Method for the cooling management of an engine system equipped with a partial exhaust gas recirculation device by means of a cooling circuit, comprising: a radiator device capable of lowering the temperature of a heat transfer fluid, an air heater device situated inside the passenger compartment, an engine that is in fluid communication with the air heater device in such a way as to form a first loop for the circulation of heat transfer fluid, a first fluid circulation means so arranged as to cause heat transfer fluid exiting from the radiator to circulate in the engine in such a way as to form a second loop for the circulation of heat transfer fluid, a heat exchanger of the partial exhaust gas recirculation device, intended to cool said partial exhaust gas recirculation device, and in fluid communication with the radiator, in such a way as to form a third loop for the circulation of the heat transfer fluid, a second fluid circulation means intended to cause heat transfer fluid exiting from the radiator to circulate in the heat exchanger of the partial exhaust gas recirculation device, a decoupling device so arranged, in a first mode, as to close the second loop in such a way as to permit the circulation of heat transfer fluid only in the first loop and the third loop, and, in a second mode, as to open the second loop in such a way as to obtain circulation of heat transfer fluid in the second and the third loops at the same time, the method involving: receiving at least one value of a parameter relating to the engine system (T M, status_EGR, pedal_pos, engine_speed), said at least one value of a parameter relating to the engine system comprising a temperature value (T M), comparing the temperature value with a threshold, formulating (202, 203, 204) a control signal for the third loop depending on said at least one received value, in such a way that if the temperature value (T M) is lower than the threshold, the control signal is formulated in such a way as to optimize the operation of the partial exhaust gas recirculation device, and if the temperature value (T M) is greater than the threshold, the control signal is formulated in such a way as to limit any rise in the temperature of the engine, by reducing the cooling of the partial exhaust gas recirculation device, and sending the control signal toward the third loop in order to adapt the cooling to the engine system situation. a radiator device capable of lowering the temperature of a heat transfer fluid, an air heater device situated inside the passenger compartment, an engine that is in fluid communication with the air heater device in such a way as to form a first loop for the circulation of heat transfer fluid, a first fluid circulation means so arranged as to cause heat transfer fluid exiting from the radiator to circulate in the engine in such a way as to form a second loop for the circulation of heat transfer fluid, a heat exchanger of the partial exhaust gas recirculation device, intended to cool said partial exhaust gas recirculation device, and in fluid communication with the radiator, in such a way as to form a third loop for the circulation of the heat transfer fluid, a second fluid circulation means intended to cause heat transfer fluid exiting from the radiator to circulate in the heat exchanger of the partial exhaust gas recirculation device, a decoupling device so arranged, in a first mode, as to close the second loop in such a way as to permit the circulation of heat transfer fluid only in the first loop and the third loop, and, in a second mode, as to open the second loop in such a way as to obtain circulation of heat transfer fluid in the second and the third loops at the same time, the method involving: receiving at least one value of a parameter relating to the engine system (T M, status_EGR, pedal_pos, engine_speed), said at least one value of a parameter relating to the engine system comprising a temperature value (T M), comparing the temperature value with a threshold, formulating (202, 203, 204) a control signal for the third loop depending on said at least one received value, in such a way that if the temperature value (T M) is lower than the threshold, the control signal is formulated in such a way as to optimize the operation of the partial exhaust gas recirculation device, and if the temperature value (T M) is greater than the threshold, the control signal is formulated in such a way as to limit any rise in the temperature of the engine, by reducing the cooling of the partial exhaust gas recirculation device, and receiving at least one value of a parameter relating to the engine system (T M, status_EGR, pedal_pos, engine_speed), said at least one value of a parameter relating to the engine system comprising a temperature value (T M), comparing the temperature value with a threshold, formulating (202, 203, 204) a control signal for the third loop depending on said at least one received value, in such a way that if the temperature value (T M) is lower than the threshold, the control signal is formulated in such a way as to optimize the operation of the partial exhaust gas recirculation device, and if the temperature value (T M) is greater than the threshold, the control signal is formulated in such a way as to limit any rise in the temperature of the engine, by reducing the cooling of the partial exhaust gas recirculation device, and sending the control signal toward the third loop in order to adapt the cooling to the engine system situation.