Patent ID: 6941751
Filing Date: 2005-09-13
Classification: F01N

Abstract:
1. An exhaust muffler for use with an internal combustion engine, said exhaust muffler comprising: a hollow main body having a plurality of bulkheads therein, said bulkheads dividing the interior of said main body into a plurality of expansion chambers; said main body being connectable to an exhaust pipe of an internal combustion engine; a plurality of communicating pipes fixed in said main body so as to connect the expansion chambers; and a spark arrester which is removably attachable to said main body and which comprises a tail pipe; wherein said muffler is configured such that when the spark arrester is attached to said main body, exhaust flow is made to pass through at least one bulkhead three times by the spark arrester installed so as to connect the expansion chambers and by the plurality of communicating pipes fixed so as to connect the expansion chambers, and when the spark arrester is removed, exhaust flow may pass through the communicating pipes and may bypass one of the plurality of expansion chambers so as to be released to the outside.