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← TechnologyWhich risk increases when excessive cylinder pressure occurs during direct injection in a diesel engine?
A)Piston ring blow-by✓
B)Fuel injector cavitation
C)Intercooler thermal runaway
D)Catalytic converter poisoning
💡 Explanation
Excessive cylinder pressure promotes increased piston ring blow-by due to greater force overcoming ring sealing capability. This is because gas escapes past the piston rings, rather than complete combustion; therefore, blow-by occurs, rather than improved combustion efficiency.
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