EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2014/103505

Kind Code:

A1

Abstract:

In order to prevent a decrease in the NOx purification rate when an addition is carried out to prevent the clogging of a reducing agent addition valve, a fuel addition valve, a catalyst having oxidizing ability, and a selective reduction NOx catalyst are provided in this order in the exhaust passage of an internal combustion engine, and when a prescribed condition for injecting fuel from a fuel addition valve is satisfied, the amount of fuel injected from the fuel addition valve is made less when the temperature of the selective reduction NOx catalyst is within a prescribed temperature range than when the temperature is outside of the prescribed temperature range.

Inventors:

IWATANI KAZUKI (JP)

Application Number:

PCT/JP2013/079574

Publication Date:

July 03, 2014

Filing Date:

October 31, 2013

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
IWATANI KAZUKI (JP)

International Classes:

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

Foreign References:

JP2012007557A	2012-01-12
JP2007239500A	2007-09-20
JP2005106047A	2005-04-21
JP2007064183A	2007-03-15
JP2004060515A	2004-02-26
JP2007071175A	2007-03-22
JP2009138731A	2009-06-25

Other References: