| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for reducing pressure pulsation furthermore while maintaining its compact size and low cost, since an effect for reducing the pressure pulsation is low in a conventional orifice in a technique for preventing the pressure pulsation being transmitted into an accumulator by providing an orifice in a part of a fuel passage connecting piping with the accumulator. <P>SOLUTION: A shaft center A of an orifice 31 is offset in an outer diameter direction from a shaft center B of an outer fuel passage 32 on a side closer to an outlet side than the orifice 31, and the orifice 31 is opened near an outermost diameter of the outer fuel passage 32. Pressure pulsation is reversely returned through injector piping and is transmitted to the outer fuel passage 32, and the pressure pulsation is transmitted to the shaft center B of the outer fuel passage 32 with the largest magnitude and is decreased toward the outside in a diameter direction from the shaft center B, so that the pressure pulsation passing through the orifice 31 is reduced. Therefore, even in simple structure for reducing the pressure pulsation only by the orifice 31, an effect for reducing the pressure pulsation is enhanced. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
