| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device which easily obtains high pressure air without being restricted by space, facilitates the atomization of the addition agent, and exhibits the function of a purifying portion highly precisely, an addition agent supply device to supply the addition agent, and an exhaust emission control system of an internal combustion engine. <P>SOLUTION: An addition agent injection valve 30 to inject to the exhaust gas flowing through an exhaust passage 62 is installed in the engine 11 side of a purifying portion 20 to purify the exhaust gas from the engine 11. The addition agent injection valve 30 supplies the addition agent to DPF 21 of the purifying portion 20, an NOx reduction catalyst 22 and an oxidization catalyst 23. Air pressurized in a suction passage 72 by a pressurized air introducing portion 50 with a supercharger 40 is supplied into the addition agent injection valve 30. Thereby, the addition agent injection valve 30 injects the pressurized air into the exhaust gas flowing through the exhaust passage 62 together with the addition agent. The high pressure air is injected with the addition agent, so that the addition agent to atomize is facilitated to form a fine particle, which exhibits the function of the purifying portion 20 precisely. <P>COPYRIGHT: (C)2008,JPO&INPIT |
