Patent ID: 7013637
Filing Date: 2006-03-21
Classification: F02D,F02P,Y02T

Abstract:
1. An exhaust purification apparatus for an internal combustion engine, comprising: an exhaust gas purification catalyst disposed in an exhaust passage of the engine; and a controller that executes a poisoning release control of the exhaust gas purification catalyst when a predetermined condition is established, the poisoning release control including a normal mode and an exhaust gas composition mode before the normal mode, a manipulation parameter of the engine related to an exhaust gas composition being manipulated in such a manner that a hydrogen concentration in the exhaust gas flowing into the exhaust gas purification catalyst in the exhaust gas composition mode is higher than that in the normal mode, and wherein, in the exhaust gas composition mode, an ignition timing is set more toward an advance angle direction than in the normal mode.