Patent ID: 8082091

Claim:
A method for controlling a turbocharger associated with an internal combustion engine including a turbine, wherein a setpoint pressure corresponding to a fluid pressure in an intake manifold of the engine is determined, comprising: converting the setpoint pressure to a desired speed value; defining a physical relation associating a speed of the turbocharger to a ratio of a fluid pressure at an outlet of the turbine to a fluid pressure at an inlet of the turbine; calculating a desired ratio of the pressure in the turbine by applying the physical relation to the desired speed value; estimating a control law for a turbine actuator using a map of the turbine representing an evolution of a fluid flow rate flowing into the turbine as a function of a pressure ratio in the turbine, from a measurement of the fluid flow rate flowing into the turbine and from the desired pressure ratio in the turbine; and applying the control law to the turbine actuator so that pressure in the intake manifold is equal to the setpoint pressure.