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V-MAC Co-Pilot Operator's Manual
Aftertreatment System Conditioning (Periodic Heat Mode) During periods of extended idling (typically 8 or more hours), the aftertreatment system will accumulate unburned hydrocarbons that are released from a diesel engine. Accumulation of these hydrocarbons can oxidize in the aftertreatment system and can cause damaging temperature spikes and potential hardware failures upon resumed driving or during aftertreatment DPF stationary regeneration events. Extended idling periods should be limited to less than 24 hours in order to protect the aftertreatment system. However, for customers who idle their vehicles past the 24 hour limit, a periodic heat mode (known as Aftertreatment System Conditioning), was developed for the catalyzed aftertreatment system. Note: Aftertreatment system conditioning is NOT available on vehicles equipped with a non-catalyzed aftertreatment system. Aftertreatment system conditioning purges the DPF of accumulated hydrocarbons typically every 8 to 15 hours of extended idling time. The process is accomplished by elevating exhaust temperatures to approximately 100 to 200°C for 5 to 8 minutes, and by ramping up the engine between 1050 and 1400 RPM (dependent on engine model, ambient air temperature (AAT) and altitude). When aftertreatment system conditioning is active and the engine ramps up, a message will appear on the Co-Pilot® Display indicating that the cycle is active and no driver input is necessary. When the cycle is completed, the engine will ramp down to normal idling speed. Note: It is recommended that the aftertreatment system conditioning cycle not be interrupted while in progress. If possible, do not step on the throttle, release the park brake or move out of neutral until the cycle is completed (from 5 to 8 minutes).
