Patent ID: 8091341

Claim:
An exhaust gas purification system, comprising: an exhaust gas purifier in an exhaust passage of an internal combustion engine; an exhaust pipe injector for injecting a purification agent, to be consumed in the exhaust gas purifier, into the exhaust passage on an upstream side of the exhaust gas purifier; a dispersing member downstream of the injector and having a collision surface which is acute or obtuse relative to the injection direction, wherein an injection port of the exhaust pipe injector injects the purification agent in the injection direction which is parallel to a flow direction of the exhaust gas and the dispersing member has a length that extends in the injection direction, a tip of the dispersing member is formed in a cone shape, the tip of the dispersing member is disposed on the upstream side of the dispersing member, the purification agent is injected toward the cone-shaped tip, and the cone-shaped tip faces the injection port.