Emission control devices for air intake systems

Abstract

An emission control device for air intake system includes an extending conduit (400) and an adsorbing element (300) disposed about the conduit, wherein the adsorbing element comprises a substrate and an adsorbent material disposed substantially throughout the substrate. When the conduit includes an indentation portion (403) and an opening (404) located about the indentation portion, the adsorbing element may be disposed on at least a portion of the indention to cover at least a portion of the opening, and the closure element (105) may be used to secure the adsorbing element to the indentation portion. The air intake tube of the air intake system may be designed to include an indentation portion and an opening located about the indentation portion such that an adsorbent sheet with adsorbent material disposed substantially therethrough may wrap around at least a portion of the indentation and cover at least a portion of the opening.

Description

BACKGROUND OF THE DISCLOSURE[0001]An increase in environmental concerns has continued to drive strict regulations of the hydrocarbon emissions from automotives into the environment, even when the vehicle is not operating. The great majority of internal combustion engines in use today are fuel-injected engines. When a fuel-injected engine is switched off after use, a small amount of residual fuel volatilizes and escapes from the injector tips. While a vehicle is sitting over time after use, this evaporated fuel may pass outwardly through the intake manifold, the intake air ducts and air filter, and may escape into an atmosphere contributing to air pollution. Therefore, it would be desirable to minimize this type of inadvertent evaporative emissions leakage.[0002]One approach to abate the hydrocarbon emissions from the intake manifold after an engine shutdown is to use an air intake filter-like device having a hydrocarbon adsorbing., element, One drawback of these air intake emission ...

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