Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1993-02-25
1994-10-25
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031171, 303900, 303901, 3031191, B60T 832
Patent
active
053583205
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.
REFERENCES:
patent: 4765692 (1988-08-01), Miyake
patent: 4936637 (1990-06-01), Adachi et al.
patent: 4957330 (1990-09-01), Morikawa et al.
patent: 5143428 (1992-09-01), Toda et al.
Atsugi Unisia Corporation
Butler Douglas C.
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