| 摘要 |
PURPOSE:To make driving torque of a valve stem small, by decenfering, the center of the intermediate shaft hole of an intake barrel wall which allows passing of the valve stem with the throttle valves of multiple intake barrels mounted thereon, toward the side where negative pressure is applied to the axial center of a valve stem. CONSTITUTION:Throttle valve 5a, 5b are installed inside the intake barrel 3a, 3b; respectively, and the throttle valve 5a, 5b are fastened to one valve stem 7, passing through a intermediate shaft hole 6 which are installed inside manifolded intake air 4. And the center of the intermediate shaft hole 6 is provided eccentrically on the intake manifold 2 side, from the center of valve stem 7. Therefore, even if the valve stem 7 is bent toward the intake-manifold 2 side by the negative pressure in an intake barrel, it is possible to reduce the torque of a return spring 10, by preventing the contact of the valve stem 7 with the intermediate shaft hole 6.
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