Renault S.a.s.

Bernard Dionnet

Marc Daneau

Stephane Cochet

Karim Guenounou

Laurent Leprieur

Marc Guyon

Philippe Aucouturier

Jean-Claude Mollet

Valerie Vayssie

Pierre Neyrat

Xavier Gruson

Philippe Pelletier

Hugues Albouy

Gabriel Col

Frédéric Aimard

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 of controlling elements used to execute the elementary functions of internal combustion engines. The method controls the elements using measurement signals provided by sensors, determines theoretical signals that have to be provided by reference sensors at a current operating point of the engine, determines deviations between the theoretical signals and the signals measured by the reference sensors, and establishes signal correction instructions for the elements according to the determined deviations.

Method of controlling elements used to execute elementary functions of an internal combustion engine

A method for controlling an internal combustion engine for regenerating an exhaust gas purifying mechanism arranged on an exhaust line of the engine during a phase of regeneration of the purifying mechanism. The method analyzes an exhaust gas composition solely downstream of the purifying mechanism and develops, based on the analysis, a control signal for the engine to modify an exhaust gas composition upstream of the purifying mechanism.

Method for controlling an internal combustion engine for regenerating exhaust gas purifying means and device therefor

The invention concerns a method for controlling the operating conditions of a probe () associated with means purifying () exhaust gases of an internal combustion engine (), which consists in comparing an output signal of the probe with a reference value, and in acting on the probe () to decrease a difference between the output signal (S) and the reference value.

Method for controlling the operation of a probe

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Morigny-Champigny, France

Bernard Dionnet