Patent ID: 6138640
Filing Date: 2000-10-31
Classification: F02D

Abstract:
An intake control valve device for an internal combustion engine, comprising a butterfly-type valve provided in an intake passage in a body, wherein a valve seat surface, which can face an outer peripheral portion of an upstream-side surface of said valve at one half-periphery portion of said valve, disposed on one side of a valve shaft, is formed on said body, and another valve seat surface, which can face an outer peripheral portion of a downstream-side surface of said valve at another half-periphery portion of said valve, disposed on another side of said valve shaft, is formed on said body;wherein an angle of inclination of each of said two valve seat surfaces is larger than an angle of inclination of said valve in its fully-closed condition, and opposite ends of each of said two valve seat surfaces are spaced from said valve and said valve shaft.