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← TechnologyWhich outcome occurs when excessive pre-ignition erodes the piston crown within a gasoline engine?
A)Detonation causing cyclic pressure oscillations✓
B)Increased volumetric efficiency from heating
C)Reduced oil consumption due to blow-by
D)Catalytic converter overheating from fuel
💡 Explanation
When pre-ignition erodes the piston crown, it introduces hot spots that trigger uncontrolled combustion leading to detonation because the air-fuel mixture ignites prematurely, resulting in damaging pressure oscillations. Therefore, cyclic pressure oscillations result, rather than efficiency gains, consumption changes or converter failures, which involve different mechanisms.
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