The invention relates to an apparatus (1) and a method for driving a solenoid valve (3), having an evaluation and control unit (10), a PWM apparatus (20) and a current measuring apparatus (AM), wherein, in normal operation, the evaluation and control unit (10) generates a PWM signal (PWM) having a duty ratio (TV) and emits said PWM signal to a magnet assembly (3.1) of the solenoid valve (3) by means of the PWM apparatus (20), wherein the current measuring apparatus (AM) detects a current (I) through the magnet assembly (3.1) resulting from the PWM signal (PWM) and reports said current back to the evaluation and control circuit (10), wherein a current (I) that is above a response threshold of the magnet assembly (3.1) triggers a switching process of the solenoid valve (3), and wherein, in test operation, the evaluation and control circuit (10) generates and emits at least one test PWM signal (TPWM1, TPWM2) having a duty ratio (TV1, TV2) by means of the PWM apparatus (20), said at least one test PWM signal inducing a test current (IT1, IT2) that is below the response threshold through the magnet assembly (3.1), and to a hydraulic assembly having such an apparatus (1) for driving a solenoid valve (3). In this case, in test operation, the evaluation and control unit (10) generates and emits at least two different test PWM signals (TPWM1, TPWM2) and detects the resulting test currents (IT1, IT2), wherein the evaluation and control unit (10) derives presently prevailing ambient conditions from the predefined test PWM signals (TPWM1, TPWM2) and the resulting test currents (IT1, IT2) and, in normal operation, generates and emits a subsequent PWM signal (PWM) based on the presently prevailing ambient conditions, said subsequent PWM signal inducing a current (I) that is above the response threshold, for the purpose of switching the solenoid valve (3).


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    Title :

    Apparatus and Method for Driving a Solenoid Valve


    Contributors:

    Publication date :

    2018-06-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16K VALVES , Ventile / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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