Air intake apparatus

An air intake apparatus comprising:

• a plurality of air intake ports;
• a plurality of valve bodies arranged in the plurality of air intake ports, rotated between their open positions and their closed positions;
• a rotating shaft that is inserted into a shaft insertion portion provided in each of the plurality of valve bodies, is fixed into the shaft insertion portion so as not to be torsionally deformable, and rotates together with the plurality of valve bodies;
• and
• a common drive source that is connected to the rotating shaft and rotationally drives the plurality of valve bodies, wherein
• the plurality of respective air intake ports include sealing surfaces that include inner wall surfaces with which the valve bodies come into contact at the closed positions of the valve bodies,
• rotation angles of the valve bodies located on a side relatively close to the drive source from their open positions to their closed positions are larger than the rotation angles of the valve bodies located on a side relatively opposite to the drive source when the plurality of valve bodies are rotated from their open positions to their closed positions,
• there are three or more of the air intake ports and three or more of the valve bodies,
• of at least two of the three or more valve bodies, the rotation angle of the valve body located on the side relatively close to the drive source is larger than the rotation angle of the valve body located on the side relatively opposite to the drive source,
• the rotation angles of the plurality of valve bodies from their open positions to their closed positions are increased in order from the valve body farthest from the drive source to the valve body closest to the drive source such that the valve bodies come into contact with the corresponding sealing surfaces in order from the valve body farthest from the drive source to the valve body closest to the drive source,
• the rotation angles of the plurality of valve bodies from their open positions to their closed positions are increased in order from the valve body farthest from the drive source to the valve body closest to the drive source, and angular intervals are increased in order from the valve body farthest from the drive source to the valve body closest to the drive source,
• increased inner diameter portions provided on both ends of the shaft insertion portion and each of the increased inner diameter portions having an inner diameter so as not to come into contact with the rotating shaft in a state where the rotating shaft is inserted into the shaft insertion portion, and
• wherein the rotating shaft is configured to be torsionally deformable between the increased inner diameter portions that face each other between the plurality of valve bodies adjacent to each other when the plurality of valve bodies come into contact with the corresponding sealing surfaces.