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Abstract

A method for synchronizing an internal combustion engine having at least one cylinder including a piston moving between a top and a bottom dead center, the movement driving a crank shaft and a cam shaft, the method including:

determining as many plausible hypotheses as there are reference teeth present on the target attached to the crank shaft in two crank shaft revolutions,detecting the passing of reference edges of a target attached to the crank shaft and of rising or falling edges of a target attached to the cam shaft,using the positioning of detected edges to eliminate one or more hypotheses made for the position of the top dead center of the cylinder at start up, by comparing the positioning of detected edges with a positioning of the edges corresponding to the determined hypotheses, and terminating synchronization when all hypotheses except one have been eliminated.

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First Claim