1. Sealing issue: When operating under low load, the sealing effect between the piston and cylinder liner is poor, causing oil to enter the combustion chamber and burn, resulting in blue smoke from the exhaust.
2. Turbocharger issue: For turbocharged diesel engines, low load or no-load operation can cause a decrease in boost pressure, a decrease in the sealing effect of the turbocharger oil seal, and oil entering the boost chamber and entering the cylinder with the intake air.
3. Carbon deposition problem: Some of the engine oil that enters the cylinder is involved in combustion, and some cannot be completely burned, forming carbon deposits that can deposit in the valves, intake passages, piston tops, and piston rings, affecting engine performance.
4. Oil leakage: When the oil accumulates in the booster chamber of the turbocharger to a certain extent, it will leak out from the joint surface.
5. Increased wear and tear: Long term low load operation can lead to increased wear and tear on moving parts, deterioration of the engine combustion environment, and may require early overhaul of the engine.
Preventive measures:
1. Pre start inspection: Before each start, check whether the cooling water and antifreeze are sufficient, whether the engine oil is within the specified scale line, and ensure that there are no hidden faults.
2. Idle time control: Try to avoid long-term low idle or no-load operation, minimize low load/no-load operation time, and stipulate that the minimum load cannot be lower than 25% -30% of the rated power of the unit.
3. Engine oil management: Regularly check the quality of engine oil to avoid dilution and carbon buildup.
