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Why Diesel Generators Can Not Be Cold Started And Run With Load

Aug. 15, 2022

After users buy diesel generator sets, generator manufacturers often conduct correct operation training for operators. It can be seen that the operation mode of diesel generator sets is very particular. If the wrong operation is carried out for a long time, it will greatly affect the performance and service life of the unit. Especially, it is absolutely not allowed to run directly with the load after the cold engine is started. Why?


When the diesel generator is cold started, due to the high viscosity and poor fluidity of the oil, the oil pump is insufficient in oil supply, and the friction surface of the machine is poorly lubricated due to lack of oil, resulting in rapid wear and tear, and even failures such as cylinder pulling and tile burning. Immediate load operation of diesel generators in the cold state not only wastes fuel, but also cannot exert the maximum power. When the engine is cold, the fuel combustion is incomplete, and the diesel generator will emit black smoke with abnormal color and pollute the environment. Due to the incomplete combustion of the fuel, the diesel generator power will be insufficient.


diesel generator set

Therefore, the correct operation with load should be as follows: after the diesel generator is cooled and started, it should run at idle speed to heat up, and then run with load when the standby oil temperature reaches 40-60 ℃ or more. Diesel generators should run at low speed for a while, and accelerate sequentially until the oil temperature is normal and the oil supply is sufficient, and then it can be turned into normal operation.


In addition, the act of slamming the throttle after a cold start of the diesel generator is also undesirable. If the throttle is slammed, the speed of the diesel generator will increase sharply, which will cause some friction surfaces on the engine to be severely worn due to dry friction. In addition, the acceptance force of the piston, connecting rod and crankshaft changes greatly when the throttle is slammed, causing severe impact and easy damage to the parts.


In order to make the diesel generator set start and use smoothly when needed, users must not blindly make mistakes in daily operations. At the same time, it is necessary to pay attention to the daily maintenance of the unit and to carry out related maintenance work regularly to ensure that the service life of the diesel generator set will not be affected.


Founded in 1974, Jiangsu Starlight Electricity Equipments Co.,Ltd. is a professional manufacturer of generators and diesel generator sets. It is one of the earliest manufacturers of generators and diesel generator sets in China. The company has first-class inspection equipment, advanced production technology, professional manufacturing technology, to provide you with 3KW-2500KW various specifications of popular, automatic, four protection, automatic switching, low noise and mobile, etc., high quality, low energy consumption. The generator sets can meet all the power needs of customers, and can also meet the requirements of users with different voltages and frequencies, as well as multiple parallel-connected grid-connected power supply systems. For more details, please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.

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