| 摘要 |
PURPOSE:To prevent occurrence of variations in the fuel injection timing, by forming a residual pressure distributing groove branching off from a high pressure passage and communicated with distributing ports for engine cylinders different from a fuel injected engine cylinder only during pressurization of a plunger. CONSTITUTION:A plunger 4 reciprocates while rotates in synchronization with the rotation of an engine to suck and pressurize fuel. In this plunger 4 there are formed a high pressure passage 11 for feeding out pressurized fuel, distributing ports 20A through 20D, a distributing groove 12 branching off from the high pressure passage 11 and communicated with one of the distributing ports in dependence upon the angular position of the plunger, a cut-off port opening the high pressure port in accordance with the displacement of the plunger 4 and a residual pressure distributing groove 25 which is communicated with one of the distributing ports 20 for engine cylinders other than a fuel injected engine cylinder only during pressurizing stroke. With this arrangement, fuel fed under pressure during pressurizing stroke of the plunger 4 is successively distributed into distributing ports 20 for engine cylinders other than an fuel injected engine cylinder, by means of the residual pressure distributing groove 25, and therefore, the residual pressure is ensured. Thus, even if the mount of mixed air is large, air bubbles may be completely eliminated, thereby it is possible to prevent variations in the fuel injection timing and occurrence of cavitation.
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