| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure water for the addition of a sufficient quantity without shortage even during acceleration or the like during which a large quantity of NOx is emitted by improving a collection rate of condensation as compared with a conventional device. <P>SOLUTION: A dogleg 15 making exhaust gas 7 flow downward once and then turn upward is disposed in an exhaust route in which the exhaust gas 7 of which temperature is lowered to dew-point temperature or lower. A waterdrop capture wall 16 on which waterdrops moving straightly in a flow direction right before downward movement due to an inertia force collide is disposed at a downward flow of the dogleg 15. A water storage tank 19 is disposed immediately below the dogleg 15 to collect condensation water which collides on the waterdrop capture wall 16 and flows down to a bottom 18 of the dogleg 15 and condensation water which separates from the flow due to an inertia force when the exhaust gas 7 turns, and collides on the bottom 18 of the dogleg 15. This NOx reduction device includes a water addition means 27 guiding the condensation water from the storage tank 19 and adding it to a middle of an intake route. <P>COPYRIGHT: (C)2011,JPO&INPIT |
