EP 0980575 A1 20000223 - ELECTRONIC CONTROL CIRCUIT
Title (en)
ELECTRONIC CONTROL CIRCUIT
Title (de)
ELEKTRONISCHE STEUERSCHALTUNG
Title (fr)
CIRCUIT DE COMMANDE ELECTRONIQUE
Publication
Application
Priority
- DE 9801253 W 19980507
- DE 19719602 A 19970509
Abstract (en)
[origin: DE19719602A1] The invention relates to an electronic control unit for controlling an electromagnetic valve having an armature, in particular for a heating and/or air conditioning installation in a motor vehicle. The circuit has an electronic switch element (8) which is mounted in a row with the valve coil. Said switch element (8) is characterized in that it controls the valve voltage (29) (or valve current (44)) at the coil (12) in such a way that, when the valve is switched in, the valve voltage (29) reaches a first value (U1). The valve voltage (29) is then brought back to a second value (U2) which is less than the first value (U1). The valve voltage (29) then takes on a third value (N) which is greater than the second value (U2) and represents a withstand voltage for maintaining the armature (13) in its switch-on position.
IPC 1-7
IPC 8 full level
H01F 7/18 (2006.01)
CPC (source: EP US)
H01F 7/1805 (2013.01 - EP US); H01F 7/1844 (2013.01 - EP US)
Citation (search report)
See references of WO 9852201A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DE 19719602 A1 19981112; EP 0980575 A1 20000223; JP 2001525125 A 20011204; US 6394414 B1 20020528; WO 9852201 A1 19981119
DOCDB simple family (application)
DE 19719602 A 19970509; DE 9801253 W 19980507; EP 98924050 A 19980507; JP 54868298 A 19980507; US 42356800 A 20000228