System for estimating the soot load of a particle filter

Abstract

This system for evaluating the soot load of a particle filter integrated in a diesel engine exhaust system of a motor vehicle comprises: storage means for storing a pre-established map of unit soot emission rates for each speed/load operating point of the engine; acquisition means for acquiring the current operating point of the engine in order to determine the corresponding unit soot emission rate; and accumulator means for accumulating the unit emission rates while the engine is in operation in order to determine the soot load of the particle filter.

1 . A system for evaluating the soot load of a particle filter integrated in a diesel engine exhaust line of a motor vehicle, the system comprising: 
 storage means for storing a pre-established map of unit soot emission rates for each speed/load operating point of the engine;    acquisition means for acquiring the current operating point of the engine in order to determine the corresponding unit soot emission rate;    corrector means for correcting the unit rate as determined in this way; and    accumulator means for accumulating the unit emission rates while the engine is in operation in order to determine the soot load of the particle filter.    
   
   
       2 . A system according to  claim 1 , wherein the corrector means comprise means for making a correction as a function of atmospheric pressure.  
   
   
       3 . A system according to  claim 1 , wherein the corrector means comprise means for making a correction as a function of the temperature of air in the environment of the vehicle.  
   
   
       4 . A system according to  claim 1 , wherein the corrector means comprise means for making a correction as a function of the temperature of the vehicle engine cooling liquid.