Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1988-07-18
1989-07-11
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303119, B60T 862
Patent
active
048465348
ABSTRACT:
In an antilocking braking system, a pressure modulator is provided for the control of pressure reduction and pressure build-up phases, wherein a drive pressure space of this modulator is placed under a pressure control to move a modulator piston into an end position associated with a minimum volume of a work chamber, which forms a section of the master brake line. In this end position, a spring-loaded inlet valve, connected between the work chamber of the pressure modulator and the brake booster of the brake system, is held in its open position by a tappet. As a result of pressure release in the drive pressure space, the modulator piston is displaced in the direction of its end position associated with a maximum volume of the work chamber, so that brake fluid can flow back into the work chamber from one or more wheel brakes connected to this work chamber. In order to provide functional reliability and protect against a malfunction of the modulator together with its auxiliary pressure source and/or its inlet valve, a bypass flow path is provided which is both parallel to the flow path leading from the work chamber of the pressure modulator to the wheel brakes, and which can be released and closed by a solenoid valve.
REFERENCES:
patent: 3877759 (1975-04-01), Sekiguchi et al.
Leiber Heinz
Resch Reinhard
Daimler-Benz Aktiengesellschaft
Reger Duane A.
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