| 摘要 |
PURPOSE: A governor of a fuel injection apparatus is provided to improve precision degree of control by operating feedback control via an actuator and a sensor, to satisfy performance needed by an engine by making possible complete free control, and to keep injection control function for a long period of time by preventing degradation of components due to long time use. CONSTITUTION: In a fuel injection apparatus controlling injection flow through operation of a control rack(3), an actuator(5) consisting of a cylindrical mobile core(8) with an electronic coil(9) and a permanent magnet(7) between the electronic coil and a cylindrical yoke(6) is installed in a pump housing(1). In a contact face of the pump housing and the yoke, such a sealing member(10) as an O ring or a gasket is installed to prevent invasion of impurities into the actuator. The direction of currents applied to the electronic coil of the mobile core is periodically and continuously switched by an actuator driving circuit, and the mobile core moves to the left and right by the action of the electromagnetic force generated from the permanent magnet and the mobile core.
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