| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent damages on a turbine blade of a turbocharger and to efficiently reform a part of fuel into hydrogen by use of a reforming catalyst with an addition of a relatively small amount of the fuel from a fuel addition means to the reforming catalyst. <P>SOLUTION: A reforming catalyst 22 disposed in a collecting pipe unit 17b of an exhaust manifold 17 reforms a fuel 25 of an engine 11 into hydrogen, while a fuel addition means 23 supplies the fuel to the reforming catalyst. A platinum-based catalyst 36 produces ammonia from NOx in a fuel-rich exhaust gas and from the above hydrogen; and a selective reduction type catalyst 37 reduces NOx in the exhaust gas by using the ammonia as a reducing agent. A waste gate valve 39 adjust opening of a bypass pipe 38 to adjust a flow volume of the exhaust gas flowing into a turbine housing 19b of a turbocharger 19. A controller 54 controls the fuel addition means based on the operation condition of the engine and also controls the waste gate valve based on the detection output of a temperature sensor 47 that detects an entrance temperature of the turbine housing. <P>COPYRIGHT: (C)2013,JPO&INPIT |
