Sampling system for engine exhaust gas analysis apparatus

Details Sampling system for engine exhaust gas analysis apparatus Sampling system for engine exhaust gas analysis apparatus

G - Physics

01

N

73/100, 324/25

G01N 27/02 (2006.01) F02D 41/14 (2006.01) G01N 27/08 (2006.01) G01N 33/00 (2006.01) G01R 27/22 (2006.01)

Patent

CA 1063382

ABSTRACT OF THE DISCLOSURE In apparatus for analyzing the exhaust gas of a motor vehi- cle, the apparatus including an oxygen sensor and means for samp- ling a portion of the exhaust gas and conducting the sample to the sensor, there is disclosed an improvement wherein the exhaust gas is used to heat a moisture barrier and the oxygen sensor and is then cooled before being directed through the moisture barrier to the sensitive area of the oxygen sensor. This arrangement prevents moisture form condensing on the sensitive area of the oxygen sensor, which moisture would interfere with the operation of the sensor.

322541

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