| 摘要 |
In an electromagnetic fuel injection valve in which a non-magnetic cylinder is coaxially coupled at its front end to a rear end of a magnetic cylinder forming a portion of a valve housing to surround a portion of a movable core having a rear end face serving as a movable attraction face, and a stationary core having a front end face serving as a stationary attraction face is fitted and fixed at its front portion in a rear portion of the non-magnetic cylinder, so that the stationary attraction face is opposed to the movable attraction face, the stationary core ( 22 ) is fitted and fixed at its front portion in the non-magnetic cylinder ( 26 ), so that it is in close contact with an inner surface of an intermediate portion of the non-magnetic cylinder ( 26 ) in a region corresponding to the stationary attraction face ( 42 ), and an annular recess ( 44 ) having a flat portion ( 44 a) flush connected to the stationary attraction face ( 42 ) is provided in an inner surface of the non-magnetic cylinder ( 26 ) to form an annular chamber ( 45 ) between the annular recess ( 44 ) and an outer periphery of a rear portion of the movable core ( 18 ). This makes it possible that the area of opposed faces of the stationary core and the movable core is set at a large value to the utmost, thereby preventing the accumulation and deposition of chips and a magnetic powder.
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