| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas heating device for establishing temperature conditions earlier as required by an after-treatment device by actualizing active rise of an exhaust gas temperature independently of the operating condition of an engine. <P>SOLUTION: The exhaust gas heating device comprises an oxidation catalyst 12 provided on the way of an exhaust pipe 9, and a pre-oxidation catalyst 13 provided on the upstream side of a particulate filter 11 (the after-treatment device), wherein the exhaust gas temperature rises with reaction heat generated when unburnt fuel components remaining in exhaust gas 7 have oxidation reaction with the pre-oxidation catalyst 13. The pre-oxidation catalyst 13 is borne by a ceramic carrier 14, and a metal carrier 15 with an electric heater 15a is arranged at the front stage of the pre-oxidation catalyst 13. <P>COPYRIGHT: (C)2007,JPO&INPIT |
