Mazda 6 Facelift 2005, Training Manual

Page: 74 / 274

Diesel Engines Engine
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In comparison to the particulate matter limit for Euro 3 vehicles (0.05 g/km), the limit for
Euro 4 vehicles (0.025 g/km) has been lowered by 50 %. In order to comply with the
strict Euro 4 emission legislation, the Mazda6 with 2.0 MZR-CD engine is equipped with
a diesel particulate filter system.
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The following sample calculation shows the benefit of a diesel particulate filter: A modern
Common Rail diesel engine without diesel particulate filter has emitted on average about
3 kg of soot after 80.000 km. With a filter it would have emitted less than 100 g over the
same distance, which is a reduction of 95 %.
Diesel Particulate Filter
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The oxidation catalytic converter and the DPF are located one behind another in a
combined housing.
M5_01037
1 Oxidation catalytic converter and DPF 5 Exhaust gas temperature sensor (upper)
2 Heated oxygen sensor 6 Connection for reference pressure
3 Exhaust gas temperature sensor (lower) 7 Connection for high pressure
4 Exhaust gas temperature sensor (middle)
NOTE: To ensure proper function of the DPF system only mineral diesel fuel with a
maximum sulphur proportion of 350 ppm according to DIN EN 590 must be used.
The use of fuel with a higher sulphur proportion is strictly forbidden as this can lead
to blockage of the DPF.
NOTE: Mixing of any additives with metallic compounds to the diesel fuel (e.g. valve cleaner,
coldstart accelerator) is strictly forbidden since this leads to an increased ash
formation, resulting in a blocked DPF.
01-60 Service Training Mazda6 Facelift