Exhaust system spring with torsional damping
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United States of America Patent
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May 26, 2020
Grant Date -
Mar 16, 2017
app pub date -
Mar 14, 2014
filing date -
Mar 14, 2014
priority date (Note) -
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Abstract
An adaptive valve assembly includes a pipe defining a passageway for conducting engine exhaust gases, a pivot shaft supported by the pipe, and a valve body coupled to the pivot shaft. The valve body is moveable between an open position where exhaust gas flow through the passageway is increased and a closed position where exhaust gas flow through the passageway is reduced. A spring biases the valve body toward the closed position. The spring includes a plurality of coils that have torsional displacement relative to each other as the valve body moves between the open and closed positions. A torsional damper feature is associated with at least one coil of the plurality of coils to provide torsional spring damping.
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