Method and system for limiting the temperature at the exhaust of a diesel engine

摘要

The method involves elaborating a maximum admissible temperature setpoint at an exhaust of an oil engine, and determining a maximum richness (Rimax-cons) corresponding to the temperature setpoint by a cartography. A richness (Ri-mes) is measured from oxygen concentration of an exhaust gas by using an oxygen sensor. A gap is calculated between the maximum richness and the measured richness. A correction (Qinj-PC-corr) is applied on a fuel flow setpoint (Qinj-PC) of the engine if the measured richness is higher than the determined maximum richness.