Anti-skid brake control system for automotive vehicles
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United States of America Patent
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Oct 25, 1994
Grant Date -
N/A
app pub date -
Feb 25, 1993
filing date -
Feb 28, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brake-fluid reflux type anti-skid brake control system for automotive vehicles, comprises a main brake-fluid supply circuit, a brake-fluid reflux circuit refluxing the brake fluid from the wheel cylinder to the main brake-fluid supply circuit during operation of the anti-skid brake control system, and a brake-fluid flow control valve arranged in the supply circuit. The flow control valve employs a throttling device responsive to the pressure difference between the master-cylinder side and the fluid pressure of the wheel-cylinder side, such that when the pressure difference is less than a predetermined threshold the throttling device operates at a fully open mode, and when the pressure difference is greater than or equal to the threshold the throttling device operates at a fully throttling mode. The throttling device is further responsive to a steep positive pressure gradient in the fluid pressure of the master-cylinder side, such that the throttling device operates in the fully open mode even when the pressure difference is greater than or equal to the threshold during quick braking.
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