System for assisting the regeneration of a particle filter integrated into an exhaust line of a motor vehicle diesel engine

A regeneration system comprising:

• a particle filter integrated into an exhaust line of a motor vehicle diesel engine;
• means for admitting air into the engine;
• means for recycling exhaust gas from the engine into an inlet of the engine;
• a turbocompressor;
• an oxidizing catalyst arranged upstream of the particle filter and in the exhaust line;
• means for commonly supplying fuel to the cylinders of the engine and including electrically controlled injectors associated with respective engine cylinders;
• means for adding, to the fuel, an additive to be deposited onto the particle filter in order to lower the combustion temperature of the particles trapped in the filter;
• means for acquiring information relating to various operating parameters of the engine and of preselected members linked to the engine;
• and
• means for monitoring the operation of the air admitting means, of the recycling means, of the turbocompressor, and the supply system in order to control the operation of the engine, the monitoring means triggering a regeneration phase of the particle filter by combustion of the particles trapped in the filter, at the same time initiating a phase of multiple injections of fuel into the cylinders of the engine during their expansion phase;
• the monitoring means further including
• a) means for determining the particle load of the filter, the determining means connected to a differential pressure sensor arranged at terminals of the particle filter and outputting information representing the overall load of the filter;
• b) means for estimating the residue load of the filter for material other than particles trapped in the filter;
• and
• c) means for calculating the total load of the particle filter, including the overall particle and residue loads.