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← TechnologyWhich outcome occurs when thermal runaway induces pre-ignition in stratified fuel injection?
A)Increased unburned hydrocarbon emissions✓
B)Improved combustion turbulent flame speed
C)Optimized volumetric engine efficiency
D)Decreased nitrogen oxides, NOx, creation
💡 Explanation
Increased unburned hydrocarbons result because thermal runaway causes premature combustion during fuel injection, bypassing controlled ignition. Therefore, unburned fuel increases, rather than experiencing more effective late-cycle combustion that would reduce emissions like NOx.
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