Technician A says that when fuel is being dosed to a DPF, the unit is being passively regenerated. Technician B says that when fuel is being dosed to a DPF, the unit is being actively regenerated. Who is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because active regeneration of a Diesel Particulate Filter (DPF) involves injecting fuel into the exhaust stream to increase the temperature and burn off the accumulated soot, whereas passive regeneration occurs naturally when the vehicle's operating conditions maintain sufficient exhaust temperatures without additional fuel dosing.

Technician a Says That When Fuel Is Being Dosed to a DPF