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On-Line Determination of Available Torque in Internal Combustion Engines
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English
Abstract
The flywheel speed is recorded during snap acceleration, while operating the engine without external load and at fully open throttle. A non-contacting magnetic sensor at the engine flywheel detects the instantaneous speed. A digital circuit, which includes a microprocessor, samples and processes the speed data. The speed increment observed over a fixed number of engine cycles is a measure of the engine torque. Since the instantaneous flywheel speed exhibits significant variations, the speed increment is determined on the basis of a linear regression analysis of the speed waveform. The approach was verified experimentally on eight-cylinder Diesel engines. The results from the snap acceleration analysis were found to be consistent with dynamometer measurements within mean relative error margins below four percent.
Authors
Citation
Mauer, G., "On-Line Determination of Available Torque in Internal Combustion Engines," SAE Technical Paper 910855, 1991, https://doi.org/10.4271/910855.Also In
References
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