Silencer for vehicle exhausts has housing with double-layered metal sleeve with air ring gap between sleeves defined by spacers and having ventilation hole in inner or outer plate

摘要

The silencer comprises a housing with a double-layered metal sleeve (1) with an air ring gap (12) formed between the inner plate (8) and outer plate (7) of the sleeve and defined by spacers (11). At least or just one ventilation hole (13) is provided in the inner or outer plate. The spacers can be formed in the surface structure of the inner plate or outer plate. -