Device for modulating the flow of the gases in an internal combustion engine exhaust muffler
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United States of America Patent
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-
Nov 27, 1984
Grant Date -
N/A
app pub date -
Sep 24, 1982
filing date -
Oct 14, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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