Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1991-02-05
1992-06-30
Peters, Jr., Joseph F.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303113TR, B60T 834
Patent
active
051257246
ABSTRACT:
A hydraulic brake system for a motor vehicle with rear axle drive and front axle/rear axle brake circuit division is equipped with an antilocking brake system, a traction control device and an electronic braking force distribution control device. In order to effect these regulation and control functions on the rear axle of the vehicle, a pressure modulator is provided which has a modulation chamber connected via brake pressure control valves to the rear wheel brakes. This modulation chamber is separated by a modulator piston from a control pressure space to which the outlet pressure of an auxiliary pressure source can be connected under valve control. The modulator piston is displaced by a return spring into the position corresponding to the maximum volume of the modulation chamber, which is the initial position both for normal braking and for traction control operation. The pressure modulator is dimensioned such that the maximum brake pressure can be built up and also brought down again completely with one single stroke of the piston. The output signal of a position signal generator monitoring the piston position is used as a measure of the brake pressure in the rear axle brake circuit. The output signal of a position signal generator monitoring the pedal position acts as a measure of the brake pressure in the front axle brake circuit.
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Ellis Christopher P.
Mercedes-Benz AG
Peters Jr. Joseph F.
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