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← TechnologyWhich outcome occurs when excessive charge cooling condensation introduces liquid fuel droplets into an Otto cycle's combustion chamber post fuel injection?
A)Increase in unburnt hydrocarbon emissions✓
B)Improved catalyst light-off performance
C)Stabilized lean air-fuel combustion phasing
D)Reduced engine knock propensity indices
💡 Explanation
Unburnt hydrocarbon emissions increase because liquid fuel prevents complete oxidation; therefore significantly more fuel remains uncombusted, rather than forming CO₂ and H₂O, because non-vaporised droplets will not react due to reduced reaction area and local non-stoichiometry.
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