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← TechnologyWhich outcome occurs when excessive fuel accumulates behind the piston rings in a turbocharged diesel engine?
A)Cylinder wall lubrication decreases rapidly✓
B)Fuel line pressure immediately stabilizes
C)Exhaust valve closure timing improves
D)Charge air temperature declines gradually
💡 Explanation
Cylinder wall lubrication decreases because fuel, due to crevice flow, dilutes the oil film via washing. This is the **detergency mechanism**, whereby the fuel removes residual oil. Therefore oil film depletion results; rather than more fuel-favorable conditions appearing suddenly.
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