SYSTEM FOR THE MAINTENANCE CONTROL OF A PARTICLE FILTER FITTED IN AN EXHAUST SYSTEM OF A MOTOR VEHICLE ENGINE

摘要

The ash volume from the engine lubricating oil and from the engine fuel feed are calculated. The useable volume (Vu) of the filter is calculated from the total volume of the filter when new (Vneuf) and the volumes of ash. The rate of fouling of the filter is calculated from the two volumes (Vneuf and Vu) and maintenance is requested when this exceeds a preset threshold (seuil) - System for helping with the maintenance of a particle filter integrated into the exhaust pipe of a vehicle's diesel engine, with means (1) of calculating the volume of ashes from the engine lubricating oil; means (2) of calculating the volume of ashes of the engine fuel feed; means (4) of calculating the useable volume (Vu) of the particle filter from a total volume of the filter when new (Vneuf) and the previously calculated volumes of ash, and means (5) of calculating a rate of fouling the particle filter (te) from the total volume (Vneuf) and the useable volume (Vu) to start a maintenance request (Req.maint) when the rate of fouling (te) exceeds a predetermined threshold (seuil). There are also means (3) of calculating the volume of residues from combustion of an additive designed to lower the combustion temperature of the particles trapped in the particle filter and mixed with the fuel fed to the engine and connected to the means (4) of calculating the useable volume. Further means (7) of calculating the kilometrage (Km maint) at which a maintenance operation is foreseen from the kilometrage run (Km par) by the vehicle since the new or cleaned filter and the rate of fouling. There are also means (8) of calculating the remaining kilometrage (km rest) before maintaining the particle filter, from the maintenance kilometrage and the kilometrage run.