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Development of an On-Line Exhaust Gas Data Reduction System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1967 by SAE International in United States
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This paper discusses data reduction systems for use at exhaust emission test facilities. An investigation of ways and means of automatically reducing the large volumes of data generated in exhaust emission testing is discussed. Four distinct data reduction methods were considered and evaluated. The investigation resulted in the specification and purchase of an on-line data reduction system for use at several of the General Motors test facilities.
Specifically, a system was developed to reduce data collected according to the California Exhaust Emission schedule. Data reduction is accomplished by electronic analog computation with digital control and output. Gas analyzers convert the hydrocarbon, carbon monoxide, and carbon dioxide composition of exhaust gas into analogous electrical signals. There are averaged by time scaled integration at specific times during the driving cycle. At the end of a given time the electrical analog data is operated on according to a specified equation. The accumulation of data during the schedule provides the information used for the final average values of HC and CO. The results are displayed on a chart recorder or digitized and typed on a report.
CitationCobb, R. and Perna, F., "Development of an On-Line Exhaust Gas Data Reduction System," SAE Technical Paper 670164, 1967, https://doi.org/10.4271/670164.
- “California Procedure For Testing Motor Vehicle Exhaust Emission.” State of California Motor Vehicle Pollution Control Board. Rev Nov. 17 1965
- “Control of Air Pollution From New Motor Vehicles and New Motor Vehicle Engines.” Federal Register 31 61 March 30 1966
- Stebar R. F. Cianciola M. J. Ward F. M. Brownson D. A. “Digital Data Acquisition and Computer Data Reduction for the California Exhaust Emission Test.” Paper 660406 presented at SAE Mid-Year Meeting, Detroit June 1966