DPF is an
abbreviation for Diesel Particulate Filter and on some French manufacturer
vehicles it is also known as a FAP filtre à particules.
The particle filter
reduces the pollution emitted by diesel vehicles by filtering the solid
particles contained in the exhaust gases.
In time, the
particle filter becomes clogged by accumulation of the following
·Soot coming from the exhaust
·Cinders arising from the engine oil
·Particles coming from engine wear
When the filter
becomes clogged a regeneration or burn off is needed. Regeneration consists of
periodically burning off the particles accumulated in the particle filter.
Regeneration occurs naturally if the temperature of the exhaust gases is
sufficient or by the ECU, when engine operating conditions are correct, and by
injecting an additional post injection fuel spray, during the combustion
process, during valve overlap, the temperature of the exhaust gases increases
aiding the burn off.
As from the
factory, occasionally the filter cannot regenerate on its own and a forced
regeneration is required via a dealer level diagnostic tool. If a filter is to heavily loaded a replacement
filter must be fitted if not temperatures can get very high and could cause a
remaps will now alter the software in the ECU (Engine Control Unit) so that in
combination with physically removing the DPF, the vehicle will now run without
logging any error codes, attempting any future regenerations, or bringing any
DPF check lights or engine management light on the dash. For those of you who are not
aware the DPF does have to be physically removed, jut installing the software
will be of absolutely no benefit.