What is The Impact of Intake System Faults on Diesel Engine Performance

The main components of the air intake system of the diesel generator are air filter, air intake pipeline, compressor, Intercooler, intake manifold, etc. The intake system has a significant impact on the power performance of diesel engines. If the air intake is insufficient, it can lead to indigestion of the diesel engine; If the air intake is insufficient, it can lead to abnormal wear and tear of the diesel engine in the early stages. Today, Dingbo Power will introduce to you the adverse effects of air intake system failure of diesel generator on diesel engine performance. The specific analysis is as follows:

1.The function of an air filter is to remove dust and impurities from the air, sending clean air into the combustion chamber to reduce wear between the piston and cylinder liner, piston group, and valve group. In addition, it also has the effect of suppressing the intake noise of diesel engines.

If the filter element of the air filter becomes blocked, or if there is an increase in resistance when air passes through due to quality issues, it will result in insufficient intake in the diesel engine. If the amount of air entering the cylinder decreases, the direct result is incomplete combustion of the fuel in the cylinder. At this point, the diesel engine may experience insufficient power and black exhaust smoke.

2.There is usually a rubber hose connection in the connecting pipeline from the air filter to the diesel engine intake manifold (For turbocharged diesel engines, it is the intake port of the compressor). If the hose is compressed or damaged internally due to certain reasons, it will affect the air flow rate. The result is the same as the blockage of the air filter, which will also lead to insufficient power and black exhaust smoke in the diesel engine due to insufficient intake.

3.Air short circuited into the cylinder. If the quality of the air filter is poor or there is damage or air short circuit on the intake pipeline, causing unclean air to enter the cylinder, it will cause serious wear of the diesel engine cylinder liner, piston, and piston ring, and cause problems such as blue exhaust, black smoke, insufficient power, and oil burning.

4.The purpose of the diesel engine exhaust gas turbocharging system is to increase the air pressure entering the cylinder, thereby increasing the density of air entering the cylinder, so as to increase the fuel injection volume and improve the power.

When some reasons lead to insufficient boost pressure or the pipeline behind the turbocharger compressor (such as Intercooler, intake manifold interface, etc.) is blocked or leaked, the diesel engine will also have power decline and other failures due to insufficient intake.

In addition, if the sealing gasket at the intake port on the cylinder head is damaged and leads to poor sealing, it will reduce the boost pressure, which will also lead to insufficient power failure in the diesel engine.

5.When the diesel engine runs normally at idle speed but emits black smoke during load operation, it is highly likely that the air filter is blocked, resulting in insufficient intake. At this point, the air filter can be removed for a short time and the diesel engine can be started to operate under load. If the black smoke disappears, it indicates that the air filter is blocked and needs to be cleaned or replaced.

6.If the diesel engine always experiences abnormal wear of unknown causes such as cylinder pistons, after excluding factors such as accessory quality and oil quality, unclean intake air in the intake system should be the main cause. At this point, the entire intake system from the air filter inlet to the intake manifold inlet on the cylinder head should be carefully checked for damage or air short circuits, especially for special purpose interfaces on the intake pipe that may cause air short circuits.

If you are interested in diesel generator set or would like to know more about diesel generator, please contact us by email at dingbo@dieselgeneratortech.com .