Method for controlling a supercharged diesel engine with low-pressure exhaust gas recirculation

The method involves measuring a temperature representing a temperature (T21) of intake manifold during an operation mode of engine with ratio greater than or equal to 1 by using predefined adjustment cartography, where the mode corresponds to a regeneration phase of nitrogen oxide trap. The cartography is modified when the measurement temperature goes below a preset minimal temperature threshold. Phasing of pilot injection is decreased and a flow of pilot injection fuel is increased if the measured temperature is below the threshold during the modification of the cartography.