Index Jaguar Jaguar X-Type Sedan and Estate (Wagon) (2.0 L, 2.5 L and 3.0 L Gasoline; 2.0 L and 2.2 L, Diesel) - manual 2001-2009 year
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DPF control software incorporated into the engine control module (ECM) The DPF reduces the pollution generated by diesel vehicles by filtering soot particles out of the exhaust gases. The DPF is located in the exhaust system, downstream of the catalytic converter. A major feature of the DPF is its ability for regeneration. Regeneration is most important, since an overfilled filter can damage the engine through excessive exhaust back-pressure and can its self Item Part Number Description A - Front face showing alternate closed cells B - Side view showing exhaust gas flow through the filter and particulate build up C - Rear face showing alternate closed cells The DPF uses a filter technology based on a filter with a catalytic coating. The DPF is made from silicon carbide housed in a steel container The porous surface of the filter consists of hundreds of small parallel channels positioned in the longitudinal direction of the exhaust The collected particulate matter, if not removed, can create an obstruction to exhaust gas flow. The particles are removed by a regeneration Two processes are used to regenerate the DPF, passive and active. Passive Regeneration Passive regeneration requires no special engine management intervention and occurs during normal engine operation. The passive During passive regeneration, only a portion of the particulate matter is converted into carbon dioxide. This is due to the chemical reaction Above this temperature range the conversion efficiency of the particulates into carbon dioxide increases as the DPF temperature is raised. Active Regeneration Active regeneration starts when the particulate loading of the DPF reaches a threshold as monitored or determined by the DPF control Active regeneration generally occurs every 370 to 1250 miles (600 to 2000km) although this is dependant on how the vehicle is driven. For The DPF software incorporates an additional trigger, which is used as backup for active regeneration. If active regeneration has not been Active regeneration of the DPF is commenced when the temperature of the DPF is increased to the combustion temperature of the particles. Retarding the main injection timing Control of the post-injection is determined by the DPF software monitoring the signals from the two DPF temperature sensors to establish |