Process for actuating a slide valve designed as a magnetic valve, magnetic valve for carrying out said process
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United States of America Patent
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Apr 2, 1996
Grant Date -
N/A
app pub date -
Oct 28, 1993
filing date -
Mar 8, 1991
priority date (Note) -
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Abstract
A magnetic valve having spring-centered basic position, with a pulsed current of a relatively high frequency flowing through each of two exciter coils for setting alternate excited functional positions and for setting defined flow-cross sections in the respective functional positions. The pulsed direct currents undergo square-amplitude modulation so that current flows through the exciter coils alternately for time intervals T.sub.1 and T.sub.2. The frequency of the amplitude modulation having a period T is equal to a sum of the excitation time intervals T.sub.1 and T.sub.2 of the two exciter coils and is approximately 400 Hz. The magnetic valve has a central position rigidly mounted in a housing of the valve and a moveable valve element in a form of a soft iron sleeve which is also an armature of a double-stroke magnetic system. The functional position and deflection of the armature are chosen as a function of the ratio T.sub.1 /T.sub.2 of the time intervals for which current alternately flows through the exciter coils.
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