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Methanol Concentration Smart Sensor
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English
Abstract
A Methanol Concentration Smart Sensor has been developed to support the demand for alternately fueled vehicles operating on blends of methanol and gasoline in any mixture up to 85% methanol.
The sensor measures concentration by exploiting the difference in dielectric properties between methanol and gasoline. The measurement is made based on the distributed capacitance of a coil of wire, contained in a reservoir through which the fuel passes. This signal, along with temperature compensation inputs, is then fed to an integral microprocessor, which provides a voltage output proportional to the methanol concentration of the fuel. The Powertrain Controller uses this information to modify injector pulse width and provide proper spark advance. This paper will explain the sensor's development methodology and function.
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Citation
Kopera, J., McMackin, M., and Rader, R., "Methanol Concentration Smart Sensor," SAE Technical Paper 930354, 1993, https://doi.org/10.4271/930354.Also In
References
- Suzuki H. Ogawa K. “Development of an Optical Fuel Composition Sensor” SAE Paper 910498 1991 SAE-SP-242
- Meitzler Allen H. Saloka George S. “Two Alternative, Dielectric-Effect, Flexible Fuel Sensors” SAE Paper 920699 1992 SAE-SP-903
- Schmitz G. Siedentop M. “Intelligent Alcohol Fuel Sensor” SAE Paper 900231 1990 SAE-SP-819
- Depa H. Kopera J. J. C. “Flexible Fuel Sensor System” Sept 29 1992
- Kopera J. J. C. “Method For Flexible Fuel Control” June 9 1992
- Kopera J. J. C. “Oscillator Having Resonator Coil Immersed In A Liquid Mixture To Determine Relative Amounts Of Two Liquids” Feb 25 1992
- Student Branch SAE Florida Institute of Technology “Methanol Innovation: Technical Details of the 1989 Methanol Marathon” SAE-SP-804