Patent ID: 7802422
Filing Date: 2010-09-28
Classification: B01D,F01N,F02B,F02D,Y02A,Y02T

Abstract:
1. Method of assisting the regeneration of depollution means associated with means forming oxidation catalyst and integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with common rail means for the supply of fuel to the cylinders of the engine, said method comprising: (a) shifting the engine, through modification of parameters for controlling the operation of the engine and by implementing post-injections of fuel into the cylinders thereof via the supply means, among four regeneration strategies of the depollution means, (b) detecting a request for regeneration of the depollution means and driving the supply means so as to start operation of the engine according to the level 1 strategy when a request for regeneration of the depollution means is detected, (c) monitoring the priming state of the means forming catalyst and starting the over-calibrated level 2 strategy when the means forming catalyst is primed, (d) acquiring the thermal level in the exhaust line and (i) starting the level 2 strategy of the engine when this thermal level is higher than a predetermined target temperature, during a first predetermined time period or (ii) cutting the regeneration if this temperature has not been reached before the expiration of a second predetermined maximal time period, and (e) monitoring the operation at level 2 of the engine and driving operation of the engine: