EXHAUST GAS MUFFLER OF INTERNAL COMBUSTION ENGINE Russian patent published in 2006 - IPC F01N1/00 

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed muffler consists of housing divided by two partitions into intake, intermediate and outlet chambers, front and rear end face walls, intake and outlet perforated branch pipes whose inner cuts are arranged in intermediate chamber. Intake and outlet chambers of muffler are filled with sound-absorbing packing, and axes of perforated branch pipes are parallel to each other. Partitions are perforated and their surface is divided into faces, namely, central one and pass cross face with hole in central part through which intake or outlet perforated branch pipe passes, nonpass face and two peripheral faces, all adjoining central face. Pass cross face and adjoining peripheral faces are pointed to one side relative to central face, and nonpass cross face, to opposite side. Partitions are arranged in housing of muffler for contact of central faces of both partitions and they are orientated so that nonpass cross faces of partitions are arranged at opposite ends of muffler housing. Transition surface between pass cross and central faces is made to radius, and inclined projection is made on outer surface of central pointed to side of nonpass cross face.

EFFECT: improved efficiency of muffler.

3 cl, 8 dwg