MULTISECTIONAL SILENCER Russian patent published in 2006 - IPC F01N1/00 

FIELD: automotive industry.

SUBSTANCE: multisectional comprises cylindrical housing, face inlet branch pipe rigidly connected with the central pipe provided with perforation and defining at least one additional perforated pipe coaxial to the housing and central pipe. The faces of all pipes are rigidly connected with the housing via solid baffles. One of the baffles is secured to the inlet branch pipe, and the other one is mounted from the opposite side of the branch pipe. The first sound-absorbing member is interposed between the housing and perforated pipe. The second sound-absorbing member is set in the face section of the central pipe with the use of locking washer. The porosity of the first sound-absorbing member is lower than that of the second sound-absorbing member by a factor of 2.5-5.0.

EFFECT: improved silencing.

1 dwg