Patent ID: 7694511
Filing Date: 2010-04-13
Classification: F01N,F02B,F02D,F02M,Y02A,Y02T

Abstract:
1. System for controlling the regeneration of depollution means integrated in an exhaust line of a motor vehicle engine, associated with common rail means for the supply of fuel, adapted to implement strategies for the regeneration of the depollution means, using post-injections of fuel into the cylinders of the engine, wherein different strategies provide different thermal levels in the exhaust line, each regeneration having a duration as a function of said strategies, wherein the higher the thermal levels in the exhaust line, the shorter the duration of the regeneration, wherein said system comprises further, for each regeneration: means for calculating a weighted cumulated time passed in the different regeneration strategies during said regeneration, wherein the weighted cumulated time is a sum of the weighted times passed in the different regeneration strategies during said regeneration, each of said weighed times passed in the different regeneration strategies being the respective time passed in the respective regeneration strategy weighted with a respective weighting coefficient, wherein the times passed in the different regeneration strategies are weighted with different weighting coefficients in calculating the weighted cumulated time during said regeneration, and means for comparing this weighted cumulated time with a set maximal threshold value for said regeneration, wherein (i) said regeneration is performed for said duration in the case where this threshold value has not been exceeded, and (ii) said regeneration is cut before an end of said duration in the case where this threshold value has been exceeded.