Hardi ALPHA EVO EcoDrive 5100 Instruction Book page 58

3 - Description
Diesel particles filter
The combustion of diesel fuel results in soot, which is separated in the diesel particle filter. This must be regene rated as the
contamination with soot increases. That means that the soot in the diese l par ticle filter is burned. The regener ation is based
on a continuous regeneration process, which is activated as soon as the exhaust temperature of 250 °C is e xceeded at the
inlet of the exhaust gas after-treatment system. The filter contamination with soot is monitored continuously by the engine
control unit.
Regeneration
The passive par ticle filter system burns the soot in the filter with the nitroge n oxides in the exhaust which are oxidised in the
DOC before hand. This process runs continuously once the exhaust tempe rature has excee ded 2 50°C. The passive particle
filter system does not contain a burner. A prere quisite for the passive continuous re generation is having a sufficient ratio of
nitrogen oxides to soot in the raw exhaust gas of the engine.
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