Exhaust gas purifying system for internal combustion engine

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

2006-09-19

2006-09-19

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...

C060S286000, C060S295000, C060S297000

Reexamination Certificate

active

07107760

ABSTRACT:
An exhaust gas purifying system for an internal combustion engine is arranged to determine a recovery execution timing for recovery processing of recovering an exhaust gas purifying device such as a particulate filter and a NOx trap catalyst from a specific content stacked state, to determine a target air/fuel ratio for executing the recovery processing, to determine a first engine controlled variable relating to an air/fuel ratio on the basis of the target air/fuel ratio, and to determine a second engine controlled variable relating to a combustion period at a value different from a value employed during normal processing when the recovery processing is executed.

REFERENCES:
patent: 6568177 (2003-05-01), Surnilla
patent: 6796118 (2004-09-01), Kitahara
patent: 2004/0016227 (2004-01-01), Kitahara
patent: 2000-179326 (2000-06-01), None
patent: 2002-155793 (2002-05-01), None

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