A tubular channel is disposed in a path of air that flows from an inlet to a dirty side. The cross sectional area of the tubular channel is smaller than the cross-sectional area of the inlet. A dust outlet is disposed in a wall in a path of the air that flows out of the exit of the tubular channels to...http://www.google.fr/patents/US8025707?utm_source=gb-gplus-shareBrevet US8025707 - Air cleaner and engine including the same
