EXHAUST GAS PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE

Title:

EXHAUST GAS PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2012/029190

Kind Code:

A1

Abstract:

In the engine exhaust passage of an internal combustion engine are arranged an exhaust gas purifying catalyst (13) and a hydrocarbon supply valve (15). A first and second hydrocarbon supply method are selectively utilized, wherein the first hydrocarbon supply method injects the hydrocarbons from the hydrocarbon supply valve (15) at a supply interval (ΔT) pre-defined such that the air-fuel ratio of the exhaust gas is reduced to the minimum required air-fuel ratio (X) and purifies the NOx contained in the exhaust gas, and the second hydrocarbon supply method reduces the amount of hydrocarbons supplied from the hydrocarbon supply valve (15) and supplies fuel to a fuel combustion chamber (2) during the late expansion stroke or exhaust stroke.

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Inventors:

UMEMOTO KAZUHIRO (JP)
YOSHIDA KOHEI (JP)
INOUE MIKIO (JP)

Application Number:

PCT/JP2010/065450

Publication Date:

March 08, 2012

Filing Date:

September 02, 2010

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
UMEMOTO KAZUHIRO (JP)
YOSHIDA KOHEI (JP)
INOUE MIKIO (JP)

International Classes:

F01N3/36; F01N3/08

Foreign References:

JP2008115838A	2008-05-22
JP2004301109A	2004-10-28
JP2003148132A	2003-05-21
JP2007514090A	2007-05-31
JP2008267217A	2008-11-06
JP2008286186A	2008-11-27
JP2008232003A	2008-10-02
JP3969450B2	2007-09-05

Other References: