| 摘要 |
PROBLEM TO BE SOLVED: To achieve cost reduction and improve spray characteristic balance of the distributed fuel, in a fuel injection valve of an internal combustion engine that injects fuel in an uneven distribution inn two directions. SOLUTION: An orifice plate 5 is closely fixed to an end surface of a valve body 3 that defines a downstream portion of a fuel passage 1a. The orifice plate 5 has two types of jet holes 501, 502 formed to face two directions at an acute angle with respect to an axial line C direction of the valve body 3. Fuel is distributively injected from the jet holes 501, 502 in the two directions. All of the jet holes 501, 502 have the same diameter, so that forming of the jet holes can be facilitated and spray characteristic balance of the distributed fuel can be improved. The ratio of the number of the jet holes 501 of the first type jet hole to that of the jet holes 502 of the second type jet hole is set to be an uneven predetermined value. Thus, the fuel is injected in an uneven distribution.
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