| 摘要 |
<p>A seal structure of a bypass intake volume control device, comprising a bypass (30) bypassing a throttle valve (21) connected to the intake passage (17a) of a throttle body (17) and an actuator (39) for operating a bypass valve (35) connected to the bypass valve for opening and closing the bypass (30), wherein an annular seal member (57) closely fitted to the root part outer peripheral surface of the output shaft (39a) of the actuator (39) while holding airtightness therebetween is disposed between a valve hole (34) allowing the bypass valve (35) to be fitted movably in the axial direction and an actuator housing (42) allowing the actuator (39) to be fitted therein, whereby, regardless of the structure and type of the bypass valve, a clearance between the actuator and the bypass can be surely sealed with a single seal member, and the frictional resistance of the seal part can also be reduced to increase the responsiveness of the bypass valve.</p> |
