ENGINE AIR-INTAKE- CONTROLLER

摘要

PROBLEM TO BE SOLVED: To provide an engine air-intake controller capable of greatly reducing power which switches valve plates and holds them at preset switching positions and increasing the rigidity of the valve plates. SOLUTION: In the engine air-intake controller, the valve plate 15 comprises first and second valve half plates 15a and 15b disposed in a butterfly manner and extending oppositely from the valve shaft 14. The valve plate 15 is curved along curves of first and second air-intake paths 4 and 5 and a rib 28 extending in the intake flow direction is protruded on the concave second plate surface F2 of the valve plate 15 so that the first plate surface F1 of the valve plate 15 forms a part of the long air-intake path 4 in the first switching position A of the valve plate 15 and the second plate surface F2 of the valve plate 15 forms a part of the short air-intake path 5 in the second switching position B of the valve plate 15. COPYRIGHT: (C)2009,JPO&INPIT