(19)
(11) EP 0 921 302 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.09.2000 Bulletin 2000/36

(43) Date of publication A2:
09.06.1999 Bulletin 1999/23

(21) Application number: 98309515.9

(22) Date of filing: 20.11.1998
(51) International Patent Classification (IPC)7: F02M 47/02
(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: 06.12.1997 GB 9725802

(71) Applicant: Lucas Industries Limited
London W1Y 4DJ (GB)

(72) Inventor:
  • Cooke, Michael Peter
    Gillingham, Kent ME7 1DR (GB)

(74) Representative: Bailey, Richard Alan et al
Marks & Clerk, Alpha Tower, Suffolk Street Queensway
Birmingham B1 1TT
Birmingham B1 1TT (GB)

   


(54) Fuel injector


(57) A fuel injector comprises a valve needle (14) engageable with a seating to control fuel flow from a delivery passage (18) to an outlet opening (20), a control chamber (24) communicating with the delivery passage (18), the control chamber (24) being defined, in part, by a surface associated with the valve needle (14) orientated such that the application of fuel under pressure to the control chamber (24) applies a force to the valve needle (14) urging the valve needle (14) towards its seating, a control valve (62) controlling the fuel pressure within the control chamber (24), and a delivery valve (40, 46) responsive to the fuel pressure within the control chamber (24) to control the flow of fuel along the delivery passage (18) towards the seating.






Search report