118 ENGINE COMPONENT AND LOCATION
Manual Regeneration
A procedure called "Manual Regeneration" can be used to regenerate the filters while
they remain in the vehicle. The VCADS service tool or the Premium Tech Tool (PTT)
can be used to perform this function.
WARNING
The exhaust system reaches extremely high temperatures. Ensure that the system
components are clear of all combustible materials. Ensure that personnel are aware
that the surfaces are extremely hot. Failure to heed this warning may result in
severe personal injury and property damage.
Discharge Recirculation Valve
The Discharge Recirculation Valve (DRV) redirects some of the turbocharger output
back through the turbocharger. This results in elevated exhaust temperature.
The EECU uses this feature to maintain adequate exhaust temperature in support of
active regeneration in the DPF system.
Ultra Low Sulfur Diesel Fuel
A catalyst works better the higher the temperature up to about 400°C (750°F). Above
this temperature, sulfur can become sulfuric acid. These filtering systems are practical
only on vehicles that use ultra low sulfur fuels. It is required that diesel engines
operating in conjunction with a DPF system use ultra low sulfur fuel that contains 15
parts per million (ppm), or less, of sulfur.
Содержание EPA2007 D13F
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