| abstract |
PROBLEM TO BE SOLVED: To provide an exhaust structure of an internal combustion engine having a simple structure which is excellent in heat resistance, heat insulation and noise reduction. The exhaust structure (10, 20) includes a heat insulating layer (11) formed by winding stainless steel wool around the outer circumference of a stainless steel front pipe (4a) and stainless steel pipes (26a, 26b, 6b) constituting a main muffler (7). , 21 are provided. According to the present exhaust structure, each pipe is insulated even when high-temperature exhaust gas passes through each pipe. Further, when recycling the exhaust structure, it is not necessary to separate each pipe made of stainless steel and the heat insulating layer. The heat insulating layer is preferably made of the stainless steel wool to which an inorganic polymer precursor and / or an inorganic polymer is attached. [Selection diagram] Fig. 1 |