Steuerungsverfahren für die Steuerung der Einspritzung eines Verbrennungsmotors als Funktion der Krafstoffqualität

摘要

A control method for controlling injection of an engine (1) having an oxygen concentration sensor (10) generating a composition signal (S) as a function of the oxygen difference in the exhaust gases with respect to the stoichiometric condition of the burnt air/fuel mixture, and a number of injectors (12) for injecting fuel for an operating injection time (TJO) in each operating state of the engine (1), and each of which is assigned, in each operating state of the engine (1), a respective calibration injection time (TJC) determined at an initial engine calibration stage using a reference fuel. In a given operating state of the engine (1), the control method including the steps of: determining an intermediate injection time (TJM) as a function of a number (N) of operating injection times (TJO) of the injectors (12); calculating a current correction coefficient (KCN) as a function of the intermediate injection time (TJM) and of a reference injection time (TJR) determined at the initial engine calibration stage using the reference fuel; and determining an operating injection time (TJO) as a function of the calibration injection time (TJC) relative to the operating state of the engine (1), of a closed-loop injection time (TJS) depending on the composition signal (S), and of the current correction coefficient (KCN).