(19)
(11) EP 1 065 368 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.07.2002 Bulletin 2002/31

(43) Date of publication A2:
03.01.2001 Bulletin 2001/01

(21) Application number: 00305414.5

(22) Date of filing: 28.06.2000
(51) International Patent Classification (IPC)7: F02M 57/02, F02M 45/02, F02M 47/02, F02M 59/36
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 30.06.1999 GB 9915118

(71) Applicant: Delphi Technologies, Inc.
Troy, MI 48007 (US)

(72) Inventors:
  • Lambert, Malcolm David Dick
    Bromley, Kent BR2 9LN (GB)
  • Buckley, Paul
    Gillingham, Kent ME8 9ES (GB)

(74) Representative: Pople, Joanne Selina 
Marks & Clerk, Alpha Tower, Suffolk Street, Queensway
Birmingham B1 1TT
Birmingham B1 1TT (GB)

   


(54) Fuel injector


(57) A fuel injector has a valve needle (12) slidable within a bore (11) formed in a nozzle (10). The valve needle (12) is engageable with a seating to control delivery of fuel from the bore (11). The injector also includes a supply passage (37) for supplying fuel under high pressure to the bore (11). A surface of a piston (18) adapted to engage with the needle (12) is exposed to the fuel pressure within a control chamber (39) which communicates continuously through an inlet passage (38) with the supply passage (37). The control chamber (39) further communicates, through an outlet passage (40), with an injection control valve (21-25) arranged to control communication between the control chamber (39) and a drain port. The inlet and outlet passages (38 and 40) are shaped to restrict the rate at which fuel can flow to and from the control chamber (39).






Search report