To provide a flow passage control valve device free from stress concentration and rattling and dispensing with too much consideration of dimensional accuracy.
The flow passage control valve device has a rotary shaft 16 formed in an almost uniform quadrangular cross section shape and a valve body 14 for opening and closing a intake air branch passage 12 in conjunction with rotation of the rotary shaft 16. A fitting part 46 (46B) of the valve body 14, where the rotary shaft extends through and is fitted, is formed with three protrusions which project inward from an inner surface of the fitting part 46 so as to approach the rotary shaft 16. The fitting part 46 (46A) is formed with a plurality of flat surface portions in accordance with a contour shape of the rotary shaft 16 and a curved surface portion is formed at a corner between adjacent flat surface portions, which is concave to be more apart from the rotary shaft 16 than the flat surface portions and is smoothly curved.
| JP6354577 | Valve device |
| JP5690666 | V-type engine intake control device |
| WO/2007/113185 | INTAKE PIPE FOR AN INTERNAL COMBUSTION ENGINE |
KITABAYASHI SHINSUKE
| JP2001234760A | 2001-08-31 | |||
| JP2002106370A | 2002-04-10 | |||
| JP2004044501A | 2004-02-12 | |||
| JPH0814408A | 1996-01-16 | |||
| JP2003227330A | 2003-08-15 | |||
| JP2004011699A | 2004-01-15 | |||
| JP2004186366A | 2004-07-02 |
Hiromichi Kobayashi
Tomioka Kiyoshi
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