Under normal circumstances, the exhaust smoke of diesel generator sets is generally light gray. If it is dark gray, it means that the diesel generator set is working at overload and needs to be adjusted in time; if it becomes black smoke, reduce the work of the diesel generator set in time , If the black smoke still continues, it means that the fuel supply system is malfunctioning, and it must be shut down for maintenance.

During maintenance, when the diesel engine is running at idle speed, loosen the injector high-pressure fuel pipe joints one by one to stop the injector's fuel injection and observe the color of the exhaust: When the injector is not malfunctioning, the engine speed will be significant after stopping the fuel injection decline. When the fuel injector is faulty, the speed of the diesel engine changes very little after the fuel injection is stopped, and the exhaust does not emit black smoke. Check and adjust the fuel injector.

The injector has the following requirements: it must have a certain spray pressure, a certain range, a certain spray cone angle, and a good spray. At the end of the fuel injection, the fuel can be stopped quickly without oil leakage or oil leakage.

In addition, if the cylinder is damaged or poorly sealed, white smoke will be generated. At this time, the cylinder head gasket must be replaced in time, and the fuel supply advance angle must be checked and adjusted. At the same time, in order to get a good cylinder seal, a cylinder must be installed between the cylinder head and the cylinder block. pad. The cylinder head is fastened to the cylinder block with bolts. When tightening the bolts, there should be a certain order, that is, in the order of symmetrical expansion from the center to the surroundings. The last time the torque wrench is tightened according to the torque value specified in the manual. Remove the bolts and vice versa.

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