Tenneco Automotive Operating Company Inc.

Isidro Hernandez

Gabriel Ostromecki

Abdulhadi Madi

Prajwal Hanumantha Rao

Chris Kleinfeld

Rick Veneziano

Shi Zheng

Nicholas Reding

A muffler assembly for a vehicle exhaust system including a muffler that has a primary muffler conduit with a primary resonator, a secondary muffler conduit with a secondary resonator, and a valve that directs exhaust flow through both the primary and secondary muffler conduits or primarily through the secondary muffler conduit depending on the position of the valve. The muffler provides a first level of sound attenuation when the valve is in an open position and a second level of sound attenuation when the valve is in a closed position. The second level of sound attenuation is greater than the first level of sound attenuation and therefore the muffler provides a louder exhaust sound when the valve is in the open position and a quieter exhaust sound when the valve is in the closed position.

Dual mode muffler

A muffler for receiving exhaust gas from a combustion engine is disclosed. The muffler includes a casing and a pipe. The casing includes a shell coupled to first and second end caps that cooperate to define an internal volume. The pipe is disposed within the internal volume and extends substantially a length of the shell. Each of the first and second end caps includes a circumferentially extending flange engaging an outer surface of the pipe to provide support for the pipe. Each circumferentially extending flange extends at an acute angle relative to a shell axis of the shell. Each circumferentially extending flange is coaxial along a pipe axis of the pipe.

Muffler with internally supported tuner

A combined exhaust gas aftertreatment/dust ejector unit () is provided for use with a combustion process () and an air cleaner () of the combustion process (). The unit () includes an elongate housing () containing an exhaust gas aftertreatment device () and having a radial exhaust gas outlet () to direct an exhaust gas flow () radially from the housing (), and a dust ejector () including an ejector outlet () positioned in the exhaust gas outlet (). The exhaust gas outlet () and the ejector outlet () have elliptical shaped cross sections (), with the ejector outlet cross section () spaced inwardly from the exhaust gas outlet () to define a reduced flow area () for the exhaust gas flow () to accelerate the exhaust gas flow () past the ejector outlet ().

Combined exhaust gas aftertreatment/air cleaner dust and ejector unit

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Ypsilanti, MI, United States of America

Isidro Hernandez