Patent ID: 7080619
Filing Date: 2006-07-25
Classification: B01D,F02M

Abstract:
1. An air intake apparatus comprising: an air intake duct provided with an inlet through which intake air is introduced; an air cleaner disposed on the downstream side of the air intake duct and for filtering the intake air, the air cleaner including a casing; an air cleaner hose disposed between the downstream side of the air cleaner and the upstream side of a combustion chamber of an engine and for supplying the filtered intake air to the combustion chamber, wherein an intake air passageway, ranging from the inlet to the upstream side of the combustion chamber, is defined by walls of the air intake duct, the air cleaner, and the air cleaner hose; an air-permeable member disposed to block a communicating path disposed in a wall of the intake air passageway, wherein the wall surrounds an antinode of a lower resonance mode, the lower resonance mode corresponds to a whole length of the intake air passageway from the inlet to the upstream side of the combustion chamber, and the antinode occurs in the intake air passageway; and a valve, disposed in the wall, for opening the communicating path, to allow the inside of the intake air passageway to communicate with the outside thereof at least when the lower resonance mode occurs, wherein the valve and the air-permeable member are disposed in the casing.