摘要:
A holding and sealing material (1) for a catalytic converter is disposed between a cylindrical catalyst carrier (3) and a metal shell (2) covering the outer periphery of the catalyst carrier (3). The holding and sealing material (1) comprises a fiber aggregate mainly comprised of alumina-silica based ceramic fibers having a mullite crystal content of 10 wt% or less, and the fiber aggregate is subjected to a needle punch treatment. Owing to the improved holding and sealing material, a catalytic converter having excellent durability and assemblage and having extremely low pollution characteristics is provided.
摘要:
The invention provides a muffler (10) for internal combustion engine having excellent durability (resistance to scattering) even when being exposed to a high-temperature exhaust gas and capable of maintaining high sound absorption coefficient over a long period. Such a muffler (10) comprises a metal tube (12) provided with a plurality of small holes (11), an inorganic fiber sound absorbing material (14) arranged on the outer periphery thereof and a metal shell (13) covering the outside of the sound absorbing material (14), in which a scattering prevention member (18) is disposed between the metal tube (12) and the sound absorbing material. The sound absorbing material (14) is a laminated structure of crystalline alumina fiber mat (15) and glass fiber mat (17). As the scattering prevention member (18), there is used a stainless woven wire cloth, a woven fabric made from inorganic fiber and a metal foil.
摘要:
The invention provides a muffler for internal combustion engine having excellent durability (resistance to scattering) even when being exposed to a high-temperature exhaust gas and capable of maintaining high sound absorption coefficient over a long period. Such a muffler comprises a metal tube provided with a plurality of small holes, an inorganic fiber sound absorbing material arranged on the outer periphery thereof and a metal shell covering the outside of the sound absorbing material, in which a scattering prevention member is disposed between the metal tube and the sound absorbing material. The sound absorbing material is a laminated structure of crystalline alumina fiber mat and glass fiber mat. As the scattering prevention member, there is used a stainless woven wire cloth, a woven fabric made from inorganic fiber and a metal foil.