EP 2711537 B1 20170816 - Fuel injector
Title (en)
Fuel injector
Title (de)
Kraftstoffeinspritzdüse
Title (fr)
Injecteur à carburant
Publication
Application
Priority
EP 12185936 A 20120925
Abstract (en)
[origin: EP2711537A1] A fuel injector (10) for use in a high-pressure fuel injection system for an internal combustion engine is described. The fuel injector comprises a high-pressure fuel volume (32) defined by at least one wall (24a), a supply passage (30) for delivering high-pressure fuel to the high-pressure fuel volume (32) from a high-pressure fuel source, a valve needle (26) arranged to control fuel injection from one or more outlets of the injector, a surface associated with the valve needle (26) being exposed to fuel pressure within a control chamber (36), in use, a return flow path for conveying fuel from the control chamber (36) to a low-pressure drain, and a control valve (40) for controlling the flow of fuel through the return flow path. The return flow path comprises a return flow volume (62) disposed, at least in part, adjacent to the wall (24a) of the high-pressure fuel volume (32), thereby to promote heat transfer from the fuel in the return flow volume (62) to the fuel in the high-pressure fuel volume (32), in use. In this way, the fuel in the return flow path is cooled to avoid thermal breakdown of the fuel.
IPC 8 full level
F02M 63/00 (2006.01); F02M 47/02 (2006.01); F02M 53/04 (2006.01); F02M 55/00 (2006.01)
CPC (source: EP)
F02M 47/027 (2013.01); F02M 53/043 (2013.01); F02M 55/008 (2013.01); F02M 63/0015 (2013.01); F02M 63/0017 (2013.01); F02M 2700/077 (2013.01)
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
DOCDB simple family (publication)
EP 2711537 A1 20140326; EP 2711537 B1 20170816; WO 2014048605 A1 20140403
DOCDB simple family (application)
EP 12185936 A 20120925; EP 2013065539 W 20130723