An on-board sensor for percent alcohol

Ethanol additions to the Brazilian fuel supply are seasonal and regionally variable. Thus cars in Brazil must now function with gasoline/alcohol mixtures ranging in alcohol content from 0 percent to 30 percent. A sensor system is described which measures the on-board alcohol concentration so that ca...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 1978-08, Vol.27 (3), p.142-144
Main Authors: Hile, J.W., Rabe, P.R.
Format: Article
Language:English
Subjects:
Automotive engineering
Capacitance
Dielectric constant
Diesel engines
Ethanol
Fuels
Petroleum
Sensor systems
Sparks
Timing
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Summary:Ethanol additions to the Brazilian fuel supply are seasonal and regionally variable. Thus cars in Brazil must now function with gasoline/alcohol mixtures ranging in alcohol content from 0 percent to 30 percent. A sensor system is described which measures the on-board alcohol concentration so that carburetion and/or spark timing corrections can be made for optimal engine operation.
ISSN:0018-9545
1939-9359
DOI:10.1109/T-VT.1978.23736