(19)
(11) EP 0 809 012 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.03.1999 Bulletin 1999/12

(43) Date of publication A2:
26.11.1997 Bulletin 1997/48

(21) Application number: 97107793.8

(22) Date of filing: 13.05.1997
(51) International Patent Classification (IPC)6: F02M 25/07
(84) Designated Contracting States:
DE GB IT

(30) Priority: 14.05.1996 JP 119112/96
27.11.1996 JP 316496/96
14.02.1997 JP 30304/97

(71) Applicants:
  • NIPPON SOKEN, INC.
    Nishio-shi Aichi-Ken (JP)
  • DENSO CORPORATION
    Kariya-City Aichi-Pref. 448 (JP)

(72) Inventors:
  • Suzuki, Fuminori
    Nishio-shi, Aichi (JP)
  • Enomoto, Shigeiku
    Nishio-shi, Aichi (JP)
  • Takeuchi, Yukihiko
    Kariya-city, Aichi 448 (JP)
  • Ooiwa, Hidetoshi
    Kariya-city, Aichi 448 (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)

   


(54) Exhaust gas recirculation device


(57) In an engine, in order to prevent a deposit from building up at an EGR exhaust port to close the port or to prevent an EGR valve from sticking, an EGR valve is provided in a upper portion of an intake pipe, and a valve seat portion thereof is separated from the intake pipe by a partition flange. An EGR gas passing through the EGR valve flows from the inflowing port of an inflowing passage into an intake air and is mixed with this. An oil component is contained in a blow-by gas flowing from the inflowing port on the upstream side, therefore this is adhered to the inner surface of the intake pipe and forms an oil film, but this oil flows downward due to gravity and the valve seat located above is covered by the partition flange, therefore it is possible to prevent the oil intruding into the EGR valve and the carbon particles in the EGR gas mixing with the oil in the blow-by gas to form a deposit.






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