Performance responsive muffler for internal combustion engines

Details Performance responsive muffler for internal combustion engines Performance responsive muffler for internal combustion engines

1988-10-18

1990-02-27

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Divider, collector, valve means, or boundary layer device...

181236, 181237, 181254, 181277, 181278, F01N 300

Patent

active

049034863

ABSTRACT:
A muffler responsive to exhaust flow rate is provided for an internal combustion engine. The muffler includes a body having a variable restrictor located downstream from an inlet port and upstream from an outlet port of the muffler. The variable restrictor includes a valving element with an operative position which varies as a function of engine exhaust flow rate to occlude exhaust gas flow. The variable restrictor is formed with a solid wall disposed about the valving element to define a constricting annular passageway having a cross section that varies with distance from the inlet port and from the outlet port. The passageway cross section for some mufflers will increase in a direction proceeding from the inlet port toward the outlet port, and will decrease proceeding in that same direction in other mufflers, depending upon the type of internal combustion engine employed.

REFERENCES:
patent: 733330 (1903-07-01), New
patent: 1163128 (1915-12-01), Brauer
patent: 3346071 (1967-10-01), Lader
patent: 3969895 (1976-07-01), Krizman
patent: 4161996 (1979-07-01), Dolejsi
patent: 4699244 (1987-10-01), Bergquist

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