| 摘要 |
The control arrangement (8) comprises an oxygen linear test sensor (1) located along the exhaust duct (2) of an internal combustion engine (3), the sensor (1) having a chamber (13) able to receive part of the exhaust gas and two electrolytic cells (11, 12) of which one (11) is electrically piloted; the arrangement (8) having a retro-operation test circuit (16, 17, 18, 19, 21, 22) able to adjust the current (Ip) piloted to the cell (11) to give rise to an oxygen ions draining mechanism from and/or towards the chamber (13) which induces the stoichiometric condition within the chamber (13) itself, and an outlet circuit (23) able to convert the piloted current (Ip) into a first signal (Vout1) representative of nature ( lambda m) of the mixture fed to the engine (3); the arrangement (8) being provided with a memory circuit (27) which memorises the value (Rcomp) of a compensation resistance (25) of the eventual spreads of the piloted current (Ip) of a correcting circuit (31, 32) receiving the stored value (Rcomp) of the compensation resistance (25) and able to ensure a correction for the first signal (Vout1) to recover the spreads of piloted current (Ip) to the cell (11); the correcting circuit (31, 32) providing an outlet signal (Vout) effectively representative of the nature ( lambda m) and independent of the variations in compensation resistance (25). <IMAGE> |
