柴油机经过长期工作以后，由于有关配合件的磨损或相对位置的变化，会使原来的供油提前角发生变化，一般会滞后变小，容易造成柴油机启动困难．燃烧不完全，排气冒黑烟，功率不足，机温过高；但由于调整不当，也会发生供油太早的情况，会造成柴油机工作时有敲击声，启动时容易 Diesel engine after long-term work, due to the wear or relative changes with the relative position, will change the original fuel supply advance angle, the general will lag smaller, likely to cause difficulties in starting the diesel engine. Incomplete combustion, exhaust black smoke, lack of power, the engine temperature is too high; but due to improper adjustment, oil supply will occur too early, will cause percussion when the diesel engine work, easy to start