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

2007-07-24

2011-12-20

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, C060S287000, C060S301000

Reexamination Certificate

active

08079213

ABSTRACT:
An object of the invention is to provide a technique for improving the efficiency of performance regeneration process that is executed on NOx storage reduction catalysts provided in a plurality of branch passages branching from the exhaust passage and reduce emissions of NOx from an internal combustion engine to the atmosphere. When the quantity of NOx discharged from an internal combustion engine and flowing into an exhaust pipe is smaller than a predetermined quantity, fuel serving as reducing agent is added through a fuel addition valve while torque change moderating process is executed (from T0to T1). After that, a first flow rate control valve is closed to make the flow rate of the exhaust gas flowing in the first branch passage smaller than that in the second branch passage (from T1to T3).

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Chinese Office Action issued in Patent Application No. 200780027679.1; dated Aug. 17, 2010 (with translation).
International Search Report issued in Application No. PCT/JP2007/064837; dated Oct. 19, 2007.

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