Global Patent Index - EP 0870905 B1

EP 0870905 B1 2002-09-04 - Current control process for an electromagnetically operated lift valve of an internal combustion engine

Title (en)

Current control process for an electromagnetically operated lift valve of an internal combustion engine

Title (de)

Stromsteuerverfahren für ein elektromagnetisch betätigtes Hubventil

Title (fr)

Procédé de contrôle de courant pour une soupape à actionnement électromagnétique de moteur à combustion interne

Publication

EP 0870905 B1 (DE)

Application

EP 98100651 A

Priority

DE 19714518 A

Abstract (en)

[origin: EP0870905A1] The valves of the internal combustion engine are opened by solenoid drives and are closed by return springs. To provide a quiet operation two solenoids are fitted to each valve which are operated in alternate modes to provide the reciprocating drive for the valve. The transfer of the armature from one solenoid to the other involves a controlled current pattern for the second solenoid to capture the armature and enable it to bring the valve to a stop with a minimum of noise. The capture current (If) is followed by a two-stage holding current (Ia,Ih) to ensure the armature, and hence the valve, is held in the selected position. The function of the solenoids is reversed when the valve movement is in the opposite direction.

IPC 1-7 (main, further and additional classification)

F01L 9/04

IPC 8 full level (invention and additional information)

F01L 9/04 (2006.01); F02D 41/20 (2006.01); H01F 7/18 (2006.01)

CPC (invention and additional information)

F01L 9/04 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0870905 A1 19981014; EP 0870905 B1 20020904; DE 19714518 A1 19981015; JP H10288015 A 19981027

INPADOC legal status


2010-04-30 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090202

2009-11-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090115

2009-11-27 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20091030

2009-10-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090801

2009-09-23 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20090115

2008-07-31 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20080128

- Year of fee payment: 11

2008-05-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20080228

- Year of fee payment: 11

2008-05-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20080131

- Year of fee payment: 11

2004-05-12 [27C] TERMINATION OF OPPOSITION PROCEDURE

- Effective date: 20031221

2003-07-30 [26] OPPOSITION FILED

- Opponent name: FEV MOTORENTECHNIK GMBH

- Effective date: 20030604

2003-02-14 [ET] FR: TRANSLATION FILED

2002-10-10 [REF] CORRESPONDS TO:

- Document: DE 59805369 20021010

2002-09-25 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20020904

2002-09-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

2002-09-04 [REG GB FG4D] EUROPEAN PATENT GRANTED

- Free text: NOT ENGLISH

2002-01-02 [RTI1] TITLE (CORRECTION)

- Free text: CURRENT CONTROL PROCESS FOR AN ELECTROMAGNETICALLY OPERATED LIFT VALVE OF AN INTERNAL COMBUSTION ENGINE

2001-08-08 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010621

1999-06-23 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB

1999-06-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990331

1998-10-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB

1998-10-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI