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DPF Regeneration
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To prevent the DPF from clogging, the trapped particulates
are burned off and the filter is cleaned using
a high temperature (around 1000ºF in the Particulate
Filter) regeneration process that leaves a harmless ash as a
residue. There are two types of regeneration: Self-regeneration,
which is automatic when the exhaust gases are
high enough and Forced computer-initiated regeneration,
which is either automatic or manual.
In most instances, the regeneration will be done automatically as the truck is driven throughout the day and requires no involvement by the driver. However, if vehicle operation does not produce exhaust gases that are hot enough for automatic regeneration, a control light will indicate the need for regeneration and the driver may initiate the process by activating a switch on the dashboard. Regeneration requires managing and controlling much hotter exhaust gases than those experienced on current diesel-powered vehicles. By utilizing dual-wall air gap pipes, an insulated catalyst and DPF filter end cones, we are able to retain the heat within the exhaust system. Consequently, pipe and component exterior skin temperatures are not much higher during regeneration than they are today. Even though the filter is designed for long life, eventually the accumulated ash must be removed by special cleaning equipment at truck dealerships. To precisely control engine combustion and DPF regeneration, we have developed special system sensing and control software. Extensive calibration changes have also been made. |
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