Renault S.a.s.

Marc Guyon

Erwan Radenac

Stephane Cochet

Laurent Leprieur

Bernard Dionnet

Karim Guenounou

Manuel Da-Silva

A regeneration control method for a particle filter of an internal combustion engine exhaust line determines operating data items of the particle filter, wherein the data items are at least one representative inside temperature T(t) of the filter at a time t, regenerates the filter by increasing the temperature thereof above a first combustion temperature threshold of a soot contained in the filter, and computes a time-varying parameter d(t) representative for the amount of energy produced at the time t by the regeneration process. The method further calculates a weighted parameter Dweight(t), which is at least partially defined by the function of d(t)*Gtemp (t) or Gtemp (t) and varying in time (t) according to the representative temperature T(t).

Regeneration control method for a particle filter

The invention concerns a method which consists in arranging a oxygen probe () of an exhaust pipe and observing that substantial unique increase of said representative signal towards a threshold value Scalculated from the start of the bleeding of the nitrogen oxide trap, obtained following a variation subsequent to shift of the engine from lean mixture operating conditions to rich mixture operating conditions, being used as indicator for controlling the end of the bleeding operation. The invention is characterized in that the integration of the signal representing the time between the start of the bleeding and the end of the bleeding, then the comparison of the integration value to a threshold value Sare used for diagnosing its ageing condition. The invention also concerns a device for implementing said method.

Method and device for managing the operation of a nitrogen oxide trap, and diagnosing its ageing condition

A method for regenerating a motor vehicle particle filter that uses a mechanism for regenerating the filter when a load value exceeds a predetermined threshold. Further, a parameter representing operating conditions of the regenerating mechanism is calculated, and the operating conditions of the regenerating mechanism are controlled on the basis of the parameter.

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La Norville, France

Marc Guyon