Causes and Harms of the Decrease of the Load Capacity in Diesel Generator Sets

Sep. 03, 2021

Diesel generator sets will experience varying degrees of power reduction according to the impact of the environment of the engine room, the service life of the unit, daily maintenance, whether the equipment accessories are in time, etc., that is, the load capacity of the unit decreases, and the load capacity of the diesel generator set Decrease, the unit will run under small load for a long time. As the running time accumulates, the following hazards will occur. The user should understand the causes and make timely adjustments.


The Causes and Harms of the Decrease of Load Capacity of Diesel Generator Sets

1. For a supercharged diesel generator set, due to low load, no load, and low boost pressure, it is easy to cause the sealing effect of the turbocharger oil seal (non-contact) to decrease.

2. When the oil in the pressurizing chamber of the turbocharger accumulates to a certain extent, it will leak out from the joint surface of the turbocharger.

3. Part of the oil moving up to the cylinder participates in the combustion, and part of the oil cannot be completely burned, forming carbon deposits on the valve, intake passage, piston crown, piston ring, etc., and some of it is discharged with the exhaust gas. In this way, oil will gradually accumulate in the exhaust duct of the cylinder liner, and carbon deposits will also be formed.

4. Long-term low-load operation will aggravate the wear of the moving parts of the unit, worsen the combustion environment of the diesel generator set, and lead to the advancement of the overhaul period of the unit.


The main reasons for the decrease in the loading capacity of diesel generator sets are:


1. The air filter is too dirty and the intake air is not enough. At this time, the air filter must be cleaned or replaced;

2. The fuel filter is too dirty and the fuel injection quantity is not enough, so it must be replaced or cleaned;

3. The ignition time is not correct and must be adjusted.

4. Natural wear and tear of some parts of diesel generator sets;

5. The power of the diesel engine is also related to the amount of air and the amount of diesel that can be burned. 6. High air temperature and high humidity in the engine room will also reduce the loading capacity of the diesel generator set.


Dingbo Power recommends that the majority of users should minimize the low-load/no-load operation time, and the minimum load should not be less than 25%-30% of the rated power of the unit. Guangxi Dingbo Power Equipment Manufacturing Co., Ltd. was established in 2006. It is a diesel generator manufacturer integrating design, supply, debugging and maintenance of diesel generator sets. It has always been committed to providing customers with comprehensive solution and caring one-stop diesel generator sets. Our service hotline is +8613667715899 or you can contact us directly by for consultation.

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