Fault Analysis Of Excessive Fuel Supply Of Oil Pump Of Diesel Generator Set

As a kind of mechanical equipment, diesel generator set itself is composed of many different kinds of parts. Among them, the most prone to failure are fuel injection pumps, fuel injectors, governors, etc., especially fuel injection pumps. Once the fuel is supplied excessively, there will be insufficient combustion, poor color, etc., and the most serious problem will be the exhaust pipe. The phenomenon of fire breathing. Excessive fuel injection not only wastes fuel, it affects the normal power generation of the generator, but also greatly reduces the service life of the generator set.

The common reasons for the excessive fuel supply of the fuel injection pump are: 1. The maximum adjustment screw of the governor limit frame is adjusted too much or the limit screw of the throttle handle is adjusted too much. 2. The fuel injection pump plunger adjusts the fuel supply amount to be too large, or the adjustment ring gear lock screw is loose, which causes the adjustment gear ring displacement to cause the fuel injection pump to supply too much; 3. The fuel injection pump fuel supply is too large, due to the governor If there is too much oil in the machine, the oil supply will increase.

During the start-up period, the fuel injection quantity of the generator set can not help being determined by the signal of the air flow meter or the signal of the pressure sensor of the intake manifold, but once it is started, it will be immediately changed to the signal of the air flow meter or the pressure of the intake manifold. The sensor signal and the engine speed signal determine the basic fuel injection quantity, plus some corrections.

If the air flow meter signal or the intake manifold must have an error in the pressure sensor signal, it may cause the engine of the generator set to fail to run smoothly immediately after starting, resulting in starting failure, that is, starting difficulty. When the engine ECu judges that the air flow meter or the intake manifold pressure sensor is in effect and recalls the defect code, it usually activates the defect failure maintenance function or activates the backup system. At this time, Weichai generator sets can generally be started.

When the amount of fuel injected by the diesel generator set is too much, it can be checked based on the above three failure causes, so as to improve the working efficiency of the diesel generator set.