To provide an exhaust emission control device for an internal combustion engine, achieving early activation of a catalyst while suppressing fuel consumption.
This exhaust emission control device for the internal combustion engine includes: an oxidation catalyst 25 arranged in an exhaust passage of the internal combustion engine 10; a heat storage material 50 temporarily storing heat and releasing stored heat for activating the oxidation catalyst 25; and a burner 60 supplying combustion gas with fuel burnt for activating the oxidation catalyst 25 to the exhaust passage 15. The exhaust passage 15 is formed with first and second branch passages 15A, 15B provided upstream of the oxidation catalyst 25, branched into two and rejoined. A selector valve selectively changing over an exhaust gas flow to one of the first and second branch passages is provided in a branch portion for the first and second branch passages 15A, 15B. The heat storage material 50 is provided in the first branch passage 15A, and the burner 60 is provided in the second branch passage 15B.
COPYRIGHT: (C)2010,JPO&INPIT
ODA TOMIHISA
OHASHI NOBUMOTO
KAWAGUCHI BUNGO
KOBAYAKAWA SATOSHI
Kazuo Abe
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