Your DPF probably needs cleaning

Why clean your DPF Filter?

• Restricted DPF/DOC Reduces Mileage

• Meet EPA Standards

• Regular maintenance keeps the engine at Peak Performance.

• Reduces system regeneration

• Removes soot

• Increases Acceleration

Maintaining and Servicing Diesel Particulate Filters

Diesel particulate filters trap soot from the exhaust and ash from motor oil. Most soot is burned off in the course of a truck's operations, but ash stays in the filter's honeycomb substrate and is removed through periodic servicing.

Exhaust in highway trucks is usually hot enough to burn off most soot in a process called "passive regeneration." However, those involved in stop-and-go operations or that idle a lot don't get their exhaust hot enough. The latter must "actively" burn out soot from the substrate by injecting extra fuel just upstream of an oxygen catalyst or by plugging in an electric heater when parked. Active removal of soot through on-board regeneration can occur one or more times a day, depending on its type of operation, manufacturers say. Often it goes unnoticed by the driver, who may or may not see the indicator light in the instrument panel. But sometimes a warning gets more insistent through the light indicators and the driver must stop and initiate an active regeneration. Ash from motor oil stays in the filter's substrate and must be periodically blown or washed out. This is done by removing the DPF from the truck and placing it on a special machine. It sends compressed air through the substrate in a series of measured puffs. Detroit Diesel's filters are pressure-washed with de-ionized water, then dried.

(Information: August 2011, TruckingInfo.com - Featureby Tom Berg, Senior Editor, Senior Contributing Editor)

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