Modular muffler

Abstract

An exhaust gas muffler for an engine, the exhaust gas muffler having: a body, at least one inlet for the exhaust gas from the engine on the body, a chamber in the body to receive exhaust gas from the at least one exhaust gas inlet and to reduce a sound of the exhaust gas, and at least one exhaust gas outlet from the chamber to vent the exhaust gas from the chamber, the exhaust gas outlet being sized and shaped to receive a sound reducing element from outside of the muffler, wherein, by attaching a sound reducing element to the muffler, the muffler can reduce the sound of the exhaust gas to a predetermined level.

1 . An exhaust gas muffler for an engine, said exhaust gas muffler having a body; at least one inlet for said exhaust gas from said engine on said body; a chamber in said body to receive exhaust gas from said at least one exhaust gas inlet and to reduce a sound of said exhaust gas; and at least one exhaust gas outlet from the chamber to vent said exhaust gas from said chamber, said exhaust gas outlet being sized and shaped to receive a sound reducing element from outside of said muffler; wherein, by attaching a sound reducing element to said muffler, said muffler can reduce said sound of said exhaust gas to a predetermined level.  
   
   
       2 . The exhaust gas muffler according to  claim 1 , further including a sound reducing element attached to said exhaust gas outlet, to further reduce said sound of said exhaust gas.  
   
   
       3 . The exhaust gas muffler according to  claim 2 , wherein said exhaust gas outlet is a first conduit having a diameter, and said sound reducing element is a second conduit having a diameter less than said diameter of said first conduit.  
   
   
       4 . The exhaust gas muffler according to  claim 2 , wherein at least one of said exhaust gas outlet and said sound reducing element includes an attachment means to secure said sound reducing element to said exhaust gas outlet.  
   
   
       5 . The exhaust gas muffler according to  claim 2 , wherein at least one of said exhaust gas outlet and said sound reducing element includes a dampening material to increase the sound absorption capacity of said muffler.  
   
   
       6 . A sound reducing element for an engine exhaust gas muffler, said sound reducing element having a body, said body being sized and shaped to fit inside an exhaust gas outlet of said muffler, said body having sound reduction properties; and an attachment means to secure said body to said exhaust gas outlet.  
   
   
       7 . A method of increasing the sound absorption capacity of an exhaust gas muffler, said method comprising providing a sound reducing element sized and shaped to attach to an exhaust gas outlet of said muffler; inserting said sound reducing element inside said exhaust gas outlet; and securing said sound reducing element to said exhaust gas outlet.