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← TechnologyWhich outcome occurs when the fuel injector in a modern diesel engine experiences needle valve sticking?
A)Increased NOx emissions from oxygen-rich regions✓
B)Reduced engine power linked to misfire events
C)Elevated engine oil viscosity from mixture dilution
D)Decreased particulate matter because of better atomization
💡 Explanation
When the injector valve sticks closed, incomplete combustion occurs because less fuel is delivered into the cylinder due to diminished spray effectiveness impacting homogeneous vapor generation, creating oxygen-rich uncombusted regions. Therefore, increased NOx emissions result, rather than power loss, dilution, or particulate reductions which require different injection dynamics.
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