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Title:
EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER
Document Type and Number:
WIPO Patent Application WO/2010/073354
Kind Code:
A1
Abstract:
An exhaust purifying device for an internal combustion engine having a supercharger can suitably simultaneously achieve both the prevention of excessive rise in back pressure and the assurance of exhaust gas emission performance. The exhaust purifying device has a turbo-supercharger (16) having a turbine (16a) provided in an exhaust path (14) and operated by exhaust energy of the engine (10), a first front-stage catalyst (18) and a second front-stage catalyst (20) arranged in the exhaust path (14) in that order from the upstream side, a first exhaust bypass path (24) bypassing the turbine (16a), a second exhaust bypass path (26) bypassing the turbine (16a) and the first front-stage catalyst (18), and a first wastegate valve (28) and a second wastegate valve (30) for respectively opening and closing the first exhaust bypass path (24) and the second exhaust bypass path (26).

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Inventors:
OKADA YOSHIHIRO (JP)
Application Number:
PCT/JP2008/073683
Publication Date:
July 01, 2010
Filing Date:
December 26, 2008
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
OKADA YOSHIHIRO (JP)
International Classes:
F01N3/20; F02B37/00
Foreign References:
JPH11173138A1999-06-29
JP2003129852A2003-05-08
JPS6276225U1987-05-15
JP2002276346A2002-09-25
JPS63202729A1988-08-22
JPH09125941A1997-05-13
JPS6473138A1989-03-17
Other References:
See also references of EP 2372122A4
Attorney, Agent or Firm:
TAKAHASHI, Hideki et al. (JP)
Hideki Takahashi (JP)
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