Delphi Technologies, Inc.

Peugeot Citroen Automobiles Sa

Delphi International Operations Luxembourg S.a.r.l.

Delphi Technologies Holding S.arl

Ludovic Peron

Guillaume Meissonnier

Claire Vermonet

Cédric Lorret

A method is provided for determining whether an injection parameter correction for fuel quality is required in an internal combustion engine, the engine comprising a plurality of cylinders, each one of the cylinders comprising a combustion chamber into which fuel is injected by an associated fuel injector and within which, in use, combustion events repeatedly occur to define a combustion cycle of the cylinder between successive combustion events. The method comprises observing the speed of the combustion cycles of at least two of the cylinders and analysing the at least two speeds to determine if an injection parameter correction for fuel quality is required. The invention also extends to an injector control unit arranged to determine an injection parameter correction for fuel quality.

System and method for control of an internal combustion engine

In the method of diagnosing the operating state of a motor vehicle diesel engine of the invention, the engine includes a pressure acquisition system associated with each cylinder of the engine to acquire the pressure in that cylinder, an engine shaft angle acquisition system adapted to deliver the crankshaft angle of each cylinder, and onboard correction system adapted to correct a predetermined set of malfunctions and drifts of the cylinders and the acquisition systems. The method includes an analysis step of analyzing the operation of each cylinder and the cylinder pressure and engine shaft angle acquisition systems by identifying an operating state of the set comprising that cylinder and those systems based on predetermined characteristics of the signal delivered by the cylinder pressure acquisition system, and a correction step of correcting identified malfunctions and drifts.

Method of diagnosing the operating state of a motor vehicle diesel engine

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Lailly en Val, France

Ludovic Peron