Engine speed and duration during parked regeneration are which of the following?

Engine speed and duration during parked regeneration are which of the following?

• A. Engine speed increases to 1500 rpm and lasts 30-60 minutes
• B. Engine speed increases to 1700 rpm and lasts 15-25 minutes
• C. Engine speed increases to 1800 rpm and lasts 60-90 minutes
• D. Engine speed increases to 1600 rpm and lasts 20-40 minutes

Answer: (D)

During a parked regeneration, the engine is run at a higher idle to heat the exhaust and burn off soot in the diesel particulate filter. The recommended setting is around 1600 rpm held for about 20 to 40 minutes. This combination provides enough heat to complete the regeneration without excessive fuel use or risking engine stress. The other options either push the engine speed too high or run for too long or too short, which doesn’t align with typical parked regen practice.

During a parked regeneration, the engine is run at a higher idle to heat the exhaust and burn off soot in the diesel particulate filter. The recommended setting is around 1600 rpm held for about 20 to 40 minutes. This combination provides enough heat to complete the regeneration without excessive fuel use or risking engine stress. The other options either push the engine speed too high or run for too long or too short, which doesn’t align with typical parked regen practice.