DIESEL PARTICULATE FILTER REGENERATION PROCESS OUTLINE[MZ-CD 1.6 (Y6)]

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High Power-Euro 4

• With the use of diesel particulate filter the remaining diesel particulate matter can be reduced by more than 99%. The collection capacity of the diesel particulate filter is limited. This means that the diesel particulates accumulated in the diesel particulate filter have to be removed periodically. This is done by burning off the diesel particulates at set intervals.

• A burn‐off of diesel particulates takes place chemically at a temperature of approximately 600 °C {1112 °F}. As the exhaust gas temperature during the approved European driving cycle rarely exceeds 270 °C {518 °F} due to the low engine load, measures have to be initiated to enable burn‐off of the diesel particulates.

• These measures are:

― Sustained increase in exhaust gas temperature.

― Lowering the oxidation temperature by using a fuel additive.

• The increased exhaust gas temperature is achieved by:

― Closing the intake throttle valve.

― Opening the air bypass (increasing the intake air temperature by bypassing the charge air cooler).

― Two post injections.

― Closing the EGR valve.

― Actuating the guide vanes of the turbocharger to deliver minimum boost pressure.

• A fuel additive (cerium) is used to lower the oxidation temperature. With the help of the fuel additive, the oxidation temperature is lowered to 450 °C {842 °F}.