Apparatus for detecting alcohol concentration in a mixed fuel

Details Apparatus for detecting alcohol concentration in a mixed fuel Apparatus for detecting alcohol concentration in a mixed fuel

1994-03-11

1995-05-09

Regan, Maura K.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

331 65, 73 6144, 324682, G01R 2726, G01N 2700

Patent

active

054143675

ABSTRACT:
An apparatus for detecting the concentration of alcohol mixed with gasoline or light oil comprises a dielectric constant detection device for providing a resonance frequency corresponding to the dielectric constant of the mixed fuel; a device for detecting the resonance frequency provided by the dielectric constant detection device so as to output a first frequency signal having the same frequency as the resonance frequency; a frequency divider which divides the first frequency signal by a variable factor; a fuel temperature detector which outputs a second frequency signal representing the detected temperature; and a dividing factor decision device for determining the frequency dividing factor based on the first and second frequency signals. The alcohol concentration is determined by the output frequency of the frequency divider.

REFERENCES:
patent: 4112744 (1978-09-01), Tassano
patent: 4187462 (1980-02-01), Haker et al.
patent: 4468611 (1984-08-01), Tward
patent: 4470300 (1984-09-01), Kobayashi
patent: 5091704 (1992-02-01), Kopera
patent: 5134381 (1992-07-01), Schmitz et al.
patent: 5261276 (1993-11-01), Gonze et al.
patent: 5313168 (1994-05-01), Ogawa

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