Mazda 2006 Mazda5 Technical Information download pdf (Page 85)

2.0 MZR-CD Engine Emission System

• The DPF is a monolith made of silicon carbide ceramics, which features a high

resistance against temperature fluctuations. The individual channels of the filter have

porous dividing walls and are closed at alternative ends. As a result, the exhaust gas is

forced to flow through the dividing walls

, which retain the soot particles and allow

gaseous components to pass. The accumulation of particles in the filter increases the

filtration effect still further.

M5_01038

1 Cleaned exhaust gas 3 Exhaust gas from engine

ked w s erated at

ccum la d in the filter are burnt off. In addition,

the regeneration process reduces the exhaust gas back-pressure caused by the soot

amount accumulated, preventing an increase in fuel consumption.

NOTE:

2 DPF 4 Oxidation catalytic converter

• To avoid the DPF from becoming bloc ith oot particles it must be regen

regular intervals, i.e. the soot particles a u te

On vehicles with a higher mileage soot residues can often form on the exhaust

tailpipe. This is an inherent by-product of the regeneration process and should not be

considered a concern.

NOTE: Under certain conditions it is possible for white smoke to be emitted from the exhaust

tailpipe during regeneration. This is also a by-product of the regeneration proce

and should not be considered a concer

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Mazda 2006 Mazda5 Technical Information Page 85