Exhaust purification system of internal combustion engine

Details Exhaust purification system of internal combustion engine Exhaust purification system of internal combustion engine

B - Operations, Transporting

01

D

B01D 53/94 (2006.01) B01D 53/56 (2006.01)

Patent

CA 2750738

An internal combustion engine in an engine exhaust passage of which a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged. On the exhaust purification catalyst (13), platinum Pt (51) is carried and a basic layer (53) is formed. A concentration of hydrocarbons flowing into the exhaust purification catalyst (13) is made to vibrate within a predetermined range of amplitude of 200 ppm or more and within a predetermined range of period of 5 seconds or less whereby NO x which is contained in the exhaust gas is reduced in the exhaust purification catalyst (13).

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