| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid valve excellent in response of a valve member when electricity supply to a coil is turned off and a fuel injection valve having the same. SOLUTION: A first magnetic cylindrical member 14 covers an outer circumference of a movable core 26, and a second magnetic cylindrical member 18 covers an outer circumference of a fixed core 30. The first magnetic cylindrical member 14 and the second magnetic cylindrical member 18 form a magnetic circuit with the movable core 26 and the fixed core 30. A non-magnetic cylindrical member 16 covers an outer circumference of a gap 200 formed between the movable core 26 and the fixed core 30, and prevents short of magnetic flux between the first magnetic cylindrical member 14 and the second magnetic cylindrical member 18. Thickness t of the non magnetic cylindrical member 16, cross section area S1 of the fixed core 30 of a section covered by the non-magnetic cylindrical member 16, sum S2 of section areas of the fixed core 30 and the second magnetic cylindrical member 18 at the non magnetic cylindrical member 16 side in an axial direction, satisfy 0.15 mm≤t≤0.6 mm and 0.55≤(S1/S2)≤0.9. COPYRIGHT: (C)2009,JPO&INPIT
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