ASE X1 Exhaust Systems Specialist [exhaust]

What initiates an 'active regeneration' cycle in a diesel DPF system?

Driver manually pressing a regeneration button ECU detecting that soot load has reached a threshold and injecting extra fuel to raise exhaust temperatures Opening of the EGR valve to allow hot gases to burn the soot A coolant temperature-triggered post-injection event at startup

Correct Answer:

ECU detecting that soot load has reached a threshold and injecting extra fuel to raise exhaust temperatures

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