Patent ID: 9517436
Filing Date: 2016-12-13
CPC Classification: B01D,F01N

Claim Text:
1. An exhaust purification system of an internal combustion engine comprising: an exhaust purification catalyst arranged in an engine exhaust passage, exhaust gas flow surfaces of the exhaust purification catalyst carrying precious metal catalysts thereon, basic exhaust gas flow surface parts formed around the precious metal catalysts, the exhaust purification catalyst having a property of reducing NO a hydrocarbon feed valve arranged in the engine exhaust passage upstream of the exhaust purification catalyst, the hydrocarbon feed valve being oriented to inject the hydrocarbons in an upstream direction of the engine exhaust passage; and an electronic control unit coupled to the hydrocarbon feed valve and configured to control injection of the hydrocarbons by the hydrocarbon feed valve so that, at a time of engine operation, the hydrocarbons are injected from the hydrocarbon feed valve within the predetermined range of period to thereby remove the NO