EP 1377745 B1 20041103 - METHOD FOR OPERATING A PUMP-NOZZLE UNIT AND A CORRESPONDING PUMP-NOZZLE UNIT
Title (en)
METHOD FOR OPERATING A PUMP-NOZZLE UNIT AND A CORRESPONDING PUMP-NOZZLE UNIT
Title (de)
VERFAHREN ZUM BETREIBEN EINER PUMPE-DÜSE-EINHEIT SOWIE PUMPE-DÜSE-EINHEIT
Title (fr)
PROCEDE POUR ACTIONNER UNE UNITE POMPE-AJUTAGE ET UNITE POMPE-AJUTAGE CORRESPONDANTE
Publication
Application
Priority
- DE 0201235 W 20020404
- DE 10116635 A 20010404
Abstract (en)
[origin: WO02081900A1] The invention relates to a pump-nozzle unit (10) for injecting fuel into the combustion chamber of an internal combustion engine. To this end, an increase in a system pressure causes a valve element (28) to open counter to a pretensioning force. As the system pressure increases so does the pretensioning force, whereby a valve closing pressure that is higher due to the increased pretensioning force is always lower than the system pressure. The system pressure is then decreased to a value lower than the valve closing pressure whereby causing the valve element to close. Afterwards, the system pressure is increased once again so that the valve element opens during a post-injection in the occurrence of a valve opening pressure that is higher due the increased pretensioning force. Finally, the system pressure is decreased once again as well as the pretensioning force whereby causing the valve element (28) to close.
IPC 1-7
IPC 8 full level
F02M 45/06 (2006.01); F02M 45/08 (2006.01); F02M 57/02 (2006.01); F02M 59/36 (2006.01); F02M 61/20 (2006.01)
CPC (source: EP US)
F02M 45/06 (2013.01 - EP US); F02M 45/08 (2013.01 - EP US); F02M 57/022 (2013.01 - EP US); F02M 59/366 (2013.01 - EP US); F02M 61/205 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT SE
DOCDB simple family (publication)
WO 02081900 A1 20021017; DE 10116635 A1 20021017; DE 50201468 D1 20041209; EP 1377745 A1 20040107; EP 1377745 B1 20041103; US 2004020458 A1 20040205
DOCDB simple family (application)
DE 0201235 W 20020404; DE 10116635 A 20010404; DE 50201468 T 20020404; EP 02727288 A 20020404; US 29721803 A 20030423