Method for controlling the titre of the air-fuel mixture in an internal combustion engine

摘要

A method for controlling the titre of the air-fuel mixture in an internal combustion engine provided with at least two cylinders, in which the exhaust gas present in a common exhaust manifold is analyzed in order to measure at least two successive values of the overall air-fuel ratio of the cylinders; a value of the air-fuel ratio of a final combusted cylinder being estimated by carrying out a linear composition of the two successive values of the overall air-fuel ratio of the cylinders and the value of the air-fuel ratio of the final combusted cylinder being attributed to a first of the cylinders and being used to correct a titer of the air-fuel mixture introduced into the first cylinder.