194001660 - E5070 PARTICLE FILTER SYSTEM - DESCRIPTION
The DPF (Diesel Particulate Filter) is a system designed to keep down the level of particulates in the exhaust systems in diesel engines.The DPF system consists of:- the DPF filter;- sensors and actuators;- specific engine management control unit strategies.Since the filter is an accumulation system, it must be periodically regenerated (cleaned) by burning the particles present in the filter whose quantity is calculated using a control algorithm for the engine management control unit.The engine management control unit uses multiple injections to increase the temperature of the exhaust gases up to around 600°C to burn the particles.The regeneration of the filter takes place by brining the exhaust gases at the DPR intake to a temperature of >580°C and an O2 content > 5%.The engine management control unit controls the process acting on:- diesel metering (up to 5 injections in the same engine cycle per cylinder);- control of the air (EGR, supercharging pressure).The regeneration process lasts between 8 and 12 minutes depending on the type of vehicle and the level of blockage.During this stage the specific calibration of the engine guarantees that there is no discontinuity in the torque supplied in relation to normal operation therefore the customer should not be aware of anything and the regeneration stage should be kept activated in all engine operating conditions.The instrument panel provides the information necessary for the management of the filter regeneration process by means of warning lights and messages.The general failure warning light and/or message in the display indicate the need to carry out a driving cycle to allow the system to carry out the regeneration.When the condition of the oil is poor, the insufficient engine oil pressure warning light is activated and flashes and, together with the acoustic signal, the messagae "Change the engine oil" is shown in the display. | The engine oil change should be carried out by the Service Network. |
 | Changing the oil should be followed by resetting the parameter that designated the quantity of the switching off of the warning light in the Instrument Panel. |