Exhaust control device for an internal combustion engine

Details Exhaust control device for an internal combustion engine Exhaust control device for an internal combustion engine

2007-12-14

2011-10-11

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, C060S276000, C060S295000, C060S301000

Reexamination Certificate

active

08033097

ABSTRACT:
An exhaust control device for an internal combustion engine, comprises: a NOx purifying catalyst disposed in an exhaust system; and a rich control means for calculating a fuel injection amount based on a difference between a target exhaust air fuel ratio and an actual exhaust air fuel ratio to feedback-control the actual exhaust air fuel ratio so that a reducing atmosphere is created in the exhaust system to thereby reduce NOx trapped by the NOx purifying catalyst, wherein the rich control means includes a learning means for calculating and updating a control correction value of the fuel injection amount based on an actual control value of the fuel injection amount during the feedback control, and wherein the fuel injection amount is calculated during the feedback control by using the control correction value.

REFERENCES:
patent: 2006/0130457 (2006-06-01), Hirowatari et al.
patent: 2002-201985 (2002-07-01), None
patent: 2002-266630 (2002-09-01), None
patent: 2006-226219 (2006-08-01), None
Japanese Office Action for Application No. 2006-337698, dated Apr. 23, 2009.

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