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← TechnologyWhich outcome occurs when direct fuel injectors in a diesel engine experience thermal cracking?
A)Increased particulate matter emissions✓
B)Cylinder overheating due to pre-ignition
C)Reduced engine torque at high RPM
D)Fuel pump failure from cavitation
💡 Explanation
When injectors experience thermal cracking, incomplete combustion occurs because the fuel atomization is non-uniform, leading to regions of fuel-rich combustion that increase particulate matter emissions. Therefore, increased particulate matter results, rather than cylinder overheating, engine torque reduction, or fuel pump failure, which require different mechanisms.
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