Patent ID: 7634907
Filing Date: 2009-12-22
Classification: F01N,F02B,F02D,Y02T

Abstract:
1. A method for assisting in the regeneration of a depollution device associated with an oxidation catalyst and integrated in an exhaust line of a motor vehicle diesel engine, and in which the engine is associated with a common rail for feeding fuel to the cylinders of the engine and adapted, at constant torque, to implement a strategy of regeneration by injecting fuel into the cylinders in at least one post-injection, the method comprising: detecting a request for regeneration and thus for post-injection; detecting a stage during which the engine is idling; acquiring the temperature downstream from the oxidation catalyst; responding to said temperature by determining a maximum duration for the application of post-injections during a stage of idling; and progressively reducing the post-injections as soon as the duration of post-injection utilization has reached the predetermined maximum duration of application during this stage of idling.