| 摘要 |
<p>PCT No. PCT/EP92/00035 Sec. 371 Date Oct. 28, 1993 Sec. 102(e) Date Oct. 28, 1993 PCT Filed Jan. 10, 1992 PCT Pub. No. WO92/15812 PCT Pub. Date Sep. 17, 1992.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 T1 and T2. The frequency of the amplitude modulation having a period T is equal to a sum of the excitation time intervals T1 and T2 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 T1/T2 of the time intervals for which current alternately flows through the exciter coils.</p> |
