Exhaust purification system for internal combustion engine

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

2011-06-21

2011-06-21

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S297000, C060S295000, C060S288000, C060S311000, C060S301000

Reexamination Certificate

active

07963102

ABSTRACT:
The present invention provides a technology enabling regeneration of the purification performance of an exhaust purification device more reliably and more efficiently in an exhaust purification system combining a plurality of branch passages bifurcating from an exhaust passage and an exhaust purification device provided in each branch passage. When regenerating the purification performance of a first exhaust purification device provided in a first branch passage, a second valve provided in a second branch passage is set at a predetermined first intermediate opening and a first valve provided in the first branch passage is fully closed. Fuel is then added from a first fuel addition valve provided in the first branch passage.

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