To provide an electromagnetic fuel injection valve in which weight reduction of a movable core is achieved while sufficiently securing an effective area of a magnetic path in the movable core, and thus opening/closing responsiveness of a valve body can be improved.
In an electromagnetic fuel injection valve which includes a movable core 12 housed axially movably in a magnetic cylinder body 4 and opposed to an annular attraction surface 5a at a front end of a fixed core 5, and a valve body 14 connected to the movable core 12 to open/close a valve hole 7, and which opens the valve body 14 by magnetic attractive force produced between the fixed core 5 and the movable core 12 due to energization of a coil 30, the movable core 12 has an annular magnetic path forming part 12a opposed to the attraction surface 5a of the fixed core 5 and an inner circumferential surface of the magnetic cylinder body 4, and a front surface of the magnetic path forming part 12a is formed in a concave surface 18 in a funnel shape enlarged diametrically toward the front.
TAKASE NOBUFUMI
YASUDA TAKAHIRO
MIYASHITA JUNICHI
| JP2006097659A | 2006-04-13 | |||
| JP2004285922A | 2004-10-14 | |||
| JPH11132127A | 1999-05-18 | |||
| JP2002531750A | 2002-09-24 |
| EP2336544A1 | 2011-06-22 |
Kazuaki Niki
Nude Shima Shinji