Mazda 13B-MSP Informations techniques télécharger pdf (Page 85)

Powertrain Engines

Diesel Particulate Filter System

• The DPF is a honeycomb structure with many channels closed off at alternate ends. The

soot particulates contained in the exhaust gas accumulate at the porous dividing walls,

while gaseous components such as CO and HC pass through the filter with no problem.

• To prevent the filter becoming blocked with soot particulates, it must be ‘regenerated’ at

certain intervals, i.e. the collected soot particulates are burnt off. In order to facilitate the

regeneration process, the channels of the DPF feature a catalytic coating that lowers the

temperature required to burn off the soot particulates.

L1001.4_01147

1 Soot 2 Catalytic coating

• Pressure and temperature sensors in the DPF detect when the soot accumulation

capacity of the filter is reached. Then the engine control system increases the exhaust

gas temperature by multiple fuel injections to burn off the particulates.

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Mazda 13B-MSP Informations techniques Page 85