1. improve the cooling water temperature of diesel engine. The low cooling water temperature of water-cooled diesel engine will result in the incomplete combustion of diesel oil, high viscosity of engine oil, increased operating resistance and increased fuel consumption, so it is necessary to raise the cooling water temperature of diesel engine.

2. keep the best oil supply angle. When the diesel engine is used for a period of time, due to the wear and tear of the plunger couple and the fuel injection pump transmission, the fuel supply advance angle will be reduced, resulting in the late fuel supply time, fuel consumption increases, so it should be ensured that the fuel supply angle is at the best angle.

3. make sure that the machine does not leak. There are holes in diesel oil pipelines due to uneven joints, gasket deformation or damage. The solution is: first, gasket is coated with valve paint to be grinded on the glass plate to correct the tubing joint. If there is no oil return device, a diesel oil recovery device should be added, and the oil return pipe on the oil nozzle can be connected with the hollow screw of the oil tank to make the oil return into the oil tank.

4. oil before purification. More than half of the diesel engine's troubles come from the oil supply system. The solution is as follows: 1. The diesel oil bought back can be deposited for 2-4 days and then the upper oil can be used to precipitate 98% of the impurities. If you buy now, you can put two layers of silk cloth or toilet paper in the oil tank filling screen, so as to filter out impurities.

5. change the practice of "big Marla trolley". Agricultural diesel engines often have the phenomenon of "big machines with small pumps", which is a waste of energy. Improvement: Increase the diesel engine pulley properly, increase the pump speed under the condition of the diesel engine running at reduced speed, increase the flow rate, head and shaft power, achieve the purpose of energy saving.