Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1984-10-31
1987-01-13
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303116, B60T 840
Patent
active
046360115
ABSTRACT:
The present invention relates to a braking force modulator for an anti-lock system for pneumatic brakes for vehicles in which a hydraulic circuit accomplishes the anti-lock function. A sensor sensing the state of rotation of a wheel emit signals for controlling a modulator valve (34) which, in response to such signals modulates the pressure in one or more counter-pressure cylinders (27). A closing valve is inserted into the pressurized-air conduit (4) between the control valve (5) for the brake operated by the driver and one or more braking cylinders (8) and this closing valve closes the pressurized-air supply to the braking cylinder or cylinders (8) subsequent to a sensor signal ordering release of the brakes. A release valve is inserted into the pressurized-air conduit (4) between the closing valve and the braking cylinder or cylinders (8) for discharging pressurized air therefrom if the ability of the pressure producer (13, 26) for the hydraulic fluid pressure and of the counter-pressure cylinder (27) to continue the release of the brake is exceeded.
REFERENCES:
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Blomberg Folke I.
Holst Jan-Olov M.
Butler Douglas C.
McConnell Daniel E.
Oberley Alvin
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