| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress generation of minute particulate in atmospheric air by emission gas exhausted from an engine 1. <P>SOLUTION: Combustion gas exhausted from the engine 1 is exhausted to an outside of a vehicle from an outlet of an exhaust pipe 5 through a muffler after treatment to reduce influence to an environment by an exhaust emission post-treatment device 3. Dilution air exhaust pipe 6 is arranged concentrically in the exhaust pipe 5 and a dilution air supply pump 7 and a dilution air filter 8 are provided in an upstream. Dilution air is supplied in the exhaust pipe 5 by the dilution air supply pump 7 through the dilution air exhaust pipe 6 at a time of low vehicle speed or deceleration when dilution of emission gas by vehicle speed wind gets insufficient. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
