초록 ▼

In apparatus for analyzing the exhaust gas of a motor vehicle, the apparatus including an oxygen sensor and means for sampling 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 ox

In apparatus for analyzing the exhaust gas of a motor vehicle, the apparatus including an oxygen sensor and means for sampling 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 from condensing on the sensitive area of the oxygen sensor, which moisture would interfere with the operation of the sensor.

대표청구항 ▼

In apparatus for analyzing the exhaust gas of a motor vehicle, said apparatus including a gas sensor and means for sampling a portion of said exhaust gas and conducting said portion to said sensor, the improvement wherein said conducting means comprises: first heat exchange means, said sensor being

In apparatus for analyzing the exhaust gas of a motor vehicle, said apparatus including a gas sensor and means for sampling a portion of said exhaust gas and conducting said portion to said sensor, the improvement wherein said conducting means comprises: first heat exchange means, said sensor being mounted on said first heat exchange means; first conduit means for conducting said exhaust gas portion to said first heat exchange means for heating same and said sensor mounted thereon; second heat exchange means for cooling exhaust gases; second conduit means for conducting said exhaust gas portion from said first heat exchange means to said second heat exchange means for cooling same; and third conduit means for conducting said cooled exhaust gas portion from said second heat exchange means to said sensor.