| 摘要 |
PURPOSE:To permit high-speed operation by inserting a ring made of slidable material into the magnetic gap part formed between a magnetic iron core yoke part and a magnetic plunger which performs reciprocative movement. CONSTITUTION:In operation, a plunger 4 is attracted to a core 3 side by a magnetic attraction force. A washer 12 connected with a ball valve 6 through spot welding collides with a stopper 10, and the direct collision of the plunger 4 onto the core 3 is prevented. The plunger 4 is fixed by fitting a ring 13 made of nonmagnetic slidable alloy into the gap formed between a yoke 2 and the plunger 4 by utilizing said gap. Thus, eccentric setting of the plunger 4 is prevented, and the stability of the injection flow-rate characteristic of fuel is improved. |
