Patent ID: 7726287

Claim:
A method for controlling at least one exhaust gas recirculation EGR valve during a start-up phase of a diesel engine of type including an external system for controlling combustion using EGR, implemented by a control device including a processing unit, the method comprising: the control device opening the EGR valve to a wide open position, for a short time measured from a moment starting of the engine is initiated and at least for a period over which the engine is started so that engine speed can be increased to an end-of-starting threshold speed; the control device gathering data representative of the engine speed and an ambient temperature, the data being supplied by sensors; dynamic calibration using the processing unit to determine an EGR valve openness setpoint as a function of the data supplied to the control device during the data gathering; and a progressive operation in which the control device partially closes the EGR valve in accordance with the openness setpoint determined during the dynamic calibration.