Method for controlling the amount of recirculated exhaust gas in an internal combusiton engine of a vehicle

The process involves controlling recirculated exhaust gas flow according to one of the following data such as a pressure (P2mes) in an inlet end casing (18), a pressure (P3mes) in the upstream of a turbine of a turbocharger (12), and a temperature (T3estim) of gas in the upstream of the turbine. The flow is controlled according to a ratio between the pressure (P2mes) and the pressure (P3mes). An independent claim is also included for a motor vehicle.