Engine Load Cycles and Combustion Quality - A Deeper Look at Emission Output

The cumulative effect of repeated high-load spikes shows up clearly in a formal emissions test because the combustion residue they leave behind affects injector condition, EGR valve function, and DPF loading over time. A vehicle with a history of frequent high-load spikes arrives at a test in measurably worse emissions conditions than one that has operated under more consistent load patterns.

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