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Turbocharger oil leakage problem

Home / Technical Articles / Details ...
2018/6/19

Burning much oil is almost the pain point for most drivers. However, all vehicles cannot escape the destiny of oil consumption, and “excessive” oil consumption can cause severe engine damage. Turbocharger engine oil is one of the culprits that caused "excessive" consumption of engine oil. So why is the turbocharger oil consumption?

First of all, we need to understand that not all oil consumption is called burning oil. Because the engine itself can not fundamentally eliminate the consumption of oil. Like a greasy plate or bowl, you use a spoon to scratch even if it is a knife, the oil is always not clean. This is the same with the oil ring on the piston, never scraping the same oil on the cylinder wall.

Insufficient lubrication causes turbocharger failure

For experienced drivers, it usually takes a minute or two before the vehicle stalls. The newcomers turn off without knowing that this will cause chronic damage to the turbocharger.

When the turbocharger is running at high speed, the speed easily exceeds tens of thousands of revolutions. The middle turbine rotor shaft is a precision component that needs to bear tens of thousands of revolutions and high temperature. The role of the oil is to establish an oil film between the rotor shaft and the housing so as to achieve lubrication and heat dissipation.

When the diesel engine is in normal operation, the supercharger rotates at a very high speed and temperature. If the engine is shut down directly, the oil pump will stop working directly, and the supercharger will have a slow speed process. Semi-dry friction will occur in the middle and rotor shafts, which will easily lead to signs of early wear of the turbocharger. As a result, the rotor shaft and oil seal are damaged, causing the turbocharger to exhibit oiling.

Unclean oil wear booster

If the density of impurities in the oil is too high, the hard particles in the oil will scratch the housing and the seal ring, which will lead to early damage to the turbocharger.

If the rotor shaft appears and early wear of the oil seal occurs, the high-speed turbocharger will directly bring the oil out of the shell, even directly from the air intake system to the engine to participate in the combustion, resulting in a drop in power and the vehicle will emit blue smoke. Happening.

Large intake air exhaust resistance leads to oil leakage

During the inspection and repair process, we may have seen the phenomenon of “sucking” at the front of the intake pipe. In fact, this phenoenon is one of the reasons why the turbocharger is pumping oil.

If the intake or exhaust resistance of the engine is too high, a vacuum may be instantaneously formed between the compressor and the turbocharger housing. If the oil seal shows signs of early wear, the oil can easily be "sucked" to the compressor (intake side) position and enter the engine directly through the intercooled system.

Under normal circumstances, turbochargers can be judged by observing the engine oil. If the turbocharger has a serious leak of oil, it will directly take away a large amount of oil, even if the case of pumping oil every minute has also appeared, in serious cases will cause the engine to pull the cylinder, burn the shaft holding the tile Such phenomena.