Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For oxygen or oxygen containing compound
Patent
1997-08-29
1999-11-02
Tung, T.
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For oxygen or oxygen containing compound
204401, 204402, 204425, 204426, 205775, G01N 27407
Patent
active
059763507
ABSTRACT:
A method of detecting an activated condition of a wide range air-fuel ratio sensor is provided. With this method, application of a current to a heater is started idiately after an engine is started (S00). Then, a current Icp for pumping is passed through an electromotive force cell (S10). A lapse of a predetermined time Tin is waited for (S18). After a lapse of time Tin, a voltage Vs across both electrodes of the electromotive force cell is detected (S20) and labeled as Vs0 (S22). Then, application of Icp is suspended (S30) and a routine is held on standby until a time of 25 ms elapses (S35). At the point of time when the time of 25 ms has elapsed, the voltage across the electrodes on the opposite sides of the electromotive force cell is detected (S40) and labeled as Vs1 (S45). A resistance value Rs1 is calculated from Vs0, Vs1 and Icp (S50). The resistance value Rs1 is compared with a value Rss which has been prepared previously (S55) and it is judged, when Rs1 is smaller than Rss, that the electromotive force cell has been put into an activated condition. An apparatus for detecting an activated condition of a wide range air-fuel ratio sensor is also provided.
REFERENCES:
patent: 4626338 (1986-12-01), Kondo et al.
patent: 5172677 (1992-12-01), Suzuki
patent: 5174885 (1992-12-01), Hayakawa et al.
patent: 5194135 (1993-03-01), Hayakawa et al.
patent: 5611909 (1997-03-01), Studer
Kawai Takeshi
Matsuoka Toshiya
Mori Shigeki
Oi Yuji
Teramoto Satoshi
NGK Spark Plug Co. Ltd.
Tung T.
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