METHOD AND DEVICE FOR ESTIMATING THE TEMPERATURE OF EXHAUST GASES ENTERING INTO A POST-TREATMENT SYSTEM ARRANGED DOWNSTREAM FROM A SYSTEM FOR THE TREATMENT OF SAID GASES

摘要

A method and device for estimating temperature of gases arising from internal combustion of an engine at the entrance to a system for post-treatment of the gases. The post-treatment system is downstream from a system for treatment of the gases, which may include a nitrogen oxide NO_x trap, an oxidation catalyst, or a 4-way catalyst. The systems connect to each other by a line, wherein the treatment system is considered as the whole of a whole finite number n of fictive elementary reactors R_i that are perfectly agitated and serially connected, wherein the total number n of fictive elementary reactors R_i is determined, in particular as a function of volume of the treatment system, and the fictive elementary reactors R_i are numbered from 1 to n in the gas flow direction along the treatment system. Fictive elementary reactor R_n is the last to be cross-flown by the gases before leaving the treatment system, and the temperature at the post-treatment system entrance downstream from the system for the treatment of the gases is calculated from the temperature inside the last fictive elementary reactor R_n.