| 摘要 |
PROBLEM TO BE SOLVED: To materialize a fuel injection valve capable of shortening heating time without deteriorating seating properties of a valve element shaft. SOLUTION: A valve element 6 including a hollow valve element shaft 7 is inserted in a cylinder part 3 of a casing 2 on which a nozzle main body 5 having a valve seat 4 on a tip thereof is installed in such a manner that the same can freely slide, fuel is introduced to a fuel passage 15 formed by the valve element shaft and the cylinder part 3 from a fuel outlet 25 opened on a shaft wall of the valve element shaft 7, fuel is heated by a heater 16 provided on an outside of the fuel passage of the cylinder part 3 to jet out the same from the nozzle main body 5, a sleeve 17 is installed in the fuel passage 15 and the fuel passage above the fuel outlet is blocked by a large diameter part 21, a fuel inlet 24 is formed on a small diameter part 22 of the sleeve 17 to introduce fuel into the fuel passage, and quantity of fuel to be heated by the heater is reduced by narrowing the fuel passage to shorten heating time. COPYRIGHT: (C)2007,JPO&INPIT
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