Patent ID: 9638077
Date: 2017-05-02
CPC Classifications: F01N

Claim:
1. A muffler for an exhaust system of a vehicle driven by an internal combustion engine, the muffler comprising: a gas-tight housing; a partition wall disposed inside said housing, the partition wall dividing the interior of the housing into a first volume and a second volume separate from the first volume; an inlet pipe in fluid communication with the first volume; a first outlet pipe in fluid communication with the first volume; a switchable second outlet pipe in fluid communication with the first volume, the switchable second outlet pipe passing through the second volume, and the switchable second outlet pipe penetrating the partition wall; and a resonator pipe providing fluid communication between the first volume and the second volume, wherein: the switchable second outlet pipe is disposed inside the resonator pipe in a section where the switchable second outlet pipe penetrates the partition wall; the resonator pipe has a first section at which the resonator pipe is located inside the first volume and at which the second outlet pipe is not present; and the resonator pipe has a second section at which the resonator pipe accommodates the second outlet pipe.