| 摘要 |
PURPOSE:To prevent an opening and closing valve from biting at the wall surface of a high speed use intake port when the valve receives an influence of its thermal expansion in high speed operation, by slidably mounting the opening and closing valve in the axial direction of a rotary shaft which controls the opening and closing valve in at least two cylinders to be simultaneously opened and closed. CONSTITUTION:A plane part 23 is formed in one portion of a rotary shaft 22, which controls an opening and closing valve 21 contained in a housing of at least two cylinders to be simultaneously opened and closed, and this plane part 23 mounts the opening and closing valve 21 of butterfly type by screws 27 through a spacer 24 having a cylindrical part 25 and a flange part 26. And the opening and closing valve 21, providing in two symmetrical positions long holes 28 from the peripheral surface toward the center, forms their width a little larger than the external diameter of the cylindrical part 25 in the spacer 24. While the opening and closing valve 21 forms its thickness slightly thinner than the length of the cylindrical part 25, further the plane part 23 of the rotary shaft 22 forms its length larger than the external diameter of the opening and closing valve 21. In this way, the opening and closing valve 21, being slidably mounted in the axial direction of the rotary shaft 22, attains the desired end. |
