MUFFLER FOR AN INTERNAL COMBUSTION ENGINE

摘要

A muffler for an internal combustion engine that has a superior durability (fly-resistance) even when exposed to exhaust gas of high temperature and a high noise absorbing ratio over a long period of time. The muffler comprises a metal tube (12) having a plurality of small holes (11), an inorganic fibrous noise absorbing material (14) disposed on the outer circumference of the metal tube, a metal shell (13) covering the noise absorbing material (14), and a fly preventive material (18) provided between the inner tube (12) and the noise absorbing material (14). The noise absorbing material (14) is a laminated structure of layers of a crystalline alumina fiber mat (15) and a glass fiber mat-like substance (17). A metal net woven of stainless steel, a woven fabric of inorganic fibers or a metal foil, is used as the fly preventive material (18).