(19)
(11) EP 1 609 979 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.08.2008 Bulletin 2008/35

(43) Date of publication A2:
28.12.2005 Bulletin 2005/52

(21) Application number: 05012225.8

(22) Date of filing: 07.06.2005
(51) International Patent Classification (IPC): 
F02M 47/02(2006.01)
F02M 59/10(2006.01)
F02M 61/16(2006.01)
 F02M 57/02(2006.01)
F02M 59/46(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 21.06.2004 JP 2004182252

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

(72) Inventors:
  • Taguchi, Tooru c/o Denso Corporation
    Kariya-city Aichi-pref., 448-8661 (JP)
  • Matsumoto, Shuichi c/o Denso Corporation
    Kariya-city Aichi-pref., 448-8661 (JP)
  • Oodaira, Shougo c/o Denso Corporation
    Kariya-city Aichi-pref., 448-8661 (JP)

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

   


(54) Injector for fuel injection unit


(57) An injector body (B1) is provided with a longitudinal hole (31) eccentrically to the injector body (B1) to install an actuator (3) and a hydraulic power transmission unit (4). A high-pressure fuel passage (1) is disposed in a thick wall portion formed at a side of the longitudinal hole (31). A space in the longitudinal hole (31) functions as a low-pressure fuel chamber (22) and connected to an outer leakage passage. A groove (32) is formed on an inner side wall of the hole 31 to be connected to a low-pressure fuel passage (23) to provide a low-pressure fuel passage groove (26) to discharge leakage fuel from an injection nozzle portion (103) and a control valve portion (102). It is easy to machine the groove (32) integral with the longitudinal hole (31) and to secure strength of a periphery of the high-pressure fuel passage (1).







Search report