초록 ▼

A muffler assembly includes an inner outlet tube having a tubular portion, a frusto-conical portion and a flange portion having an expanded orifice facing the outlet of an inlet tube. Both the outlet tube and inlet tube extend within a chamber defined in an outer housing. The chamber is divided into

A muffler assembly includes an inner outlet tube having a tubular portion, a frusto-conical portion and a flange portion having an expanded orifice facing the outlet of an inlet tube. Both the outlet tube and inlet tube extend within a chamber defined in an outer housing. The chamber is divided into two or more subchambers by a baffle which extends between the outlet tube and the housing. One or more holes in the baffle improve the sound attenuation characteristics of the muffler. The invention also comprehends a novel blank used in forming the outlet tube, and three alternative methods which may be used to form the outlet tube.

대표청구항 ▼

A muffler assembly for use with an internal combustion engine, comprising: an elongate outer housing having first and second ends and an interior chamber defined therein; inlet tube means having a first end adapted for receiving exhaust gases from an engine, said inlet tube means mounted at said fir

A muffler assembly for use with an internal combustion engine, comprising: an elongate outer housing having first and second ends and an interior chamber defined therein; inlet tube means having a first end adapted for receiving exhaust gases from an engine, said inlet tube means mounted at said first end of said housing and including a second end partially extending into said interior chamber; outlet tube means having a first end for receiving exhaust gases from said inlet tube means and a second end, said outlet tube means being mounted at said second end of said housing so that said first end extends into said chamber, said outlet tube means having a first cylindrical section mounted to said housing, a second conical section decreasing in cross-section from said first section toward said inlet tube means and a flange section which flanges outwardly from said second section to a maximum diameter proximate to but not in contact with said inlet tube means; and baffle means sealingly disposed about said second conical section of said outlet tube means for attenuating engine noise, said baffle means having means defined therein for allowing limited gas movement therethrough, whereby a component of engine noise is efficiently attenuated.