Measuring and testing – Gas analysis – Gas of combustion
Patent
1998-09-10
2000-07-04
Larkin, Daniel S.
Measuring and testing
Gas analysis
Gas of combustion
G01N 27416
Patent
active
060821779
ABSTRACT:
An exhaust emissions analyzer for an automotive internal combustion engine has sensors for detecting constituents of the exhaust emissions, including a nitric oxide cell which receives the emissions and outputs an electrical signal indicative of nitric oxide in the emissions. An R-C circuit is interposed between the output of the nitric oxide cell and processing circuitry for enhancing the response time of the nitric oxide cell, reducing the rise and fall times of the cell output of signal. A temperature-responsive switching circuit disconnects the R-C enhancement circuit above a predetermined ambient temperature.
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Capiga Robert J.
Hoede Christiaan
Niazy Jeffrey W.
Larkin Daniel S.
Snap-on Tools Company
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