Exhaust gas muffler for an internal combustion engine

Details Exhaust gas muffler for an internal combustion engine Exhaust gas muffler for an internal combustion engine

1989-01-26

1994-05-24

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181230, 181239, 181264, 181282, F01N 106

Patent

active

053150759

ABSTRACT:
The invention is directed to an exhaust gas muffler for an internal combustion engine such as a two-stroke engine for portable handheld tools such as a motor-driven chain saw. The engine includes a cylinder and a piston conjointly defining a combustion chamber wherein combustion gases are generated and discharged as a flow of exhaust gas during operation of the engine. The exhaust gas muffler includes a housing having a shell-like wall defining a chamber for receiving the exhaust gas from the engine. The housing has a primary outlet opening formed in the wall of the housing for passing a primary component flow of the exhaust gas out of the chamber in a first direction. The housing has a secondary outlet opening formed in the wall thereof for passing a secondary component flow of the exhaust gas out of the chamber in a second direction. A guide is provided at the secondary outlet opening for directing the secondary component flow toward and into the primary component flow to break up the latter and cause the same to become turbulent and mix with the cooler ambient air.

REFERENCES:
patent: 2975854 (1961-03-01), Bakke et al.
patent: 3404749 (1968-10-01), Miller et al.
patent: 3798769 (1974-03-01), Bailey
patent: 4142607 (1979-03-01), Lundwehr et al.
patent: 4231321 (1980-11-01), Mathner et al.
patent: 4370855 (1983-01-01), Tuggle

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