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← TechnologyWhich outcome occurs when diesel fuel "after-injection" ceases functioning in a modern engine?
A)Increased particulate matter formation✓
B)Decreased thermal efficiency overall
C)Reduced cylinder peak pressure
D)Higher oxides of nitrogen emissions
💡 Explanation
Increased particulate matter results because the after-injection promotes soot oxidation in Exhaust Gas Recirculation, chemically reducing unburnt fuel and soot; therefore, after-injection failure means increased particulate matter rather than higher combustion efficiency normally fostered by optimized injection timing.
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