초록 ▼

A sound attenuating muffler useful with an internal combustion engine, preferably for marine applications, contains an insert comprising an arrangement of annular sound reflecting surfaces defining an inner chamber into which engine exhaust gases flow in a first direction and one or more directors t

A sound attenuating muffler useful with an internal combustion engine, preferably for marine applications, contains an insert comprising an arrangement of annular sound reflecting surfaces defining an inner chamber into which engine exhaust gases flow in a first direction and one or more directors to divert the axial flow of gases and sound waves in a second direction past these sound reflecting surfaces. As the sound waves are reflected off of these surfaces back into the muffler interior, attenuation of the sound is achieved. One or more additional inserts may be placed downstream from the first insert for additional sound attenuation. Each of the inserts may be in the form of discrete sound reflector rings or as a continuous helix. A method of assembling the component parts of the insert is also described.

대표청구항 ▼

A muffler useful for attenuating the sounds of combustion gases exhausted from an internal combustion engine, said muffler comprising an elongated axially extended housing, an inner chamber, an annular outer chamber radially surrounding said inner chamber, a reflector core separating said inner and

A muffler useful for attenuating the sounds of combustion gases exhausted from an internal combustion engine, said muffler comprising an elongated axially extended housing, an inner chamber, an annular outer chamber radially surrounding said inner chamber, a reflector core separating said inner and outer chambers, the inner chamber including an inlet through which exhaust gases flow into said muffler in an axial direction and at least one frusto-conical flow director for redirecting the flow of exhaust gases from said axial direction to a generally radially outward direction, said reflector core including at least one open passageway for the flow of exhaust gases radially outwardly fore the inner chamber into the outer chamber and at least one planar reflection surface extending into said open passageway at an angle whereby sound waves accompanying the exhaust gases are reflected from said one planar surface back into the inner chamber to cause attenuation of the sound waves.