公开(公告)号：US20250067201A1

公开(公告)日：2025-02-27

申请号：US18801915

申请日：2024-08-13

Applicant: Tenneco Automotive Operating Company Inc.

Inventor： Gabriel OSTROMECKI ,  Nicholas Reding ,  Isidro L. Hernandez

IPC: F01N1/02 ,  F01N1/00

Abstract: 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.