Exhaust gas purification system for internal combustion engine

Details Exhaust gas purification system for internal combustion engine Exhaust gas purification system for internal combustion engine

2007-07-12

2011-12-13

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S277000, C060S295000, C060S301000

Reexamination Certificate

active

08074446

ABSTRACT:
The task for the present invention is to reduce more of an oxide that is stored in a NOx storage reduction catalyst, even in a case where a clogging has occurred in a reducing agent adding valve that is provided in an exhaust passage of an internal combustion engine. The present invention is provided with rich spike control performing means that, when an oxide that is stored in the NOx storage reduction catalyst is reduced, performs a rich spike control and that, when lowering the air-fuel ratio in the exhaust gas, performs addition of a reducing agent by the reducing agent adding valve multiple times, which is performed when a crank angle of the internal combustion engine is in a specified range. When the clogging has occurred in the reducing agent adding valve, the number of times the air-fuel ratio in the exhaust gas is lowered while the rich spike control is being performed by the rich spike control performing means is increased.

REFERENCES:
patent: 5445019 (1995-08-01), Glidewell et al.
patent: 6314722 (2001-11-01), Matros et al.
patent: 6487852 (2002-12-01), Murphy et al.
patent: 6619035 (2003-09-01), Matsuoka et al.
patent: 6932069 (2005-08-01), Suyama et al.
patent: 6983589 (2006-01-01), Lewis et al.
patent: 7257941 (2007-08-01), Reuter
patent: 7905085 (2011-03-01), Henning et al.
patent: 2004/0128982 (2004-07-01), Patchett et al.
patent: 2009/0049826 (2009-02-01), Toshioka et al.
patent: 1 176 289 (2002-01-01), None
patent: 1 176 295 (2002-01-01), None
patent: 1 331 373 (2003-07-01), None
patent: A 2002-38926 (2002-02-01), None
patent: A 2002-106332 (2002-04-01), None
patent: A 2003-286878 (2003-10-01), None
patent: A 2005-248760 (2005-09-01), None
patent: 2005-344682 (2005-12-01), None
patent: A-2005-344682 (2005-12-01), None
Dec. 9, 2009 Office Action issued in Japanese Patent Application No. 2006-191383 (with English translation).

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