Global Patent Index - EP 1044326 A1

EP 1044326 A1 2000-10-18 - DEVICE AND CONSTANT CONTROL OF PIEZOELECTRIC ACTUATORS FOR FUEL INJECTION SYSTEMS

Title (en)

DEVICE AND CONSTANT CONTROL OF PIEZOELECTRIC ACTUATORS FOR FUEL INJECTION SYSTEMS

Title (de)

VORRICHTUNG ZUR KONSTANTSTEUERUNG PIEZOELEKTRISCHER AKTUATOREN FÜR KRAFTSTOFFEINSPRITZSYSTEME

Title (fr)

DISPOSITIF DE COMMANDE CONSTANTE D'ACTIONNEURS PIEZO-ELECTRIQUES POUR SYSTEMES D'INJECTION DE CARBURANT

Publication

EP 1044326 A1 (DE)

Application

EP 99957887 A

Priority

  • DE 9903275 W
  • DE 19848950 A

Abstract (en)

[origin: DE19848950A1] The manipulated variable controlling change in length of the piezo stack is the electric charge (AQ) applied to the stack and generated by a charge generator (3). The generator is controlled by a control unit (2). The application and operating conditions of the IC engine, e.g. load and temperature and aging of the stack, are monitored by sensors (4). Their outputs are fed to the control unit to effect parameterization of the charge control system to adjust for these conditions

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

F02M 51/06

IPC 8 full level (invention and additional information)

F02M 51/00 (2006.01); F02D 41/20 (2006.01); F02M 51/06 (2006.01); H01L 41/04 (2006.01); H01L 41/083 (2006.01)

CPC (invention and additional information)

F02D 41/2096 (2013.01); H02N 2/06 (2013.01)

Citation (search report)

See references of WO 0025020A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19848950 A1 20000427; DE 19848950 C2 20030306; EP 1044326 A1 20001018; JP 2002528674 A 20020903; US 6328019 B1 20011211; WO 0025020 A1 20000504

INPADOC legal status


2002-01-30 [18W] WITHDRAWN

- Date of withdrawal: 20011124

2000-10-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000719

2000-10-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE