US Patent: 6,082,177
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| Nitric Oxide Enhanced Response Circuit for Gas Analyzer
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Patentees:
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| Jeffrey W. Niazy (exact or similar names) - Lindenhurst, IL |
| Christiaan Hoede (exact or similar names) - EJ Diemen, Netherlands |
| Robert J. Capiga (exact or similar names) - Kenosha, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 10, 1998 |
| Granted: |
Jul. 04, 2000 |
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Stan Schulz
Snap-On Tools Company History
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Description: |
| Seyfarth, Shaw, Fairweather & Geraldson - patent attorneys
This application claims the benefit of U.S. provisional application Ser. No. 60/059,523, filed Sep. 22, 1997.
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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