초록 ▼

An exhaust muffler (20) for an internal combustion engine (25) includes a tapered tube (28) and an outer tube (40) axially aligned with and surrounding the tapered tube (28) so that an annular passage (42) is formed between the tapered tube (28) and the outer tube (40). The tapered tube (28) has an

An exhaust muffler (20) for an internal combustion engine (25) includes a tapered tube (28) and an outer tube (40) axially aligned with and surrounding the tapered tube (28) so that an annular passage (42) is formed between the tapered tube (28) and the outer tube (40). The tapered tube (28) has an exhaust inlet end (30) for receiving exhaust gases (76) from the engine (25) and an exhaust outlet end (34). The outer tube (40) has an air inlet end (50) for receiving air (49) external to the engine and an air outlet end (52). The external air (49) flows in the annular passage (42) toward the air outlet end (52). The flow of the external air (49) creates a low pressure region (54) downstream of the exhaust outlet end (34) to accelerate the receipt of exhaust gases (76) from the engine, and elliptical holes (62) in the tapered tube (28) allow the smooth flow of exhaust gases (76) from tapered tube (28) to mix with the external air (49) to achieve effective noise attenuation.

대표청구항 ▼

[ What is claimed is:] [1.]1. An exhaust muffler for an internal combustion engine comprising:a tapered tube having an exhaust inlet end exhibiting a first diameter and an exhaust outlet end exhibiting a second diameter, said second diameter being less than said first diameter, and said exhaust inle

[ What is claimed is:] [1.]1. An exhaust muffler for an internal combustion engine comprising:a tapered tube having an exhaust inlet end exhibiting a first diameter and an exhaust outlet end exhibiting a second diameter, said second diameter being less than said first diameter, and said exhaust inlet end being configured to receive exhaust gases from said engine; andan outer tube axially aligned with and surrounding said tapered tube to form an annular passage between said tapered tube and said outer tube, said outer tube having an air inlet end and an air outlet end, said air inlet end being configured to receive air external to said engine to create a flow of said external air in said annular passage toward said air outlet end for accelerating the receipt of exhaust gases from said engine.