The speed of the diesel engine in the wheel loader must be the same, and the intake air amount is basically unchanged, and the fuel injection amount changes with the load size, and the fuel injection amount increases, so the acceleration pedal position reflects the size of the diesel engine load. In the traditional mechanical conditioning fuel injection nozzle pump, the driver directly adjusts the circulating fuel injection quantity of the fuel injection pump through the fuel supply lever connected to the accelerator pedal when accelerating.
Classification:
1. The loader actively shuts down during the work and shuts down by itself.
2. When the load of the loader is turned off, the flame is turned off.
The reason why the loader stalls:
1. The loader automatically shuts down automatically. Common reasons include:
1. Lack of fuel causes self-extinguishment.
2. Leakage in the oil path of the excavator, the fuel injection pump is defective.
3. The excavator will turn off by itself. If there is a black smoke phenomenon in the exhaust pipe of the engine before the engine speed gradually decreases, it is likely that the oil supply of the excavator is not smooth, the engine is poorly lubricated, and the engine shaft is burnt.
4. If the excavator is actively turned off after the hot car, and the excavator will not start after a short time, it may be a diesel pump (high pressure oil pump) or a nozzle problem. At this moment, the diesel pump can be flushed with cold water. If you can hit it immediately, there is a problem with the oil pump or nozzle.
5. Suddenly turn off the flame during the excavator operation, or the diesel may be unclean. It is advocated that the diesel filter can be replaced first, and the fuel injection nozzle is corrected.
6. Engine problems: The engine's intake resistance is large, and the oil intake is blocked, causing self-extinguishment.
7. Hydraulic system problem: the pump pressure is too high.
8. Excavator electrical problems: The control system received an error signal, resulting in active flameout.
Second, the loader stops the flame
Under normal circumstances, if the excavator suddenly shuts down during the operation and the flame is stopped, you need to do the following:
1. The primary requirement is to check the oil supply path of the digging machine to see if the oil supply of the oil path is smooth? Is there any blockage in the oil path? It is advocated to be able to clean the fuel filter, replace all filter elements, disassemble the diesel pump, and check the fuel injection length Whether it reaches about 6 ~ 7cm.
2. Next, it is necessary to check whether the engine self-protection function is started because the engine is overloaded or the engine is overheated because of the long-term operation of the excavator engine.
3. The excavator suffocates the flame. In general, it is a fault of the fuel circuit. It is recommended to carefully check whether there is air leakage or oil leakage in the oil circuit, whether the pipe joint seal is damaged, whether the filter element is stuck, or the oil-water separator drain cap Is there any tightening?
5. Suppression of flameout may also be a hydraulic problem. Specifically, it is caused by the mismatch between the power of the hydraulic pump and the engine. At this moment, it needs to be measured by professional maintenance equipment, and the commissioning of the pressure of the valve group requires professional equipment. The sliding electric shock moves accordingly, and the output voltage can be smoothly and continuously changed at the output end.
