After a cold start of a diesel engine, do not forcefully press the accelerator pedal

Insufficient cooling water for diesel generators can reduce their cooling effectiveness, causing the diesel engine to overheat due to ineffective cooling; Excessive temperature of cooling water and engine oil can also cause diesel engine overheating. At this time, the cylinder head, cylinder liner, piston components, and valves of the diesel generator are mainly subjected to high thermal loads, resulting in a sharp decrease in their mechanical properties such as strength and toughness. This increases the deformation of the parts, reduces the clearance between them, accelerates the wear of the components, and in severe cases, may even cause cracks and component jamming. Overheating of the diesel generator can also worsen the combustion process of the diesel engine, causing the fuel injectors to malfunction, poor atomization, and increased carbon deposits.

After the diesel generator set is turned off, the circulation of cooling system water stops, the heat dissipation capacity decreases sharply, and the heated parts lose cooling, which can easily cause overheating of components such as cylinder head, cylinder liner, cylinder block, etc., resulting in cracks, or causing the piston to expand excessively and get stuck in the cylinder liner.

On the other hand, if the diesel generator is stopped without idle cooling, the oil content on the friction surface will be insufficient, and when the diesel engine is restarted, it will be exacerbated by poor lubrication and wear. Therefore, before turning off the diesel generator, the load should be unloaded and the speed should be gradually reduced, running at no load for a few minutes.

If the accelerator is suddenly pressed, the speed of the diesel generator will increase sharply, causing some friction surfaces on the engine to wear severely due to dry friction. In addition, when the accelerator is pressed, the force received by the piston, connecting rod, and crankshaft changes greatly, causing severe impact and easily damaging the components.

When the diesel generator is started with a cold engine, due to the high viscosity and poor fluidity of the engine oil, the oil pump supply is insufficient, and the friction surface of the machine is poorly lubricated due to lack of oil, resulting in rapid wear and even cylinder pulling, tile burning and other faults. Therefore, after the diesel engine is cooled down and started, it should be run at idle speed to heat up, and then run with load when the oil temperature reaches 40 ℃ or above; When starting the machine, it should shift to low gear and drive sequentially in each gear for a certain distance until the oil temperature is normal and the fuel supply is sufficient, then it can switch to normal driving.

When the diesel engine runs low on engine oil, insufficient oil supply can cause insufficient oil supply to the surfaces of various friction pairs, resulting in abnormal wear or burns. Therefore, before starting the diesel generator and during the operation of the diesel engine, it is necessary to ensure sufficient oil to prevent cylinder pulling and tile burning faults caused by lack of oil.