Exhaust gas purifying system

Abstract

An exhaust gas purifying system removes particulate matter from exhaust gas from an engine through an exhaust passage. The system includes a filter, a reforming catalyst, an injector, and a heat transfer member. The filter is provided in the exhaust passage and collects the particulate matter in the exhaust gas. The reforming catalyst is provided in the exhaust passage and generates the heat of reaction by reforming fuel. The injector supplies the fuel to the reforming catalyst. The heat transfer member is in directly contact with the filter and the reforming catalyst to transfer the heat therebetween.

1 . An exhaust gas purifying system for removing particulate matter from exhaust gas from an engine through an exhaust passage, comprising:
 a filter provided in the exhaust passage and collecting the particulate matter in the exhaust gas;   a reforming catalyst provided in the exhaust passage and generating the heat of reaction by reforming fuel;   an injector supplying the fuel to the reforming catalyst; and   a heat transfer member being in directly contact with the filter and the reforming catalyst to transfer the heat therebetween.   
   
   
       2 . An exhaust gas purifying system for removing particulate matter from exhaust gas from an engine through an exhaust passage, comprising:
 a filter provided in the exhaust passage and collecting the particulate matter in the exhaust gas;   a reforming catalyst provided in the exhaust passage and being in directly contact with the filter, the reforming catalyst generating the heat of reaction by reforming fuel; and   an injector supplying the fuel to the reforming catalyst.   
   
   
       3 . The exhaust gas purifying system according to  claim 1 , wherein the reforming catalyst circumferentially surrounds the filter. 
   
   
       4 . The exhaust gas purifying system according to  claim 1 , further comprising a heating member provided upstream of the filter and allowing the exhaust gas to flow downstream therethrough, the heating member receiving the heat of reaction generated at the reforming catalyst. 
   
   
       5 . The exhaust gas purifying system according to  claim 1 , wherein the heat transfer member is in surface contact with the reforming catalyst and the filter. 
   
   
       6 . The exhaust gas purifying system according to  claim 1 , wherein the heat transfer member has a hollow cylindrical shape, the reforming catalyst is disposed outside of the heat transfer member, and the filter is disposed inside the heat transfer member. 
   
   
       7 . The exhaust gas purifying system according to  claim 1 , wherein the heat transfer member is a partition wall to separate the filter and the reforming catalyst.