VALVE ELEMENT MECHANISM FOR EXHAUST GAS CIRCULATION VALVE

摘要

A valve element mechanism for an exhaust gas circulation valve has primary eccentricity (A) for separating the center (0) of a support shaft (4) from the centerline (P) of a seal surface (2b) of a valve seat (2a) with which a valve element (5) comes into contact, the support shaft (4) being rotatably disposed on a housing (2), the valve element (5) being rotated by the support shaft (4) to open and close a fluid passage; secondary eccentricity (B) for separating the center (0) of the support shaft (4) from the centerline (Q) of the housing (2); and tertiary eccentricity (C) for positioning the apex (G) of a circular cone (6) to the opposite side of the support shaft (4) and tilting the apex relative to the centerline of the housing (2), the circular cone (6) forming a seal surface (5a) of the valve element (5) and the seal surface (2b) of the valve seat (2a).