Global Patent Index - EP 0980575 A1

EP 0980575 A1 2000-02-23 - ELECTRONIC CONTROL CIRCUIT

Title (en)

ELECTRONIC CONTROL CIRCUIT

Title (de)

ELEKTRONISCHE STEUERSCHALTUNG

Title (fr)

CIRCUIT DE COMMANDE ELECTRONIQUE

Publication

EP 0980575 A1 (DE)

Application

EP 98924050 A

Priority

  • DE 9801253 W
  • DE 19719602 A

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 (main, further and additional classification)

H01F 7/18

IPC 8 full level (invention and additional information)

H01F 7/18 (2006.01)

CPC (invention and additional information)

H01F 7/1844 (2013.01); H01F 7/1805 (2013.01)

Citation (search report)

See references of WO 9852201A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

DE 19719602 A1 19981112; EP 0980575 A1 20000223; JP 2001525125 A 20011204; US 6394414 B1 20020528; WO 9852201 A1 19981119

INPADOC legal status


2002-04-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010203

2000-05-03 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000317

2000-02-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991209

2000-02-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT