| 摘要 |
Control method for an oxygen linear sensor, in which the sensor (1) is located along an exhaust duct (2) of an internal combustion engine (3) to receive into a separate chamber (4) part of the exhaust gas and generate a first signal (Vd) representative of the swing between the composition of the gases in the chamber (13) and a reference stoichiometric composition; the first signal (Vd) being processed by a retroactive circuit (15, 17, 19, 22) which pilots an electrical current Ip into the sensor (1) in such a manner as to generate an oxygen ion draining mechanism from and towards the chamber (13) and to cancel the swing; the current (Ip) being converted into an output signal (Voutm) which saving an error due to current spreads (Ip), is proportional to the quantity of oxygen present in the exhaust gases; the method presenting the calculation phase (100, 110, 120) of a correction parameter (Kcorr) which is applied to the output signal (Voutm) to make it effectively proportional to the quantity of oxygen present in the exhaust gases; the calculation of the parameter (Kcorr) being effected with the sensor (1) located in a controlled atmosphere by means of processing of the output signal (Voutm) and of a nominal voltage (Vnom) defining the theoretical value of the output signal (Voutm) in the presence of the said controlled atmosphere. <IMAGE> <IMAGE> |
