(19)
(11) EP 1 167 723 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.06.2002 Bulletin 2002/25

(43) Date of publication A2:
02.01.2002 Bulletin 2002/01

(21) Application number: 01304818.6

(22) Date of filing: 31.05.2001
(51) International Patent Classification (IPC)7: F02D 1/18, F02M 41/14
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 22.06.2000 GB 0015191

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

(72) Inventors:
  • Wood, Christopher
    Rainham, Kent ME8 9BY (GB)
  • Hopley, Daniel Jeremy
    Gillingham, Kent ME7 5PR (GB)
  • Burborough, William Robert
    Hempstead, Gillingham, Kent ME7 3NZ (GB)

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

   


(54) Injection timing advance arrangement


(57) An advance arrangement comprises an advance piston (12) which is slidable within a first bore (14), the advance piston (12) cooperating, in use, with a cam arrangement of a fuel pump to adjust the timing of fuel delivery by the pump. A servo-piston (24) is slidable within a further bore (22) provided in the advance piston (12), a light load piston (26) being moveable relative to the advance piston (12) against the action of a light load control spring (28). A servo-control spring (34) is engaged between the light load piston (26) and the servo-piston (24) and a seal arrangement (30, 32) comprising at least one separate seal member, is arranged to form a substantially fluid tight seal between the servo-piston (24) and the light load piston (26). The servo-piston (24) may include a removable region (40), whereby removal of the region (40) permits the advance characteristics of the advance arrangement for light load conditions to be varied.






Search report