EP 2875232 A1 20150527 - PIEZO INJECTOR WITH HYDRAULICALLY COUPLED NOZZLE NEEDLE MOVEMENT
Title (en)
PIEZO INJECTOR WITH HYDRAULICALLY COUPLED NOZZLE NEEDLE MOVEMENT
Title (de)
PIEZOINJEKTOR MIT HYDRAULISCH GEKOPPELTER DÜSENNADELBEWEGUNG
Title (fr)
INJECTEUR PIÉZO-ÉLECTRIQUE DONT LE MOUVEMENT DE L'AIGUILLE D'INJECTION EST COUPLÉ HYDRAULIQUEMENT
Publication
Application
Priority
- DE 102012212614 A 20120718
- EP 2013064111 W 20130704
Abstract (en)
[origin: WO2014012795A1] The invention relates to a piezo injector (100) with an actuator chamber (131) in which a piezo actuator (130) is arranged. The piezo injector (100) further comprises a valve plunger bore (151) in which a valve plunger (150) is arranged, said valve plunger (150) having a first end face (152) facing the piezo actuator (130). A valve plunger bore (151) portion which is delimited by the first end face (152) forms a first control chamber (153), and a valve plunger bore (151) portion opposite the first control chamber (153) forms a spring chamber (154). The valve plunger (150) is arranged between the first control chamber (153) and the spring chamber (154). Additionally, a nozzle needle (170) is provided comprising a second end face (172), said nozzle needle (170) guiding a nozzle needle sleeve (171). The nozzle needle sleeve (171) and the second end face (172) delimit a second control chamber (173). A connection bore (160) is provided between the first control chamber (153) and the second control chamber (173). Furthermore, a leakage pin (140) is provided which is arranged between the piezo actuator (130) and the first end face (152) of the valve plunger (150) in a leakage pin bore (141). Said leakage pin bore (141) is formed in an intermediate plate (112) which adjoins a control plate (114) on the side facing the piezo actuator (130), the valve plunger bore (151) being formed in said control plate (114).
IPC 8 full level
F02M 63/00 (2006.01); F02M 61/16 (2006.01)
CPC (source: EP US)
F02M 51/0603 (2013.01 - US); F02M 61/167 (2013.01 - EP US); F02M 63/0026 (2013.01 - EP US); F02M 2200/28 (2013.01 - EP US); F02M 2200/703 (2013.01 - EP US); F02M 2200/704 (2013.01 - EP US); F02M 2547/001 (2013.01 - EP US)
Citation (search report)
See references of WO 2014012795A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2014012795 A1 20140123; DE 102012212614 A1 20140123; EP 2875232 A1 20150527; US 10024285 B2 20180717; US 2015184627 A1 20150702
DOCDB simple family (application)
EP 2013064111 W 20130704; DE 102012212614 A 20120718; EP 13736850 A 20130704; US 201314415332 A 20130704