Patent ID: 7311088

Claim:
An emission control module coupled to a fuel reservoir, the emission control module having a fuel inlet and a fuel outlet defining a center fuel flow axis therewithin, the fuel reservoir having a vapor region having a quantity of fuel vapor extending above a quantity of fuel, the emission control module comprising: a housing comprising; at least one atmospheric air opening; a base including at least one vapor emission inlet for communication with the vapor region of the fuel reservoir; and a hydrocarbon filter disposed between said at least one atmospheric air opening and said at least one vapor emission inlet to passively filter vapor emissions from the vapor region; said housing configured for purging the quantity of fuel vapor from said hydrocarbon filter due to a low pressure draw from said at least one vapor emission inlet; wherein said housing comprises a non-linear hydrocarbon filter purge path for air and the quantity of fuel vapor to flow from said at least one atmospheric air opening, across said hydrocarbon filter, and through said at least one vapor emission inlet; wherein said non-linear hydrocarbon filter purge path flows in a direction through said hydrocarbon filter that is not parallel to the center fuel flow axis along a majority of its length from said at least one atmospheric air opening to said at least one vapor emission inlet.