EXHAUST PURIFICATION APPARATUS FOR COMPRESSION-IGNITION INTERNAL COMBUSTION ENGINE

Title:

EXHAUST PURIFICATION APPARATUS FOR COMPRESSION-IGNITION INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2008/114885

Kind Code:

A1

Abstract:

In an internal combustion engine, a NOx selective reduction catalyst (15) is disposed in an engine exhaust passageway, and an oxidation catalyst (12) is disposed in the engine exhaust passageway upstream of the NOx selective reduction catalyst (15). At the starting of the engine, HC is fed to the oxidation catalyst (12) from a HC supply valve (28) and by the resultant oxidation reaction heat of HC, the NOx selective reduction catalyst (15) is heated. In this stage, the temperature of the NOx selective reduction catalyst (15) is raised to that falling in the HC desorption temperature range in which HC is desorbed from the NOx selective reduction catalyst (15).

Inventors:

TOSHIOKA SHUNSUKE (JP)
ODA TOMIHISA (JP)
ITOH TAKEKAZU (JP)
ITOH KAZUHIRO (JP)
TANAI YUTAKA (JP)

Application Number:

PCT/JP2008/055615

Publication Date:

September 25, 2008

Filing Date:

March 18, 2008

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
TOSHIOKA SHUNSUKE (JP)
ODA TOMIHISA (JP)
ITOH TAKEKAZU (JP)
ITOH KAZUHIRO (JP)
TANAI YUTAKA (JP)

International Classes:

F01N3/08; B01D53/94; F01N3/24; F01N3/28; F01N3/36

Foreign References:

JP2005264894A	2005-09-29
JP2000161046A	2000-06-13
JPH11257125A	1999-09-21
JP2001510260A	2001-07-31
JP2005023921A	2005-01-27

Other References: