EP 0826877 A3 19980506 - Hydraulically-actuated fuel injector with direct control needle valve
Title (en)
Hydraulically-actuated fuel injector with direct control needle valve
Title (de)
Elektro-hydraulisch betätigtes Kraftstoffeinspritzventil mit einer Düsennadel, die direkt angesteuert wird
Title (fr)
Injecteur de carburant à actionnement hydraulique avec une soupape à pointeau à commande directe
Publication
Application
Priority
- US 70780496 A 19960830
- US 76801496 A 19961213
- US 86460697 A 19970528
Abstract (en)
[origin: EP0826877A2] A hydraulically actuated fuel injector (14') includes an injector body (105) having an actuation fluid inlet (106) and a needle control chamber (118). A hydraulic means within the injector pressurizes fuel in the injector body (105). The hydraulic means includes an actuation fluid control valve (140) having a solenoid (130) and is moveable to open and close the actuation fluid inlet (106). A needle valve member (160) includes a closing hydraulic surface (167) exposed to pressure in the needle control chamber (118). A needle control valve (136), which utilizes the same solenoid (130), is mounted in the injector body (105) and moveable to open and close the needle control chamber (118) to a source of high pressure fluid (106). The slower response time of the actuation fluid control valve (140) allows for direct control of the fast responding needle valve (160) by a single fast acting two-way solenoid (130). <IMAGE>
IPC 1-7
IPC 8 full level
F02M 45/04 (2006.01); F02M 47/00 (2006.01); F02M 47/02 (2006.01); F02M 51/06 (2006.01); F02M 57/02 (2006.01); F02M 59/10 (2006.01); F02M 59/46 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP)
F02M 45/04 (2013.01); F02M 47/027 (2013.01); F02M 57/025 (2013.01); F02M 57/026 (2013.01); F02M 59/105 (2013.01); F02M 59/466 (2013.01); F02M 63/0017 (2013.01); F02M 63/0029 (2013.01); F02M 63/0036 (2013.01); F02M 63/0042 (2013.01); F02M 63/0045 (2013.01); F02M 63/0049 (2013.01); F02M 2200/21 (2013.01); F02M 2200/502 (2013.01)
Citation (search report)
- [XY] DE 4118237 A1 19911212 - AVL VERBRENNUNGSKRAFT MESSTECH [AT]
- [DY] US 5271371 A 19931221 - MEINTS EDWARD G [US], et al
- [A] EP 0641931 A1 19950308 - SERVOJET ELECTRONIC SYST LTD [US]
- [A] US 5522545 A 19960604 - CAMPLIN FREDERICK A [US], et al
- [A] US 3837324 A 19740924 - LINKS H
- [PA] DE 19523878 A1 19970109 - MTU FRIEDRICHSHAFEN GMBH [DE]
- [A] US 5143291 A 19920901 - GRINSTEINER JAMES J [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 008, no. 270 (M - 344) 11 December 1984 (1984-12-11)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0826877 A2 19980304; EP 0826877 A3 19980506; EP 0826877 B1 20030326; DE 69720123 D1 20030430; DE 69720123 T2 20040129; DE 69727713 D1 20040325; DE 69727713 T2 20041125; DE 69729333 D1 20040701; DE 69729333 T2 20040923; JP H10110658 A 19980428
DOCDB simple family (application)
EP 97306118 A 19970812; DE 69720123 T 19970812; DE 69727713 T 19970812; DE 69729333 T 19970812; JP 23580397 A 19970901