| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection device capable of improving responsiveness without causing reduction of a seal degree in a seal part or irregularity of fuel injecting quantity even when a valve member is formed compact. SOLUTION: A valve seat 27 to form the seal part 35 with an abutment part 33 of a needle 30 is formed on an inner circumferential wall 20a of a valve body 20. A supposed perpendicular line through the seal part 35 and perpendicular to the inner circumferential wall 20a crosses it at one point on the side of a movable core 31. This intersection point where the supposed perpendicular line crosses it is positioned between an end part of a guide part 28 on the side of the seal part 35 and an end part on the counter-seal part side. Since an end part of the needle 30 on the side of the abutment part 33 is rotated around the intersection point of the supposed perpendicular line, it becomes hard for the needle 30 to get in contact with the guide part 28 as the intersection point gets closer to the guide part 28. Even when total length of the needle 30 is shortened to achieve compactness, it is prevented from coming in contact with the guide part 28 when it is inclined. Reduction of the seal degree of the seal part 35 due to contact of the needle 30 with the guide part 28 can thus be prevented. COPYRIGHT: (C)2004,JPO
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