NVH soundtube having integrated hydrocarbon adsorption and air filtration device to control evaporative emissions
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United States of America Patent
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Jul 28, 2020
Grant Date -
Feb 28, 2019
app pub date -
Aug 29, 2017
filing date -
Aug 29, 2017
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Abstract
An integrated hydrocarbon trap and air filter in the soundtube of a vehicle for use in conjunction with the engine's air intake system is disclosed. The trap and air filter comprises a housing body having first and second ends. The housing includes hydrocarbon-adsorbing media and air filter media. The hydrocarbon-adsorbing and air filter trap are incorporated into a soundtube. A first soundtube portion connects the housing to the engine's air intake system while a second soundtube is open to ambient and connects the housing to a vehicle body structure such as a fender. Selection of the body diameter, thickness, and length, the dimensions and type of both air filter media and hydrocarbon-adsorbing media and position of the air filter media, NVH media, and space relative to the trap media and location of the integrated hydrocarbon trap and air filter along the soundtube provide superior tunability and adaptability.
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