Zf Active Safety Gmbh

Zf Active Safety US Inc.

Christoph Probst

Wendy P Zhang

Tobias Oppermann

Christian Chemnitz

In a procedure for monitoring a wheel brake of a vehicle, in a procedural cycle a predefined brake pressure is set at the wheel brake, and a current value of a brake characteristic is determined. The current value is compared with a stored idealised value. The current value of the brake characteristic is stored and evaluated, and the comparison of the current value with the stored idealised value and/or a difference between the current and the idealised value may also be evaluated.

Procedure for monitoring a wheel brake of a vehicle

A method of calibrating a solenoid actuated valve includes: providing a brake system including a fluid pressure source: providing a valve having a solenoid, and wherein the valve is in fluid communication with the fluid pressure source; operating the fluid pressure source to provide a constant flow of fluid to the valve; energizing the solenoid of the valve with a constant current such that fluid flows through the valve; measuring the pressure of the fluid flowing at the valve; adjusting the current sent to the solenoid until a predetermined pressure has been obtained; storing a nominal current value of the current required to obtain the predetermined pressure; and calibrating the valve by adding a correction offset factor to the nominal current value for future actuation of the solenoid of the valve.

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Bendorf, Germany

Christoph Probst