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1. (WO2017153030) BISTABLE SOLENOID VALVE DEVICE AND METHOD FOR DETERMINING AN ARMATURE POSITION OF A BISTABLE SOLENOID VALVE

Pub. No.:    WO/2017/153030    International Application No.:    PCT/EP2017/000135
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Feb 03 00:59:59 CET 2017
IPC: H01F 7/16
H01F 7/18
Applicants: WABCO EUROPE BVBA
Inventors: GOERS, Andreas
STRUWE, Otmar
TEICHMANN, Andreas
Title: BISTABLE SOLENOID VALVE DEVICE AND METHOD FOR DETERMINING AN ARMATURE POSITION OF A BISTABLE SOLENOID VALVE
Abstract:
The invention relates to a bistable solenoid valve device (1) for a fluid system (30), wherein the solenoid valve device (1) has a bistable solenoid valve (7) having: a permanent magnet device (2) having a first core (2a) and a second core (2b), an armature (3), which can be moved between a first armature position (I) for contact against the first core (2a) while an air gap (11) is formed with respect to the second core (2b) and a second armature position (II) for contact against the second core (2b) while an air gap (11) is formed with respect to the first core (2a), wherein the armature (3) has an armature core (4) of magnetically conductive material, a first armature coil (6a) for being supplied current for movement into the first armature position (I), and a second armature coil (6b) for being supplied current for movement into the second armature position (II), a final stage (9a, 9b, 10) for supplying current to one of the armature coils (6a, 6b) for movement of the armature (3). A detection device (12) is provided for evaluating or measuring a first inductance (La, Lb) of the first armature coil (6a) and for evaluating or measuring a second inductance (La, Lb) of the second armature coil (6b) without movement of the armature (3) and for comparing the inductances (La, Lb) of the first armature coil (6a) and of the second armature coil (6b) and for outputting a state signal (S1) indicating the armature position (I, II).