| 摘要 |
PURPOSE:To shorten the response time for injection-valve opening, by setting the shifting route of a fuel-injection valve. CONSTITUTION:At the inside of a nozzle holder 6, a nozzle 7, a valve seat 8 and a guide member 9 are held in sealing action so as to cause a spray hole 7a of the nozzle 7 and a cone-shaped part 8a and a guide part bore 9a of the valve seat to become mutually coaxial in each center axis. Since a globe valve 10 is inducted by the guide member 9, when a flat armature 11 is attracted toward a fixed core 2 or when it is brought back to the valve seat 8 by dint of a closing spring 15, the time required for shifting becomes constant at all times because of no staggering of said armature perpendicularly in the shifting direction. In addition, a delivery of magnetic flux between the fixed core 2 and the armature 11 is parallel with the shifting direction so that useless magnetic flux for magnetic attraction is almost nothing whereby sizable magnetic attraction can be obtained and consequently the time required for injection-valve opening is shortened. |
