调速器内部杠杆因连接销孔磨损而松旷

The internal lever of the governor is loose due to wear of the connecting pin hole

这种情况下，使增减供油量的双向调速运动产生了过多的变向滞后。发动机工作时，调速反应是必然滞后于实际转速变化的，但滞后量不能太大，否则就会产生较大的调节振幅。调节振幅过大，即当转速已经由于供油量的增减而导致转速升降时仍将继续增减燃油，直到转速超过调速器调节范围较大后，其强烈的反馈信号才通过调速器实现反向调节的反应，结果使调速反应超出了预定的范围，造成了转速在其附近反复有规律升降的时快时慢现象。

In this case, the bidirectional speed regulation movement that increases or decreases the fuel supply has caused excessive directional lag. When the engine is working, the speed response is inevitably lagging behind the actual speed change, but the lag should not be too large, otherwise a large adjustment amplitude will occur. The amplitude of the adjustment is too large, that is, when the speed has already increased or decreased due to the increase or decrease of fuel supply, the fuel will continue to increase or decrease until the speed exceeds the adjustment range of the governor. The strong feedback signal will only be reflected in the reverse adjustment through the governor, resulting in the speed response exceeding the predetermined range, causing the speed to repeatedly rise and fall in a regular pattern near it, sometimes fast and sometimes slow.

供油齿杆不够灵活

The fuel supply gear rod is not flexible enough

喷油泵的供油齿杆须保持灵活，以保证调速反应的灵敏性。用灵敏的弹簧秤对齿杆进行拉动阻力测试，对应缸喷油泵的拉动阻力应分别不大于规定值。由于生锈、柱塞偶件紧固后变形、柱塞弹簧折断后齿圈与齿杆啮合处碾伤、齿杆端部轴套严重磨损、拨叉式油量调节机构的拨叉紧固角度不正确，喷油泵调速器的推力斜盘和飞球座的安装或配合不良等原因，都会影响供油齿杆的灵活性。当这种影响灵活性的阻力还未达到使供油齿杆不能移动的程度时，就会出现时快时慢现象（若供油齿杆不能移动，出现故障现象将视齿杆停留位置不同而有所区别；例如，柴油发电机不能启动、不能熄火、转速不受控制、飞车等）

The fuel supply rod of the fuel injection pump must remain flexible to ensure the sensitivity of the speed control response. Use a sensitive spring scale to test the pulling resistance of the gear rod, and the pulling resistance of the corresponding cylinder fuel injection pump should not exceed the specified value. Due to rusting, deformation of plunger components after fastening, crushing at the meshing point between the gear ring and the gear rod after the plunger spring is broken, severe wear on the shaft sleeve at the end of the gear rod, incorrect tightening angle of the shift fork of the oil quantity adjustment mechanism, and poor installation or coordination of the thrust inclined plate and flying ball seat of the fuel injection pump governor, the flexibility of the fuel supply gear rod can be affected. When the resistance that affects flexibility has not yet reached the level that prevents the fuel supply rod from moving, a phenomenon of sometimes fast and sometimes slow will occur (if the fuel supply rod cannot move, the fault phenomenon will vary depending on the position of the rod; for example, diesel generators cannot start, cannot stop, the speed is not controlled, and the speed is flying, etc.)

稳速弹簧调整不当

Improper adjustment of the stabilizing spring

这与怠速不稳定时稳速弹簧调整不当相似，是因为稳速弹簧与供油齿杆不能共同灵活的起作用。

This is similar to improper adjustment of the stabilizing spring when the idle is unstable, because the stabilizing spring and the fuel supply gear rod cannot work together flexibly.

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