Sensor for mixing ratio of gasoline and alcohol

Details Sensor for mixing ratio of gasoline and alcohol Sensor for mixing ratio of gasoline and alcohol

1987-05-01

1988-09-13

Cross, E. Rollins

Internal-combustion engines

Miscellaneous

Fuels, lubricants and additives

423494, F02B 7500

Patent

active

047701293

ABSTRACT:
A sensor for mixing ratio of gasoline and alcohol comprising: a transparent column, both ends of which are supported by grips; the surface of the column is positioned in direct contact with a mixing liquid of gasoline and alcohol; a light emitting diode disposed so that light beams therefrom are incident on one end of said transparent column and the mixing liquid, said beams incident on said boundary at less than a critical angle being totally refracted, while said beams incident on said boundary at more than the critical angle being totally reflected to pass within said column so as to go out from the other end thereof, said critical angle depending upon a mixing degree of said liquid; a photo diode placed to receive the light beams reflected from the boundary so as to generate an output in accordance with the quantity of the light beams received; and the column being substantially determined its lengthwise and diametrical dimension such that the light beams incident upon the boundary at a critical angle, are allowed to totally reflect only once to enter the photo diode with the mixing ratio of alcohol and gasoline ranging from 100:0 to 0:100.

REFERENCES:
patent: 4541272 (1985-09-01), Bause
patent: 4594968 (1986-06-01), Degobert et al.

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