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Experimental Road Test of a Noncontacting Method of Measuring I-C Engine Torque Nonuniformity
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English
Abstract
This paper presents the experimental results of measurement of the nonuniformity in diesel engine torque. Measurements were made for an engine driving a water brake dynamometer as well as for a diesel engine (with a manual transmission) in an actual vehicle on roads of varying surface quality. These nonuniformity measurements are a measure of engine performance and have potential application in electronic engine control, maintenance/diagnostic functions and can serve as an indicator of incipient failure of the engine or of certain components.
The instrumentation includes a noncontacting (magnetic field system) sensor which can be mounted on the engine with minimal modification. The computation of the nonuniformity index can be implemented with an 8-bit or 1-6-bit microcomputer
This paper presents the theory of the method, explains the necessary instrumentation, and gives results of the experimental study.
Authors
Citation
Ribbens, W., "Experimental Road Test of a Noncontacting Method of Measuring I-C Engine Torque Nonuniformity," SAE Technical Paper 850454, 1985, https://doi.org/10.4271/850454.Also In
References
- “A New Metric for Torque Nonuniformity,” Ribbens, W. B. SAE Intl. Congress & Exposition Cobo Hall Detroit, Mich. Feb. 28 Mar. 4 1983 SAE 830425
- “A Noncontacting Torque Sensor for the Internal Combustion Engine,” Ribbens, W. B. SAE Intl. Congress & Exposition Cobo Hall Detroit, Mich. Feb. 23-27 1981 SAE 810155
- “An On-Line Engine Roughness Measurement Technique,” Milhelc, W. P. Citron, S. T. SAE Intl. Congress & Exposition Cobo Hall Detroit, Mich. Feb. 22 Mar. 2 1984 SAE 840136