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Factors Affecting the Fuel Consumption of Diesel Generator Sets
Release time:
2025-09-28
During the use of diesel generator sets, many users encounter the problem of increased fuel consumption.
During the use of diesel generator sets, many users encounter the problem of increased fuel consumption. However, no problems are detected during the inspection of the diesel generator sets, and no specific reasons can be found during the maintenance. So, what factors affect the fuel consumption of diesel generator sets?
Generally, engine oil enters the combustion chamber through the gaps between the piston rings and ring grooves and the gaps between the valves and guides. The direct reason for its entry is that the first - stage piston ring, near the top dead center, has a sharp drop in its movement speed, which causes the lubricating oil attached to it to be thrown into the combustion chamber. Therefore, the fit clearance between the piston ring and the piston, the oil - scraping amount and ability of the piston ring, the pressure in the combustion chamber, and the viscosity of the engine oil are all closely related to the engine oil consumption. If a large fuel consumption is found, the following inspections can generally help identify the problem and solve it quickly.
Check whether the sealing gaskets at the connection points such as the diesel engine body, gear chamber cover, large disc on the side of the traveling wheel, rear cover, and cover are intact, and whether the screws at the connection points are loose. If there is an oil - leakage phenomenon at the rack position, inspect the engine oil shell. Mainly check the front end of the engine oil shell on the same side as the traveling wheel. Generally, this is because the screws of the engine base are loose. Under the pull of the triangular belt, the traveling wheel rubs against the angle iron of the rack that protects the engine oil shell for a long time, forming a gap and causing an oil - leakage phenomenon.
The wear of the diesel engine valve guide causes additional engine oil consumption of the generator set.
Engine wear causes longitudinal scratches on the cylinder liner of the diesel engine. The cylinder diameter and the piston side clearance exceed the specified values, resulting in a corresponding decrease in the support force of the piston ring and an incomplete oil - scraping phenomenon. Or, the internal support torsion spring in the oil ring is broken, causing incomplete oil - scraping and participation in combustion. This leads to difficulties in starting the diesel engine, blue smoke from the exhaust pipe, serious oil spraying from the breather, and additional engine oil consumption.
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