| 摘要 |
To improve an air bypass device in bypass air flow and designing freedom, a locking stepped part 3, a bush inserting hole 4, and a valve body drive mechanism inserting hole 5 are provided above an upper end 2 a of a valve body guiding hole 2 of an air control valve main body 1, an air flow-in hole 6 is provided below a lower end 2 b of the valve body guiding hole 2, and an inner peripheral wall 2 c of the valve body guiding hole 2 includes a plurality of air control grooves 7 a extending downwardly from the locking stepped part 3 and being closed by an annular bush 11 on the locking stepped part 3 to form independent air distribution chambers 12 a . . . , which are connected to intake passages 8 b 1 . . . at the downstream side from the respective throttle valves of multiple throttle bodies T 1 . . . through bypass air passages 15 a . . . .
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