Exhaust gas temperature measuring system utilizing existing oxyg

Details Exhaust gas temperature measuring system utilizing existing oxyg Exhaust gas temperature measuring system utilizing existing oxyg

1992-05-11

1993-06-15

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

374142, 73116, 324713, G01K 716, G01K 1302, G01R 2702

Patent

active

052192288

ABSTRACT:
An exhaust gas temperature measuring system for an internal combustion engine derives temperature from an oxygen sensor having a temperature dependent internal resistance disposed in an exhaust gas stream. The oxygen sensor produces an intrinsic voltage which is divided between the internal resistance and an external resistive load. An approximation of the oxygen sensor internal resistance is made from the value of the resistive load providing a value of the loaded sensor voltage having a predetermined relationship to the unloaded sensor voltage; and the internal resistance indicates the exhaust gas temperature.

REFERENCES:
patent: 4078531 (1978-03-01), Hewitt
patent: 4149408 (1979-04-01), Ezoe et al.
patent: 4519237 (1985-05-01), Kubo
patent: 4742808 (1988-05-01), Blumel et al.
patent: 4768485 (1988-09-01), Brandner et al.
patent: 5091698 (1992-02-01), Grabs
patent: 5129258 (1992-07-01), Homeyer

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