EP 3990772 A1 20220504 - FUEL INJECTOR WITH CLOSED LOOP DETECTION
Title (en)
FUEL INJECTOR WITH CLOSED LOOP DETECTION
Title (de)
KRAFTSTOFFINJEKTOR MIT ERKENNUNG VON GESCHLOSSENEM KREISLAUF
Title (fr)
INJECTEUR DE COMBUSTIBLE À DÉTECTION EN CIRCUIT FERMÉ
Publication
Application
Priority
- GB 201909257 A 20190627
- EP 2020068160 W 20200626
Abstract (en)
[origin: GB2585064A] A fuel injector comprises a nozzle 12 with a body 24 defining an internal bore 28 in which a needle 30 is axially moveable and having a spray extremity with injection orifice(s). The needle has an axially symmetrical shaft portion 32 which is tapered at an end 34 and defines a male seating face 44 that cooperates with a female tapered seating face 46 in the needle bore, upstream of the injection orifice(s). The needle includes a protruding annular collar 36 that divides the internal volume of the bore, the collar including substantially symmetrically configured passage means (36.1, Figure 2). A control valve arrangement 14, including a three-way valve, pilots the needle via a control chamber 50. The injector includes a detection circuit 58 in which the needle forms a switch. The female tapered seating face is conical and the male tapered seating face includes a conical surface having an angle (β, Figure 2) of greater than 75°. The control valve may include a fuel escape path (80, Figure 3) connecting the control chamber to a low pressure side of the injector and a fuel feed path (78, Figure 3) connecting the control chamber to a high pressure side of the injector.
IPC 8 full level
F02M 65/00 (2006.01); F02M 47/02 (2006.01); F02M 57/00 (2006.01); F02M 61/12 (2006.01); F02M 61/18 (2006.01); F02M 61/20 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP GB)
F02D 41/14 (2013.01 - GB); F02D 41/20 (2013.01 - GB); F02D 41/30 (2013.01 - GB); F02D 41/3005 (2013.01 - EP); F02M 47/027 (2013.01 - EP); F02M 57/005 (2013.01 - EP GB); F02M 61/12 (2013.01 - EP); F02M 61/1873 (2013.01 - EP GB); F02M 61/1886 (2013.01 - GB); F02M 61/1893 (2013.01 - EP GB); F02M 61/205 (2013.01 - EP); F02M 63/0045 (2013.01 - EP); F02M 65/005 (2013.01 - EP GB); F02D 41/20 (2013.01 - EP); F02D 2400/22 (2013.01 - EP); F02M 2200/02 (2013.01 - GB); F02M 2200/28 (2013.01 - EP); F02M 2547/003 (2013.01 - EP)
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)
GB 201909257 D0 20190814; GB 2585064 A 20201230; GB 2585064 B 20211110; EP 3990772 A1 20220504; EP 3990772 B1 20241030; WO 2020260666 A1 20201230
DOCDB simple family (application)
GB 201909257 A 20190627; EP 2020068160 W 20200626; EP 20737106 A 20200626