FUEL VAPOR ADSORPTION FILTER FOR INTERNAL COMBUSTION ENGINE AND INTAKE DUCT STRUCTURE FOR INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Apr 27, 2017
app pub date -
Oct 13, 2016
filing date -
Oct 21, 2015
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Abstract
An intake duct structure for an internal combustion engine includes an intake duct and an adsorption filter. The intake duct has an extendable-contractible portion, which is extendable and contractible in an axial direction, and the adsorption filter is arranged on the inner wall surface of the extendable-contractible portion. The adsorption filter includes an adsorption sheet. The adsorption sheet includes an adsorbent that adsorbs fuel vapor and a folding structure that is extendable and contractible in the axial direction.
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