EXHAUST GAS PURIFICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2016/103627

A1

An exhaust gas purification system is provided with a first fuel supply unit to supply fuel to exhaust gas flowing in an exhaust passage of the internal combustion engine by means of a supply valve arranged in the exhaust passage, and a second fuel supply unit to supply fuel to exhaust gas to be discharged to the exhaust passage by adjusting a fuel injection condition in the internal combustion engine, wherein in a temperature raising stage of the NOx selective catalytic reduction catalyst associated with the exhaust gas temperature raising processing, first control is performed in which fuel is supplied by the first fuel supply unit, and in a temperature holding stage of the NOx selective catalytic reduction catalyst associated with the exhaust gas temperature raising processing, at least second control is performed in which the ratio of an amount of fuel supply by the second fuel supply unit with respect to an amount of fuel supply by the first fuel supply unit becomes higher in comparison with that when performing the first control.

MIKAMI AKIRA (JP)
NAKAYAMA SHIGEKI (JP)
TAKADA KEISHI (JP)
OHASHI NOBUMOTO (JP)
MATSUO JUNICHI (JP)

PCT/JP2015/006237

June 30, 2016

December 15, 2015

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TOYOTA MOTOR CO LTD (JP)

F01N3/08; F01N3/025; F01N3/035; F01N3/10; F01N3/20; F01N9/00; F01N13/00; F02D41/02

WO2014102932A1

2014-07-03

DE102008049098A1	2009-06-25
US20050050881A1	2005-03-10
US20130025264A1	2013-01-31
JP2009041437A	2009-02-26
JP2005030272A	2005-02-03
JP2014148908A	2014-08-21
JP2010180814A	2010-08-19
JP2014001683A	2014-01-09
JP2010116817A	2010-05-27

KAWAGUCHI, Yoshiyuki et al. (4-10 Higashi Nihonbashi 3-chome, Chuo-k, Tokyo 04, JP)

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