Exhaust gas purifier for internal combustion engine

Details Exhaust gas purifier for internal combustion engine Exhaust gas purifier for internal combustion engine

2006-04-05

2008-03-25

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S277000, C060S286000, C060S295000, C060S303000

Reexamination Certificate

active

07347043

ABSTRACT:
The exhaust gas purifier includes a fuel addition valve, an NOx catalytic converter, and a catalyst loaded PM filter. The catalyst temperature of catalyst loaded PM filter is increased to a target temperature by adding fuel to the exhaust gas from fuel addition valve, whereby PM trapped on the filter is purified. When the NOx catalytic converter is deteriorated, the target catalyst temperature of catalyst loaded PM filter is changed to a value larger than the target catalyst temperature when the NOx catalytic converter is in a normal state.

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