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← TechnologyWhich outcome results when diesel fuel injectors experience excessive 'needle bounce' during injection?
A)Increased particulate matter emissions✓
B)Reduced engine knocking tendency
C)Improved fuel efficiency at low loads
D)Decreased peak cylinder pressure
💡 Explanation
When excessive needle bounce occurs in diesel injectors, incomplete combustion results because the fuel spray atomization is disrupted due to inconsistent fuel delivery. Therefore increased particulate matter emissions results, rather than reduced knocking, improved efficiency, or decreased pressure, which require precise injection timing and pattern.
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