An object is to provide an exhaust purifying system for an internal combustion engine having an NSR catalyst, which can inhibit emissions from being aggravated by blow-by of NOx. An exhaust purifying system for an internal combustion engine 10 capable of a...

In an exhaust purification device of an internal combustion engine, a pair of upstream side NO x storage catalysts 15a 15b storing NO x contained in the exhaust gas when the air-fuel ratio of the inflowing exhaust gas is lean and releasing the stored NO x ...

Disclosed is an exhaust gas purification method, and also disclosed is an exhaust gas purification system (1). The exhaust gas purification system (1) comprises, in order from the upstream side of an exhaust passage (11) of an internal combustion engine (1...

A device for purifying exhaust gas of a diesel engine comprising a first continuous regeneration type diesel particulate filter (DPF) (12) arranged in the exhaust gas passage of the engine, a second continuous regeneration type DPF (13) having a capacity s...

A first catalyst 21 which stores or releases oxygen according to an air-fuel ratio, and a second catalyst 22 which traps or releases NOx according to the air-fuel ratio, are provided in an exhaust passage 9 of an engine 1. A controller 6 temporarily shifts...