Title:
EXHAUST PURIFICATION DEVICE OF SPARK IGNITION INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/024311
Kind Code:
A1
Abstract:
According to the present invention, a ternary catalyst (20) having an oxygen storage function and an exhaust purification catalyst (22) are disposed in an engine exhaust passage. Noble metal catalysts (61, 62) are supported on the surface of an exhaust gas flow passage of the exhaust purification catalyst (22), and a basic exhaust gas flow passage surface portion is formed around the noble metal catalysts (61, 62). When the engine is operated, the air-fuel ratio in a combustion chamber (5) is temporarily switched from lean to rich in cycles within a pre-established range, whereby the NOx contained in the exhaust gas is purified.
Inventors:
BISAIJI YUKI (JP)
YOSHIDA KOHEI (JP)
SAKURAI KENJI (JP)
YOSHIDA KOHEI (JP)
SAKURAI KENJI (JP)
Application Number:
PCT/JP2012/070522
Publication Date:
February 13, 2014
Filing Date:
August 10, 2012
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
BISAIJI YUKI (JP)
YOSHIDA KOHEI (JP)
SAKURAI KENJI (JP)
BISAIJI YUKI (JP)
YOSHIDA KOHEI (JP)
SAKURAI KENJI (JP)
International Classes:
F01N3/08; F02D41/04
Domestic Patent References:
| WO2011118044A1 | 2011-09-29 | |||
| WO2012014330A1 | 2012-02-02 | |||
| WO2012111171A1 | 2012-08-23 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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