor of the pump is relieved. Preferably, the shut-off valve is designed so that the master cylinder pressure acts in the opening direction and the supply pressure of the pump acts in the closing direction of the shut-off valve, the valve being biassed in the opening direction by a compression spring.
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