Abstract: In one aspect of the present invention, a hydrocarbon trapping device is provided, including a conduit and an adsorbing element positioned within the conduit. The conduit includes a wall having a wall thickness and the adsorbing element has an adsorbing element thickness that is generally equal to or less than the wall thickness. Furthermore, the adsorbing element defines a leading edge, a trailing edge, and a flow path extending between the leading and trailing edges in a direction substantially parallel to a longitudinal axis of the conduit.

Abstract: A hydrocarbon trapping device including an adsorbing element of a material configured to adsorb hydrocarbons from the air and a support connected to the adsorbing element is provided. The adsorbing element includes first and second opposing ends, and the support includes an embedded portion located within the adsorbing element between the first and second ends to reinforce the adsorbing element.

Abstract: An air cleaner for a vehicular engine includes a pre-filter which receives air flow containing particulates and a primary filter which receives the air from the pre-filter. The pre-filter removes a first proportion of particulates from the air, and the primary filter removes a second proportion of particulates from the air. The pre-filter is separately serviceable from the primary filter.