Patent ID: 8515647

Claim:
A method for controlling the wastegate ( 16 ) in a internal combustion engine ( 1 ) turbocharged by means of a turbocharger ( 12 ); the control method comprises the steps of: determining an objective supercharging pressure (P obj ); measuring an actual supercharging pressure (P); determining a second closed loop contribution (WG CL1 ) of an objective position (WG obj ) of a controlling actuator ( 35 ) of the wastegate ( 16 ); determining a third adaptive contribution (WG A ) of the objective position (WG obj ) of the controlling actuator ( 35 ) of the wastegate ( 16 ); calculating the objective position (WG obj ) of the controlling actuator ( 35 ) of the wastegate ( 16 ) by adding the two contributions (WG OL , WG CL1 ); controlling the controlling actuator ( 35 ) of the wastegate ( 16 ), so as to pursue the objective position (WG obj ) of the controlling actuator ( 35 ) of the wastegate ( 16 ); determining, during a design phase, a control law (CL) which provides an objective opening of a controlling actuator ( 35 ) of the wastegate ( 16 ) according to the supercharging pressure (P); determining a first open loop contribution (WG OL ) of an objective position (WG obj ) of the controlling actuator ( 35 ) of the wastegate ( 16 ) through the control law (CL) and according to the objective supercharging pressure (P obj ); and calculating the objective position (WG obj ) of the controlling actuator ( 35 ) of the wastegate ( 16 ) by adding the three contributions (WG OL , WG CL1 , WG A ).