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A Non–Contacting Torque Sensor for the Internal Combustion Engine
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English
Abstract
This paper discusses an inexpensive, non-contacting sensor for the measurement of the quasi-average torque of an internal combustion engine. The quantity which is actually measured by this sensor is a low-pass filter transformation of instantaneous developed torque having a bandwidth of about 9Hz. This method of torque measurement uses an inexpensive sensor which directly measures instantaneous crankshaft angular velocity. Electronic signal processing generates a signal which is proportional to instantaneous crankshaft angular acceleration.
The relationship between engine developed torque and various transformations of this acceleration have been experimentally studied. This paper shows that certain of these transformations are highly correlated with the desired torque signal under transient as well as steady state operation. Transient operations which have been studied include changes in throttle position.
The paper explains the sensor concept in terms of specific mathematical models for the torque and engine dynamics.
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Topic
Citation
Ribbens, W., "A Non–Contacting Torque Sensor for the Internal Combustion Engine," SAE Technical Paper 810155, 1981, https://doi.org/10.4271/810155.Also In
References
- Harada K. Sakamoto H. “A New Torque Transducer with Permanent Magnetics and a Ring Core” IEEE Transom Magnetics 12 6 807 808 Nov. 1976
- Pratt G. W. “An Opto-Electronic Torque-meter for Engine Control” SAE Preprint 760070 Feb 23-27 1976
- “Piezoelectric Sensor Determines Cylinder Pressure” Automotive Eng. 87 5 63 65 May 1979
- Avramidis S. A. “Measurement of Automotive Timing Chain Drive Loads” SAE Paper N741046 Oct 21-25 1974
- Randall K. W. Powell J. D. “Electronic Spark Timing Control for Motor Vehicles” SAE Paper 790139
- Binder K. Kiencke U. Zechnall M. “Car Control by a Central Electronic System” SAE Paper 770001
- Kvamme E. F. Crowley J. R. “Microprocessors in the Automobile” SAE Paper 770004
- Truxal J. G. Control System Synthesis McGraw Hill N.Y., N.Y.