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 the temperature T_e of gases arising from the internal combustion of an engine (1) at the entrance to a system (12) for the post-treatment of said gases, wherein the post-treatment system (12) is arranged downstream from a system (10) for the treatment of said gases, said system (10) advantageously consisting of a nitrogen oxide NO_x trap, an oxidation catalyst, or a 4-way catalyst known in prior art. Said systems (10) and (12) are connected to each other by a line (11), wherein the treatment system (10) is considered as the whole of a whole finite number n of fictive elementary reactors R_i which 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 the volume of the treatment system (10) and the fictive elementary reactors R_i are numbered from 1 to n in the direction in which the gases flow along the treatment system (10), such that the fictive elementary reactor R_n is the last to be cross-flown by the gases before leaving the treatment system (10) and wherein the temperature T_e at the entrance to the post-treatment system (12) arranged downstream from the system for the treatment of said gases (10) is calculated from the temperature T_n inside the last fictive elementary reactor R_n.