EP 1546545 B1 20070613 - PUMP/NOZZLE UNIT AND METHOD FOR SETTING THE HARDNESS OF CONTACT AREAS OF A CONTROL VALVE
Title (en)
PUMP/NOZZLE UNIT AND METHOD FOR SETTING THE HARDNESS OF CONTACT AREAS OF A CONTROL VALVE
Title (de)
PUMPE-DÜSE-EINHEIT UND VERFAHREN ZUR EINSTELLUNG DER HÄRTE VON ANLAGEBEREICHEN EINES STEUERVENTILS
Title (fr)
UNITE POMPE-BUSE ET PROCEDE POUR REGULER LA DURETE DE ZONES D'APPUI D'UNE SOUPAPE DE COMMANDE
Publication
Application
Priority
- DE 0303027 W 20030912
- DE 10242376 A 20020912
Abstract (en)
[origin: WO2004027252A1] The invention relates to a pump/nozzle unit for delivering fuel (10) into a combustion chamber (12) of an internal combustion engine, comprising a fuel pump (14-22), which can be controlled and/or regulated and which has a control valve (22) with a valve needle (48) that is displaced by a piezo actuator (76). The comparatively short travel of the piezo actuator (76) is increased by a mechanical multiplication device (56, 58) to the extent necessary for displacing the valve needle (48). In order to avoid jeopardizing the pressure resistance of the control valve housing while yet providing the comparatively wear-resistant contact areas (80, 82) coming into contact with the mechanical multiplication device (56, 58), the invention provides that the control valve housing is made of a material having a comparatively lower basic hardness, for example, Ovako 677, and the contact areas (80, 82) of the control valve (22) are subsequently hardened by laser.
IPC 8 full level
F02M 59/46 (2006.01); F02M 51/00 (2006.01); F02M 57/02 (2006.01); F02M 59/44 (2006.01); F02M 61/16 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP)
F02M 57/02 (2013.01); F02M 59/468 (2013.01); F02M 61/168 (2013.01); F02M 2200/701 (2013.01); F02M 2200/9061 (2013.01)
Citation (examination)
- DE 10104617 A1 20020808 - BOSCH GMBH ROBERT [DE]
- DE 4426006 A1 19960125 - BOSCH GMBH ROBERT [DE]
- DE 10008542 A1 20010906 - BOSCH GMBH ROBERT [DE]
- DE 19726991 A1 19990107 - BOSCH GMBH ROBERT [DE]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 2004027252 A1 20040401; DE 10242376 A1 20040325; DE 50307485 D1 20070726; EP 1546545 A1 20050629; EP 1546545 B1 20070613; EP 1546545 B8 20070801; JP 2005538306 A 20051215
DOCDB simple family (application)
DE 0303027 W 20030912; DE 10242376 A 20020912; DE 50307485 T 20030912; EP 03750345 A 20030912; JP 2004536857 A 20030912