Patent ID: 8042649
Filing Date: 2011-10-25
Classification: F01N

Abstract:
1. A vehicular muffler comprising: a hollow outer case; a plurality of tubular inner sleeves, formed of porous material, which are disposed inside of the outer case and which are operatively connected, at a first end thereof, to an exhaust feed pipe; and an outlet pipe having a first end which is disposed inside of the outer case and which is operatively connected to the respective inner sleeves, said outlet pipe operable to discharge an exhaust gas to an outside environment via an outlet side of the outer case; wherein the tubular inner sleeves have openings formed therein along substantially the entire length thereof, and are spaced away from each other so as to be out of contact with one another; wherein the plurality of inner sleeves are connected to the exhaust feed pipe by way of a first expansion chamber comprising: