Patent ID: 6241044
Filing Date: 2001-06-05
Classification: F01N

Abstract:
An exhaust silencer to be connected to an outlet pipe of an internal combustion engine, comprising:a plurality of damping chambers of more than two, the plurality of damping chambers having an uppermost-stream damping chamber having an exhaust gas inlet for directly introducing exhaust gas of the internal combustion engine, and lowermost-stream damping chamber having an exhaust gas outlet for discharging the exhaust gas; anda communicating pipe for intercommunicating predetermined space of the plurality of damping chambers, the communicating pipe having an end plate on both ends and a number of communicating holes on an outer circumference at a predetermined position corresponding to the damping chamber to be intercommunicated, wherein a total opening area of the communicating holes on the communicating pipe open to the uppermost-stream damping chamber is smaller than respective total opening area of the communicating holes open to lower-stream damping chamber.