Patent ID: 7367181
Filing Date: 2008-05-06
Classification: F02D

Abstract:
1. System for assisting the regeneration of a NOx trap integrated in an exhaust line of a heat engine of a motor vehicle, by switching the engine between operation in lean fuel/air mixture standard mode with a first parameter tuning set being used to control the operation of the engine in lean mode and operation in rich fuel/air mixture regeneration mode with a second parameter tuning set being used to cause the engine to operate in rich mode, said system comprising: means for measuring the temperature of the gases for supplying the engine, and means for correcting the tuning of at least one parameter among the parameters of the second parameter tuning set for controlling the operation of the engine in rich mode as a function of the measured temperature, in order to optimize a regeneration stage of the NOx trap, wherein said same correction is not applied to said at least one parameter in the first parameter tuning set for controlling the engine operation in lean mode, wherein the means for measuring the temperature comprise a sensor for sensing the temperature of the compressed air between a compressor of a turbocompressor and an air-intercooler, which are associated with the engine.