Title (en)

FUEL INJECTOR

Title (de)

KRAFTSTOFFEINSPRITZVENTIL

Title (fr)

INJECTEUR DE CARBURANT

Publication

EP 3150839 A1 20170405 (EN)

Application

EP 16190307 A 20160923

Priority

GB 201517148 A 20150929

Abstract (en)

A fuel injector (10) for a compression ignition internal combustion engine is described. The fuel injector (10) comprises a fuel injection valve having an injection valve member (14) moveable, in use, under the influence of fuel pressure within a control chamber (20) acting upon it, between a closed position and an open position. The fuel injector comprises a moveable plate (28) located inside the control chamber (20). The moveable plate (28) is configured to move into and out of contact with a sealing surface (34) of the control chamber (20). The moveable plate (28) includes an inlet orifice (38) and a spill orifice (40). The provision of inlet and spill orifices (38, 40) in the moveable plate allows both orifices to be made very small, resulting in a significant reduction in dynamic leakage. An embodiment of the invention is described in which the moveable plate (28) defines additional fluid channels (60a, 60b, 62a, 62) for high pressure fuel entering the control chamber (20) when the moveable plate (28) is moved out of sealing contact with the sealing surface (34) of the control chamber (20). The additional flow paths allow high pressure fuel to enter the control chamber (20) bypassing the inlet orifice, resulting in a rapid termination of an injection event.

IPC 8 full level

F02M 47/02 (2006.01); F02M 61/20 (2006.01); F02M 63/00 (2006.01)

CPC (source: EP)

F02M 47/027 (2013.01); F02M 61/20 (2013.01); F02M 63/0029 (2013.01); F02M 63/0045 (2013.01); F02M 2200/28 (2013.01)

Citation (search report)

• [XA] EP 2628939 A1 20130821 - BOSCH GMBH ROBERT [DE]
• [X] WO 03071122 A1 20030828 - CRT COMMON RAIL TECH AG [CH], et al
• [X] DE 102012204837 A1 20131002 - CONTINENTAL AUTOMOTIVE GMBH [DE]
• [A] US 2010301143 A1 20101202 - ADACHI NAOFUMI [JP], et al

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)

EP 3150839 A1 20170405; EP 3150839 B1 20180523; GB 201517148 D0 20151111

DOCDB simple family (application)

EP 16190307 A 20160923; GB 201517148 A 20150929