Patent ID: 8684131
Filing Date: 2014-04-01
Classification: F01N

Abstract:
1. A dual muffler comprising: an inlet pipe, an end of which an exhaust gas is introduced from an engine; an outlet pipe, an end of which is connected to an opposite end of the inlet pipe, branched at the opposite end of the inlet pipe running toward a side and the opposite side such that the exhaust gas from the inlet pipe is discharged through opposite ends of the dual muffler; a housing surrounding the inlet pipe and the outlet pipe to expose the end of the inlet pipe and the opposite end of the outlet pipe to an outside environment; a plurality of baffles inserted into a side of the housing to partition an internal space of the housing wherein an outlet pipe is inserted through at least one of the baffles and at least one baffle is are provided symmetrically at each of the side and the opposite side of the housing about the inlet pipe; and a sound-absorbing material provided in the housing to fill the interior space of the housing except for the remaining space where the inlet pipe and the outlet pipe are provided, wherein a side of the inlet pipe and opposite sides of the outlet pipes are connected by a ‘Y’-shaped connector pipe, wherein the outlet pipes at the side and the opposite side of the dual muffler are a plurality of pipes connected in a series.