Volvo 9700 - Diesel Particulate Filter

Diesel particulate filter
The ceramic diesel particulate filter
(DPF) reduces the emission of soot
particles, hydrocarbons and carbon
monoxide.
General
Sulphur-free fuel (less than 10 ppm =
0.001% sulphur) must be used to ensure
correct function of the filter. Fuel with
higher sulphur content, or mixing other
fuels, can quickly destroy the particulate
filter.
Soot
The filter collects soot particles. Many
particles in the filter means a higher
exhaust back pressure. Which leads to
slightly higher fuel consumption and the
risk of unnecessary wear on the engine.
As a preventive measure, there is a
function that removes soot particles by
automatically burning them away. The
combustion process is called moving
regeneration and consists of burning the
particles by heating the particulate filter.
Ash
The particulate filter also filters inorganic
compounds (ash) from the exhaust
gases that originate from additives in the
engine oil. Ash is not removed in the
combustion process, why regular service
of the particulate filter is required. For
longer service intervals and optimum
function, engine oil with VDS-4 or
VDS-4.5 grade is recommended.
NOTE
Exhaust gases from buses with particulate
filter are still not healthy. Ensure good
ventilation.
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Fuel and emission control
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