(19)
(11) EP 1 321 664 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.10.2007 Bulletin 2007/44

(43) Date of publication A2:
25.06.2003 Bulletin 2003/26

(21) Application number: 02027840.4

(22) Date of filing: 12.12.2002
(51) International Patent Classification (IPC): 
F02M 63/02(2006.01)
F02M 37/20(2006.01)
 F02M 55/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 14.12.2001 JP 2001381415
25.10.2002 JP 2002310524

(71) Applicant: Denso Corporation
Kariya-city, Aichi-pref. 448-8661 (JP)

(72) Inventor:
  • Osaki, Masatoyo, Denso Corporation
    Kariya-shi, Aichi-pref. 448-8661 (JP)

(74) Representative: TBK-Patent 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Fuel injection system with an apparatus for removing air from fuel


(57) A pressure reducing valve (6) of an accumulation type fuel injection system of a multi-cylinder diesel engine opens during an engine starting operation or an idling operation immediately following the engine starting operation for a period corresponding to cooling water temperature or fuel temperature. Thus, the fuel in a high-pressure fuel passage leading from a fuel supply pump (3) to fuel injection valves (2) through the common rail (1) is discharged into a fuel tank (5). Accordingly, air entering the fuel supply pump (3) while the engine is stopped is discharged to the fuel tank (5) through fuel recirculating passages (13, 15, 16). As a result, the air delivered from the fuel supply pump (3) to the injector (2) is minimized and injection quantity control is stabilized when the engine is started.







Search report