The invention discloses a proportional
electromagnetic valve for an electrically controlled high-pressure common-rail
fuel injection system of a
diesel engine and relates to an
electromagnetic valve. A position at which a fixed iron core (8) and a movable iron core (3) of the
electromagnetic valve attract each other is a conical
polar plane. The fixed iron core (8), the movable iron core (3), a guide
pipe (18), a spiral spring (15), an
electromagnetic coil (4), a square iron core (19), a shell (14) and a valve body (1) jointly form the electromagnetic valve in an assembling way. When
driving current is input into the
electromagnetic coil, a
magnetic field is generated through a magnetic path in the valve, electromagnetic force with magnitude which is in proportion with the magnitude of the
driving current and is not related to a
stroke is generated relative to the movable iron core, the movable iron core is enabled to overcome
spring force to move, the movable iron core stops moving at a
balance point of the two kinds of force and therefore is kept at a stable position, and the movable iron core can proportionally and continuously move according to the magnitude of the
driving current to control the opening of the valve. Under complex working conditions under which the
diesel engine works, the electromagnetic valve not only can stably control the on / off of a fuel path, but also can accurately and proportionally control the flow of the fuel path according to the driving current.