| 摘要 |
An air intake device for an internal combustion engine wherein a throttle valve (22) and an air intake distribution valve (61) are provided in an air intake passage (P). The air intake passage is separated into an upper air intake passage (Up) and a lower air intake passage (Lp) by means of a partition plate (60) downstream from the air intake distribution valve (61). The air intake distribution valve (61) is pivotally mounted at a position (61a) near the upstream edge of the partition plate (60) and extends in the upstream direction. The rocking of the distribution valve (61) divides the intake air downstream from the air intake distribution valve into an upper flow and a lower flow and thus changes the ratio of the intake air flowing in the upper air intake passage (Up) and the lower air intake passage (Lp). The amounts of intake air flowing in the upper and lower passages can be allocated selectively and appropriately in response to the load state, and the strength of the eddy flow of the tumble can be adjusted, thereby achieving optimal combustion efficiency. |
