| 摘要 |
An air filtration system for an internal combustion engine, comprises an air filter 1 removably held in an air filter housing. The air filter has a particulate filtration portion 5 for filtering particulates from inlet air flow. The filtration portion is made from a first sheet of air filtration material folded into a pleated volume 6 that is bounded by a plurality of sides including a pair of opposite folded 8, 9 sides through which air flow passes, at least one pleated side 12, 13 that extends between the folded sides and at least one end side 10, 11 at the or each end of the series of pleats 4. The air filter also has a side sealing portion 7 along the pleated side. The sealing portion is made from a second sheet of air filtration material that covers the pleated side and projects beyond the pleated side to provide a flange 26, 27 that extends upright from a folded side along a corresponding side edge. The air filter housing has a first sealing means that engages the flange along the length of a corresponding side edge to provide a first particulate seal between the housing and the air filter; a second sealing means that engages with at least one end pleat along a corresponding end side to provide a second particulate seal between the housing and the air filter; and a third sealing means that engages the second sheet of air filtration material along a corner edge to provide a third particulate seal between the housing and the air filter, the third particulate seal extending between the first and second particulate seals. |
