Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1991-08-15
1993-11-16
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 5301, 123 1A, 123494, 324663, 324685, G01N 2722, G01N 3322, F02M 5100, F02M 700
Patent
active
052612708
ABSTRACT:
A motor vehicle fuel composition sensor is responsive to a dielectric constant of a mixture of two fuels such as gasoline and methanol to indicate the relative concentrations of each. The sensor is fuel temperature dependent at high concentrations of methanol; and a fuel temperature sensor thus provides a fuel temperature signal for fuel composition signal correction. Diagnostic apparatus stores references defining permissible operating ranges for the fuel temperature and fuel composition sensor outputs and compares the sensor outputs with these ranges to detect abnormal sensor operation. The reference defining the end of the fuel composition sensor range at maximum methanol, however, is corrected for fuel temperature if the fuel temperature sensor output is within range. An out of range signal from either sensor causes a default value to be substituted for fuel composition.
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Schmitz et al, "Intelligent Alcohol Fuel Sensor", SAE Paper No. 900231, Society of Automotive Engineers, 1990.
Chu Larissa C.
Gonze Eugene V.
Orminski John K.
Delco Electronics Corporation
Dombroske George M.
General Motors Corporation
General Motors of Canada Ltd.
Sigler Robert M.
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