| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake air flow control device where a throttle valve and a tumble valve are provided in parallel in an intake duct of a throttle body, capable of accurately opening the tumble valve in an interlocked manner with an operation for opening the throttle valve without mechanically interlocking and coupling a throttle lever to a tumble lever by a link mechanism having a complicated structure.SOLUTION: A interlock mechanism M between a throttle valve V1 and a tumble valve V2 comprises: a drive section D integrally rotating with a throttle lever L1; and a driven section F connectable/separable to/from the drive section D and integrally rotating with a tumble lever L2, the drive section D starts to contact the driven section F on one side of a virtual plane f including rotational axes of the two valves V1 and V2 in the middle of rotation of the throttle valve V1 in a valve opening process in which the throttle valve V1 rotates from a closed position thereof in a valve opening direction, and the driven section F is pressed by the drive section D by the contact, whereby the tumble valve V2 rotates from a closed position in a valve opening direction.SELECTED DRAWING: Figure 1 |
