초록 ▼

A muffler for internal combustion engines in which the structure cancels sound waves by interference. The gases generally flow in one direction through the muffler with intermittant flow reversal occurring only upon acceleration. The muffler is formed with a plurality of longitudinal chambers divide

A muffler for internal combustion engines in which the structure cancels sound waves by interference. The gases generally flow in one direction through the muffler with intermittant flow reversal occurring only upon acceleration. The muffler is formed with a plurality of longitudinal chambers divided by reflection walls. Edge echo openings in the reflection walls permit limited gas entry into the chambers. A plurality of helical members surrounded by a large open tube and pierced by a small open tube channel all of the gases through a bulkhead wall which divides the muffler housing into two volumetrically generally equal portions.

대표청구항 ▼

An internal combustion engine muffler comprising: a. an elongated housing having a curvilinear side wall, an inlet end wall formd with a first inlet opening, and an outlet end wall formed with a first outlet opening; b. an inlet tube connected to said inlet end wall and communicating with said first

An internal combustion engine muffler comprising: a. an elongated housing having a curvilinear side wall, an inlet end wall formd with a first inlet opening, and an outlet end wall formed with a first outlet opening; b. an inlet tube connected to said inlet end wall and communicating with said first inlet opening in said inlet end wall; c. an outlet tube connected to said outlet end wall and communicating with said first outlet opening in said outlet end wall; d. a first internal reflection wall axially spaced downstream from said inlet end wall forming a close fit with said curvilinear side wall and formed with a first edge echo opening therethrough and first and second large tube openings; e. a second internal reflection wall spaced between said inlet end wall and said first internal reflection wall forming a close fit with said curvilinear side wall and formed with a second edge echo opening therethrough and a second inlet tube opening; f. said inlet tube communicates with said second inlet tube opening in said second internal reflection wall and is connected to said second internal reflection wall; g. a bulkhead wall axially spaced downstream from said first internal reflection wall forming a close fit with said curvilinear side wall and formed with third and fourth large tube openings axially aligned with said first and second large tube openings in said first internal reflection wall; h. first and second elongated internal large tube members connected to and extending from said first internal reflection wall to said bulkhead wall and communicating with said large tube openings in said first internal reflection wall and said bulkhead, and connected to said bulkhead wall; i. first and second inner small tube members coaxially mounted within said first and second large tubes forming first and second open ended pulse chambers; j. first and second elongated helical members joining said first and second inner small tubes and said first and second internal large tube members; k. a third internal reflection wall axially spaced downstream from said bulkhead wall forming a close fit with said curvilinear side wall and formed with a third edge echo opening therethrough and a second outlet tube opening formed in alignment with said first outlet opening in said outlet end wall; l. said outlet tube is in communication with said second outlet tube opening in said third internal reflection wall, and is connected to said third internal reflection wall; m. a primary expansion chamber formed by said curvilinear side wall, said second internal reflection wall and said first internal reflection wall; n. a primary acceleration expansion chamber formed by said curvilinear side wall, said first internal reflection wall and said bulkhead wall; o. first and second elongated swirl and pulse smooting chambers formed between said first and second inner small tubes and said internal large tubes and divided by said helical members; p. a primary interference chamber formed by said curvilinear side wall, said bulkhead wall and said third internal reflection wall; q. a second acceleration expansion chamber formed by said curvilinear side wall, said inlet end wall, and said second internal reflection wall; and r. a third acceleration expansion chamber formed by said curvilinear side wall, said third internal reflection wall and said outlet end wall.