Testing device for an oxygen sensor
First Claim
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1. An oxygen sensor testing device comprising:
- a plurality of gas supply sources individually storing various specific gas constituents of exhaust gas of an internal combustion engine;
means providing a gas passage supplied with said various specific gas constituents from said plurality of gas supply sources and capable of forming a synthetic gas corresponding to internal combustion engine exhaust gas;
an oxygen sensor connected to said synthetic gas passage and supplied with said synthetic gas from said synthetic gas passage;
a monitoring device for monitoring an output of said oxygen sensor; and
,individual metering devices disposed in individual connection passages connecting said individual gas supply sources and said synthetic gas passage;
one of said plurality of gas supply sources being a sulfur dioxide supply source to supply said synthetic gas and sulfur dioxide, and said synthetic gas being introduced into said oxygen sensor to test and evaluate said oxygen sensor.
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Abstract
An oxygen sensor testing device having an oxygen sensor disposed in a rear stage of a synthetic gas passage to evaluate the oxygen sensor using a synthetic gas supplied to the synthetic gas passage, in which a sulfur dioxide gas passage supplied with sulfur dioxide gas communicates with a front stage of the synthetic gas passage to supply sulfur dioxide gas to the synthetic gas passage, thereby enabling exact evaluation of the oxygen sensor using the synthetic gas having composition close to actual exhaust gas containing sulfur dioxide.
7 Citations
13 Claims
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1. An oxygen sensor testing device comprising:
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a plurality of gas supply sources individually storing various specific gas constituents of exhaust gas of an internal combustion engine; means providing a gas passage supplied with said various specific gas constituents from said plurality of gas supply sources and capable of forming a synthetic gas corresponding to internal combustion engine exhaust gas; an oxygen sensor connected to said synthetic gas passage and supplied with said synthetic gas from said synthetic gas passage; a monitoring device for monitoring an output of said oxygen sensor; and
,individual metering devices disposed in individual connection passages connecting said individual gas supply sources and said synthetic gas passage; one of said plurality of gas supply sources being a sulfur dioxide supply source to supply said synthetic gas and sulfur dioxide, and said synthetic gas being introduced into said oxygen sensor to test and evaluate said oxygen sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification