| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide the high inertial supercharging effect, regardless of an operation state of a tumble control valve. <P>SOLUTION: This intake control device has a first intake passage 5, a second intake passage 8, an intake passage length changing valve 11, a partition wall 14 forming two divided intake passages 12 and 13, and the tumble control valve 17. When closing one of the divided intake passages by the tumble control valve, air flowing in a combustion chamber via the other divided intake passage, forms a tumble flow. The length of the second intake passage is formed longer than the length up to a connecting place S of the second intake passage and the first intake passage from a surge tank. The passage cross-sectional area of the second intake passage is formed smaller than the passage cross-sectional area of the first intake passage up to the connecting place of the second intake passage and the first intake passage from the surge tank. The tumble control valve is installed on the partition wall so as to rotate around a rotary shaft installed on the partition wall. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
