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CARDIFF-A Calibration Method for Mechanical Dynamometers
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English
Abstract
A new method, CARDIFF, has been developed for calibrating chassis dynamometers. This method is based upon the determination of the frictional losses attributable to each inertia flywheel of the dynamometer system. Frictional losses for any inertia combination are found by the summation of individual flywheel contributions. The dynamometer load setting, which is critical for emissions and fuel economy testing, is simply obtained by subtracting these losses from the required actual horsepower.
This method increases testing efficiency by reducing the calibration time by approximately 75% as compared to the generic procedure defined in the Federal Register.
Authors
Citation
Rauker, Z., "CARDIFF-A Calibration Method for Mechanical Dynamometers," SAE Technical Paper 810279, 1981, https://doi.org/10.4271/810279.Also In
References
- Clayton Operation and Installation Manual for Emissions Dynamometer Systems, Clayton Manufacturing Company El Monte California, U.S.A. Manual R-8713, Copyright 1976
- Paulsell D. Keller J. “Recommended Procedure for the Calibration of Clayton Dynamometers,” Division of Program Management Mobile Source Air Pollution Control, Office of Air and Waste Management, Environmental Protection Agency, Ann Arbor Michigan November 1977
- Federal Register, Section 86.177-11 June 1977
- Malik M. I. Niewierski W. J. Yakas J. T. “Microprocessor Applications in Vehicle Emissions Testing,” presented at the SAE Winter Meeting Detroit, Michigan February 23 27 1981