To provide a variable intake device capable of easily incorporating a switching valve into an intake passage structure and capable of smoothly operating the switching valve without affected by strain of the intake passage structure.
In the variable intake device, an actuator connected with an end part of a valve stem of the switching valve for switching an intake air quantity is fixed with a side wall of the intake passage structure and the valve stem 33 is rotatably supported by a bearing member 67 in the intake passage structure. The intake passage structure is separated into a plurality of structures and is composed of these separated structures which are welded and adhered with each other. A bearing support part 65 for loading the bearing member 67 is formed for a structure 21 of the separated structures, a bearing holder 75 for holding the bearing member 67 sandwiched between the bearing support part 65 and the bearing holder 75 in the bearing support part 65. A claw part 79 engageably and disengageably fixed to an engaging part 71 of the bearing support part 65 is integrally formed for the bearing holder 75.
Tadashi Takahashi
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama