Renault S.a.s.

Deere + Company

Stephane Cochet

Bernard Dionnet

Curtis Paul Ritter

Joseph A Bell

Marc Daneau

Mark A Friedrich

Fabrice Gauvin

Laurent Leprieur

Pascal Barrillon

Marc Guyon

James Hugh Ross

Olivier Meurisse

Michael J Ryken

Jeffrey Hedberg

Brigham R Shamrell

Adam Wolf

Brian Eugene Holthaus

Karim Guenounou

Philippe Aucouturier

Jean-Claude Mollet

Zachary M Sharp

Jeffrey M Hedberg

Systems and methods are provided for a diagnostic system for a machine with a combustion engine and a variable geometry turbocharger that includes a vane position sensor. The diagnostic system includes a controller configured to calculate a learned span value of the turbocharger based on the output of the vane position sensor during a diagnostic procedure and a reference vane position sensor value. A plurality of learned span values are calculated each during a different one of a plurality of diagnostic procedures performed over a period of time and a first regression analysis to predict an expected learned span value at a defined future time using the calculated learned span value and the plurality of stored learned span values. An alert message is generated when the expected learned span value is indicative of a potential future fault of the turbocharger.

Variable geometry turbocharger prognostics

An internal combustion engine is associated with a remote load indicator which provides an output signal, corresponding to an impending increase in mechanical load. The internal combustion engine includes an air supply system and an electrical processing circuit. The electrical processing circuit is coupled with the load indicator and receives the output signal. The electrical processing circuit controls the air supply system to initiate an increase in an air supply to the internal combustion engine prior to the increase in mechanical load.

Internal combustion engine with power boost in response to impending load

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 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 relates to a method of estimating a nitrogen oxide mass stored in a catalytic nitrogen oxide trapping device () which comprises a catalytic phase and which is traversed by the exhaust gases () from the internal combustion engine () of a motor vehicle () comprising an electronic control unit (). The inventive method consists in: discretising the geometry of the catalytic trapping device () into several (n) perfectly-stirred, successive individual reactors (); and combining a thermal model, which can be used to calculate the temperature variation of the catalytic phase of the catalytic trapping device () during the traversing movement of the exhaust gases, and an absorption model, which can be used at any moment to calculate the nitrogen oxide mass stored in the catalytic trapping device () on the basis of the characteristics of said device (), the temperatures from the thermal model for each individual reactor and the exhaust gas mass flow from the engine ().

Method and device for estimating a nitrogen oxide mass stored in a catalytic trapping device of a motor vehicle

Growing community of inventors

Saint Jean de Braye, France

Stephane Cochet