Selbstadaptierende Steuermethode für eine Einspritzeinheit einer Brennkraftmaschine

A self-adapting method for controlling titre for an internal combustion engine (2) provided with a first and a second sensor of stoichiometric composition (5, 6) disposed respectively upstream and downstream of a system for reducing pollutant emissions (4) and generating respective upstream and downstream composition signals (V1, V2). The method comprises the stages of determining a correction coefficient (KO2) as a function of the upstream composition signal (V1), the downstream composition signal (V2) and an objective signal (V DEG ) indicative of an objective exhaust titre, determining an operating quantity of fuel (QF) to be injected into each cylinder of the engine (2) as a function of the correction coefficient (KO2), memorising a plurality of current values (VAC(i, j)) of an adaptation signal (VA) each associated with a respective combination of values of the number of revolutions (RPM) and the load (L) of the engine (2), updating the current values (VAC(i, j)) as a function of the downstream composition signal (V2), on each engine cycle, selecting one current value (VAC(i, j)) corresponding to the number of revolutions (RPM) and the load (L) of the engine (2) in this engine cycle, generating the adaptation signal (VA) as a function of the current value (VAC(i, j)) selected and determining the correction coefficient (KO2) also as a function of the adaptation signal (VA).