Patent ID: 8679410
Filing Date: 2014-03-25
Classification: B01D,F01N,F02D

Abstract:
1. An exhaust purification system of an internal combustion engine, the exhaust purification system comprising: an exhaust purification catalyst arranged in an engine exhaust passage for reacting NO a precious metal catalyst carried on an exhaust gas flow surface of the exhaust purification catalyst; a basic exhaust gas flow surface part formed around the precious metal catalyst; and an electronic control unit, wherein the electronic control unit is configured to control a vibration of a concentration of hydrocarbons flowing into the exhaust purification catalyst within a predetermined range of amplitude and within a predetermined range of period, and is configured to control the vibration period of the concentration of hydrocarbons longer than the predetermined range, wherein at the time of engine operation, a demanded produced amount of the reducing intermediate required for chemically reducing the NO