(19)
(11) EP 1 598 540 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.05.2009 Bulletin 2009/19

(43) Date of publication A2:
23.11.2005 Bulletin 2005/47

(21) Application number: 05010987.5

(22) Date of filing: 20.05.2005
(51) International Patent Classification (IPC): 
F02D 41/22(2006.01)
F02M 65/00(2006.01)
 F02D 41/38(2006.01)
F02D 41/20(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: 21.05.2004 JP 2004152394

(71) Applicant: DENSO CORPORATION
Kariya-city, Aichi-pref. 448-8661 (JP)

(72) Inventor:
  • Nishiyori, Yoichi
    Kariya-city Aichi-pref., 448-8661 (JP)

(74) Representative: Winter, Brandl, Fürniss, Hübner Röss, Kaiser, Polte Partnerschaft Patent- und Rechtsanwaltskanzlei 
Alois-Steinecker-Strasse 22
85354 Freising
85354 Freising (DE)

   


(54) Fuel injection apparatus designed to diagnose failure in injection fuel into each cylinder of diesel engine


(57) A fuel injection apparatus for diesel engines is provided which is designed to diagnose a failure in injecting fuel into each cylinder of a diesel engine by monitoring a diagnostic signal appearing on a single diagnostic signal line. The apparatus includes an injection failure diagnosing circuit which select one of cylinders of the engine that is to be diagnosed, inhibit injectors from injecting the fuel into others of the cylinders when the injectors are required to inject the fuel into the others of the cylinders, and monitor the diagnostic signal to make an injection failure diagnosis of whether a failure in injecting the fuel into the selected one of the cylinders has occurred or not.







Search report