Process for the determination of the exhaust gas temperature and

Details Process for the determination of the exhaust gas temperature and Process for the determination of the exhaust gas temperature and

1998-09-28

2000-07-11

Williams, Hezron

Measuring and testing

Gas analysis

Gas of combustion

123697, 429 33, G01N 700, F02D 4100, H01M 810

Patent

active

060855754

ABSTRACT:
According to the state of the art, either two separate sensor elements are generally used to determine the exhaust gas temperature and the air/fuel ratio, lambda, or the temperature and lambda readings are not taken simultaneously, at least at temperatures of less than 250.degree. C. In addition, sufficiently precise simultaneous measurement is only possible during stationary operation. The process according to the invention and the corresponding sensor arrangement now make it possible to obtain a precise temperature and lambda reading at a minimal degree of metrological complexity, especially under non-stationary conditions, in that a heated sensor, which exhibits a temperature-sensitive and oxygen-sensitive element on a carrier element, is used to measure the exhaust gas temperature, even at low temperatures with the heating system switched off, while a lambda reading is obtained simultaneously, with the latter being possible only at higher temperature ranges.

REFERENCES:
patent: 4007435 (1977-02-01), Tien
patent: 4407704 (1983-10-01), Mase et al.
patent: 4453397 (1984-06-01), Ohta et al.
patent: 4732128 (1988-03-01), Yoshioka et al.
patent: 5435172 (1995-07-01), Pelters et al.
patent: 5696313 (1997-12-01), Hafele

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