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Which outcome occurs when excessive post injection occurs during diesel combustion?

A)Increased particulate matter formation
B)Improved net thermal efficiency
C)Reduced cycle duration time
D)Decreased peak cylinder pressure

💡 Explanation

Excessive post injection causes incomplete combustion due to a shortage of oxygen, via the **diffusion flame**, therefore higher soot formation results, rather than reduced emissions because unburnt vapor condenses as PM because the cylinder temperature decreases.

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