Patent ID: 8216349
Filing Date: 2012-07-10
Classification: B01D,F02M

Abstract:
1. An evaporative emissions filter for an engine air induction system having an air filter housing and an air inlet flow path, the evaporative emissions filter comprising: a hydrocarbon vapor-adsorbent member disposed within the air induction system substantially outside of the air inlet flow path, wherein the vapor-adsorbent member includes: a first layer of a flexible polymeric material having an outer surface; a second layer of a flexible polymeric material spaced from the first layer to form an area between the first and second layers, the second layer having an outer surface; a plurality of fasteners located at predetermined areas across the first and second layer outer surfaces, the plurality of fasteners extending from the outer surface of the first layer to the outer surface of the second layer, wherein the plurality of fasteners subdivides the area into a plurality of partially enclosed chambers; a predetermined amount of adsorptive media disposed within each of the plurality of partially enclosed chambers, the plurality of partially enclosed chambers adapted to substantially evenly distribute the adsorptive media throughout the filter; and wherein each of the first and second layer polymeric materials includes pores that are permeable to hydrocarbon vapor, and wherein each of the first and second layer polymeric materials pores are substantially impermeable to the adsorptive media; and coupling members for mounting the evaporative emissions filter within the air induction system; wherein hydrocarbon vapors present in the air induction system after engine shut-down are substantially retained in the adsorbent member until air flows through the air induction system after the engine starts.