Patent ID: 7096664
Filing Date: 2006-08-29
Classification: F01N,F02B,Y02T

Abstract:
1. An internal combustion engine in which a heat exchanger (H 1 to H 5 ) having a catalyst device ( 46 A to 46 D) integrally provided therewithin is arranged in an exhaust passage ( 33 ), the heat exchanger (H 1 to H 5 ) carrying out heat exchange between an exhaust gas and a working medium in a condition where the heat exchanger (H 1 to H 5 ) and its catalyst device ( 46 A to 46 D) are in direct contact with the exhaust gas, and the catalyst device ( 46 A to 46 D) purifying the exhaust gas, wherein the catalyst device ( said heat exchanger including a plurality of sections connected serially to one another, the first of said plurality of heat exchangers for first receiving the working medium at a downstream end of a flow of exhaust gas and for delivering the working medium at an upstream end of the flow of exhaust gas, at least another one of said plurality of sections other than the first heat exchanger being disposed at a position wherein a temperature difference of the exhaust gas and the working medium is the smallest.