Large diesel engine exhaust muffler

Details Large diesel engine exhaust muffler Large diesel engine exhaust muffler

1984-11-06

1986-07-22

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181268, 181272, F01N 112

Patent

active

046013636

ABSTRACT:
A muffler for large internal combustion diesel 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. The chambers on either side of the tube and helical member cluster are substantially longer than the tubes joined by the helix members.

REFERENCES:
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patent: 4203503 (1980-05-01), Franco et al.
patent: 4317502 (1982-03-01), Harris et al.
patent: 4485890 (1984-12-01), Harris et al.

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