What is 'ash loading' in a DPF system, and how is it managed?
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A
The accumulation of incombustible metallic ash from engine oil additives, removed by periodic DPF cleaning
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B
The buildup of carbon soot on the DPF substrate, removed by regeneration
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C
The coating of the DPF with DEF residue, removed by high-temperature purging
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D
The accumulation of fuel additives on the DPF walls, removed with chemical cleaning