Fuel injection valve.

摘要

The fuel injection valve has a ferromagnetic valve housing containing a magnetic coil surrounding a core to which the valve armature is attached. The valve armature supports a valve needle (27) cooperating with an annular valve seat (48). The seal between the valve needle (27) and the valve seat (48) is provided by a rounded surface (90) defined by a toroid (94) with a circular or elliptical cross-section in the outer surface of the valve needle (27). Oref. the toroid (94) has an elliptical cross-section with its major axis parallel to the longitudinal axis of the valve needle (27).