Systems for and methods of evacuating air from a muffler while it is being filled with a fibrous material are disclosed.

A silencing apparatus is provided with a shell, ventilation pipes communicating with the inside of the shell, insertion holes which are respectively formed in the shell so as to have sizes smaller than surrounding skirt parts and allow the ventilation pipes to be loosely inserted in, and partitions partitioning the inside of the shell. In the silencing apparatus, at least, a sound-absorbing chamber partitioned by the partition and positioned adjacent to the insertion hole is filled with a sound-absorbing fiber material, and a sound-absorbing fiber material filling gap between the insertion hole and the ventilation pipe is closed by an annular closing member. To provide a silencing apparatus allowing a sound-absorbing chamber to be filled with sound-absorbing fiber material without a gap, even in a complicated configuration having the inside of a shell partitioned by a partition.

Method and system for filling a muffler with fibrous material. The muffler includes a muffler shell comprising a first shell member and a second shell member, at least one partition extending between the first and second shell members, and at least one slot formed in the first shell member above the partition. The first shell member is positioned and held relative to the second shell member to form an open portion, a closed portion, and a space between an upper surface of the partition and the first shell member. Fluid is introduced into the space through a fluid delivery device inserted into the muffler shell through the slot, and fibrous material is introduced into the muffler shell through a filling nozzle inserted into the muffler shell through the open portion. The fluid delivery device and nozzle are removed after filling and the shell members are closed and affixed.

Methods and systems for filling a muffler body with a fibrous material prior to completing assembly of the muffler body are disclosed. The muffler body is composed of two half shells and the fibrous material is injected between the shells by a filling nozzle.

Methods and systems for filling a muffler body with a fibrous material prior to completing assembly of the muffler body are disclosed.

Systems for and methods of evacuating air from a muffler while it is being filled with a fibrous material are disclosed.

Methods of and systems for filling a muffler body with a fibrous material prior to completing assembly of the muffler body are disclosed. The methods and systems prevent or otherwise reduce undesired migration of the fibrous material within the muffler body.

A repackable muffler and repackable muffler kit for all terrain vehicles (ATV), dirt bikes, motorcycles and the like are provided. The inlet end cap and exhaust of the muffler are secured using clamps therefore minimizing the time required to repack the muffler.

A method for filling a silencer with a sound absorbing material in which an inside of a shell is partitioned into a plurality of silencing chambers by a separator and at least one silencing chamber is filled with the material, the method including: forming a hole at the silencing chamber to be filled with the material in the shell; inserting a filling nozzle into the silencing chamber from the hole; injecting the material from the filling nozzle into the silencing chamber S2 for filling; and externally sealing the hole opening to the shell with a hole sealing member. An outer peripheral flange portion is abutted on and welded to an outer surface of the shell to seal the hole with the hole sealing member 8 allowing stably holding the silencer and easily filling the silencer with the material irrespective of a shell shape and a structure inside the shell.

An exhaust muffler in which the anti-scattering property of a sound deadening element is high and for which shaping is not required and a sound deadening element for use with the exhaust muffler. An exhaust muffler includes an expansion chamber into which exhaust gas of an engine is introduced, and a sound deadening element in which the expansion chamber is inserted. The sound deadening element is configured from a knitted article formed by knitting continuous fibers of glass fiber. The exhaust muffler further includes an inner pipe inserted in a spaced relationship from an inner circumferential wall of the expansion chamber in the expansion chamber and configured to introduce the exhaust gas therethrough. The sound deadening element is disposed between an outer circumferential wall of the inner pipe and the inner circumferential wall of the expansion chamber.