Exhaust purification device for internal combustion engine

Abstract

The present invention provides an exhaust purification device for an internal combustion engine including exhaust purification members in an exhaust passage downstream of the turbine of a turbocharger. This exhaust purification device for the internal combustion engine is provided with a heating gas supply unit to supply heating gas to the exhaust purification members, a heating gas supply unit including a catalyst that is provided in the exhaust passage between the turbine and the exhaust purification member and has an oxidative function, a fuel addition means located upstream of the catalyst and a heating means located upstream of the catalyst. The fuel addition means and heating means are provided in a chamber that communicates with the exhaust passage between the turbine and the catalyst.

1 - 6 . (canceled) 
     
     
         7 . An exhaust purification device for an internal combustion engine comprising an exhaust purification member in an exhaust passage downstream of a turbine of a turbocharger, the exhaust purification device comprising:
 a heating gas supply unit to supply heating gas to the exhaust purification member, the heating gas supply unit comprising a catalyst that is provided in the exhaust passage between the turbine and the exhaust purification member and has an oxidative function, a fuel addition means located upstream of the catalyst, and a heating means located upstream of the catalyst;   wherein the fuel addition means and heating means are provided in a chamber that communicates with the exhaust passage between the turbine and the catalyst, and   the chamber is located relative to the exhaust passage in such a way that fluid in the chamber flows along a swirling flow of exhaust gas that flew out of the turbine, into the exhaust passage.   
     
     
         8 . The exhaust purification device for the internal combustion engine according to  claim 7 , wherein the chamber is provided relative to the exhaust passage in such a way that the axis of the chamber is angled at a  30 -degree or less angle relative to a plane orthogonal to the axis of the exhaust passage. 
     
     
         9 . The exhaust purification device for the internal combustion engine according to  claim 7 , further comprising a passage connecting the chamber and an exhaust passage upstream of the turbine. 
     
     
         10 . The exhaust purification device for the internal combustion engine according to  claim 7 , further comprising a second fuel addition means in the turbine or an exhaust passage upstream of the turbine. 
     
     
         11 . The exhaust purification device for the internal combustion engine according to  claim 10 , wherein a controller to control actuation of the fuel addition means and actuation of the second fuel addition means synchronizes the actuation timing of the fuel addition means and an actuation timing of the second fuel addition means so that exhaust gas containing fuel added via the second fuel addition means and fluid in the chamber merge into each other in the exhaust passage between the turbine and the catalyst. 
     
     
         12 . An exhaust purification device for an internal combustion engine comprising an exhaust purification member in an exhaust passage downstream of a turbine of a turbocharger, the exhaust purification device comprising:
 a heating gas supply unit to supply heating gas to the exhaust purification member, the heating gas supply unit comprising a catalyst that is provided in the exhaust passage between the turbine and the exhaust purification member and has an oxidative function, a fuel addition unit located upstream of the catalyst, and a heating unit located upstream of the catalyst;   wherein the fuel addition unit and heating unit are provided in a chamber that communicates with the exhaust passage between the turbine and the catalyst, and   the chamber is located relative to the exhaust passage in such a way that fluid in the chamber flows along a swirling flow of exhaust gas that flew out of the turbine, into the exhaust passage.