Process for measuring the oxygen content in the exhaust of inter

Chemistry: electrical and wave energy – Processes and products

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204424, 204427, 60276, G01N 2746

Patent

active

047523611

ABSTRACT:
In this method, the oxygen content in the exhaust is measured relative to the oxygen content of the air by means of a lambda probe (7). To eliminate the influence of pressure variations in the exhaust system (3) of the internal-combustion engine (1) on the measurement, according to the invention an amount of exhaust sample is taken from the exhaust system (3) and not fed to the air pressure of the lambda probe (7) until it has been expanded.

REFERENCES:
patent: 3598711 (1971-08-01), Flais
patent: 3616274 (1971-10-01), Eddy
patent: 3869370 (1975-03-01), Sayles
patent: 3907657 (1975-09-01), Heijne et al.
patent: 4206173 (1980-06-01), Yamaguchi et al.
patent: 4257746 (1981-03-01), Wells
patent: 4263883 (1981-04-01), Treible et al.
patent: 4368431 (1983-01-01), Rohr et al.

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