| 摘要 |
In a distributor type fuel injection pump in which fuel is sucked and pressurized by a reciprocating and rotating plunger, and the pressurized fuel is fed under pressure to each fuel injection nozzle from a distribution port by means of a distribution path, the improvement constituted by a delivery valve to be provided in the distribution path is omitted or a delivery valve having a large suction return quantity is provided, and an auxiliary port is provided in the plunger, and a groove for taking out the pressure when it is aligned with the auxiliary port is formed in the plunger barrel, and a uniform pressure slit is formed on the plunger which is at an identical position with that of the distribution port and being circumferentially offset by a proper angle, and the uniform pressure slit is communicated with the groove for taking out the pressure by means of a communicating path, and a pressure equalizing valve is provided in the communicating path, whereby non-continuous injection in a low speed zone can be prevented while the residual pressure before the injection can be set at high pressure, and also, the generation of a secondary injection can be curbed on account of the pressure after the injection being zero or the pressure after the injection being lowered to near zero.
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