Patent ID: 7716923
Filing Date: 2010-05-18
Classification: F01N,F02B,F02D,Y02A

Abstract:
1. System for assisting the regeneration of depollution means associated with means forming oxidation catalyst implementing an OSC function, constituting an oxygen reserve and integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with these common rail means for the supply in fuel to the cylinders thereof, so that the depollution means comprises a particle filter regenerated by burning soot trapped therein using thermal energy provided by the engine and the oxidation catalyst, wherein said system comprises: means for determining the number of incomplete regenerations, wherein incomplete regenerations are partial regenerations and failed attempts at regeneration of the particle filter, and for comparing this number to predetermined threshold values, wherein the engine is driven in (i) first operation mode with lean mixture for a number lower than the threshold values or (ii) in a second operation mode implementing sequences of operation of the engine alternating operation phases with rich mixture and with lean mixture for a number higher than the threshold values.