Device for modulating the flow of the gases in an internal combu

Details Device for modulating the flow of the gases in an internal combu Device for modulating the flow of the gases in an internal combu

1982-09-24

1984-11-27

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181237, 181272, 181273, 181278, F01N 108

Patent

active

044846592

ABSTRACT:
The muffler comprises a resonator (6) which communicates by way of an outlet orifice (14) with a chamber (5). A flexible valve member (16) regulates the section of the passage through this orifice in accordance with the rate of flow of the gas through the outlet of the resonator under the action, for example, of the pressure prevailing in the resonator. When the running speed of the engine decreases, the valve member reduces the section of the passage through the orifice (16) and modifies the acoustic attenuation in the resonator. The valve member may be controlled by other parameters of the flow of the exhaust gas inside the muffler.

REFERENCES:
patent: 3090677 (1963-05-01), Scheitlin et al.
patent: 3620330 (1971-11-01), Hall
patent: 3783590 (1974-01-01), Allen

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