| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable injection hole injection valve suppressing the adhesion of deposit on a sack chamber at a valve body tip bottom, moreover, to an injection hole inner surface and the vicinity of an injection hole outlet. SOLUTION: This common rail type variable injection hole injection valve is provided with a valve body, the sack chamber arranged at the tip bottom of the valve body, a first injection hole group and a second injection hole group formed at the valve body and injecting fuel, one or more open close valve opening and closing the first injection hole group and the second injection hole group, changes over an injection mode between a first injection mode injecting fuel from only the first injection hole group and a second injection mode injecting fuel from both of the first injection hole group and the second injection hole group, and is formed with a communication hole for keeping communication between the sack chamber and the combustion chamber, and a valve member arranged to block the communication hole from the inside of the valve body and opening the communication hole by the cylinder pressure of the combustion chamber on the tip bottom of the valve body. COPYRIGHT: (C)2007,JPO&INPIT
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