Why do diesel generators have a higher fuel consumption?


Where does the diesel generator oil consumption go? Som […]

Where does the diesel generator oil consumption go? Some of it goes to the combustion chamber due to "squeeze oil", burned or formed with carbon deposits, and the other part leaks from the tight seal.

The oil generally passes through the gap between the piston ring and the ring groove, and the gap between the valve and the pipe enters the combustion chamber. The direct cause of the intrusion is that the first piston ring, near the top dead center, has a sharp drop in its speed of movement, and the lubricating oil attached to it is thrown into the combustion chamber. Therefore, the clearance between the piston ring and the piston, the amount of oil scraped and the oil scraping capacity of the piston ring, the pressure in the combustion chamber and the viscosity of the oil are all closely related to the oil consumption.

From the operating conditions, the viscosity of the used oil is too low, the engine speed and water temperature are too high, the cylinder liner deformation exceeds the limit, the number of starts and stops is frequent, the engine parts are excessively worn, the oil level is too high, etc., and the oil consumption is increased.

The piston is deflected due to the bending of the connecting rod and the tolerance of the body shaping (the mark is the two ends along the axis of the piston pin hole, and the piston sleeve and the piston skirt on the other side have the wear of the cylinder liner and the piston) It is also an important reason for the increase in oil consumption.

The use of twisted ring and combined oil ring has a significant effect on reducing the oil consumption. In particular, the combined oil ring is light in weight, and the three-piece structure has no pumping effect. It is self-smooth and has good adaptability to the cylinder wall. The side is close to the ring groove.