| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, capable of activating an exhaust emission control catalyst and suppressing thermal degradation regardless of exhaust gas temperature. <P>SOLUTION: This exhaust gas control device comprises an inner pipe, an outer pipe, the exhaust emission control catalyst, and an outer pipe slide device. In accordance with the exhaust gas temperature, the outer pipe is slid by the outer pipe slide device, and the outer peripheral face of the inner pipe and the inner peripheral face of the outer pipe are contacted with or separated from each other. Due to this, amount of heat conducted from the inner pipe to the outer pipe is changed, and the exhaust gas temperature can be adjusted. Therefore, the exhaust emission control catalyst can be activated and thermal degradation can be suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
