Method and system for controlling the engine torque of an internal combustion engine

A method for controlling the engine torque of an internal combustion engine, said engine comprising:

• a crankshaft, characterized by a top dead center,
• at least one system (110) for regulating an air flow entering the engine, said system comprising a movable control member whose position makes it possible to act on the air flow entering the engine, and
• an ignition system (130) with a system (150) for determining the ignition angle, defining the angle of the crankshaft with respect to the top dead center of said crankshaft at the time of ignition of the engine, in which method:
• a. on the basis of a torque demand (TQ_REQ) of a user of said engine, an air flow setpoint value (MAF_SP) is determined,
• b. on the basis of the air flow setpoint value (MAF_SP), a position setpoint value (TPS_SP) of the movable control member of the regulating system (110) is determined,
• c. the air flow (MAF) entering the engine and the position of the movable control member (TPS) are measured, and
• d. on the basis of the determined torque demand (TQ_REQ) and of the measured entering air flow (MAF), on the one hand, a quantity of fuel to be injected (QTF), and, on the other hand, an ignition angle (IGN_ANG) are determined,
• the method being characterized in that:
• the quantity of fuel to be injected (QTF) is calculated on the basis of the measured entering air flow (MAF), and
• the ignition angle (IGN_ANG) is calculated on the basis:
• of the measured entering air flow (MAF) if the difference between the measured position of the movable control member (TPS) and the setpoint value of the position of the movable control member (TPS_SP) is greater than a predetermined position difference (EPS), and
• of the setpoint value of the entering air flow (MAF_SP) if the difference between the measured position of the movable control member (TPS) and the setpoint value of the position of the movable control member (TPS_SP) is less than said predetermined position difference (EPS).