Patent ID: 7721713
Filing Date: 2010-05-25
Classification: F02M

Abstract:
1. An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member; the electromagnetic drive mechanism comprising an anchor facing an axial end face of the stationary core to reciprocatingly cooperate with the stationary core; the anchor is at a center thereof provided with a through-hole into which the movable member is inserted for a relative displacement; the movable member comprises an engagement portion that engages with an axial engagement surface of the anchor on a side of the stationary core around the through-hole; and a maximum outside diameter of a portion of the movable member between the engagement portion and the valve element is smaller than a minimum inside diameter of the through-hole of the anchor.