| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable a continuous control of opening degree for forming a drift optimal for all opening rates in an internal combustion engine having a common intake port with an oblong ellipse cross-sectional shape. <P>SOLUTION: A flow control valve 6 having right and left spindles 61 is provided in a substantially central position in the vertical direction of an air intake path 51. The flow control valve 6 comprises a top end part 69 having a cross-sectional shape according to the inner circumferential wall in the lower half of the intake path 51, and a notch 60. The top end part 69 is rotated from the position contacted with a bottom inner wall of the intake path 51 to the vicinity of a ceiling wall 55 of the intake path 51 in the intake path 51. Thus, a strong tumble flow is formed certainly in the combustion chamber in a wide range of operation conditions. <P>COPYRIGHT: (C)2012,JPO&INPIT |
