Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric
Patent
1997-11-26
2000-10-03
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Multiple systems
Fluid pressure and electric
303 20, 303 15, 25112908, 251122, B60T 1374
Patent
active
061262447
ABSTRACT:
In the case of a pressure control device for electropneumatic brake systems of vehicles, particularly utility vehicles, an electromagnetically operable intake valve is provided between a compressed air supply and a consuming device of the brake system. The pressure of the consuming device in the form of a brake cylinder is measured by a pressure sensor and transmitted for the controlled actuating of the intake valve to an electronic control unit. The intake valve is constructed as a valve piston which acts with respect to a valve seat and which, on its approach flow end situated upstream of the valve seat, acts such by means of an intake cross-section which can be changed as a function of the piston stroke, with respect to the housing receiving the valve piston. Thus, according to the values determined by the pressure sensor, a controlled feeding of compressed air is permitted corresponding to the selected contouring. The exhaust valve of the pressure control device, which exists between the consuming device and the outside air, can be contoured in a similar manner so that the piston stroke can have a cross-section-variable effect with respect to the housing.
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Knorr-Bremse System fur Nutzfahzeuge GmbH
Oberleitner Robert J.
Siconolfi Robert A.
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