Mixing liquid ratio detector device

Details Mixing liquid ratio detector device Mixing liquid ratio detector device

1989-11-17

1990-10-16

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Having engine component position sensor

123117, 356436, F02P 900, F02B 7512, G01M 2100

Patent

active

049627465

ABSTRACT:
In a mixing liquid ratio detector device, a LED and a photo diode are provided in a manner to sandwich an optically permeable column. The light emitting area of the LED and the light receiving area of the photo diode are each arranged in the neighborhood of the column in generally perpendicular relationship with a boundary between a mixing liquid and the column, such that light beams from the LED enter the boundary through one side of the column, the light beams incident on the boundary at an angle more than a critical angle being totally reflected from the boundary, and advancing through an inner portion of the column to come out from the other side of the column, and impinging on the photo diode.

REFERENCES:
patent: 4116174 (1978-09-01), Schuchting
patent: 4770129 (1988-09-01), Miyata et al.
patent: 4794266 (1988-12-01), Saar
patent: 4821700 (1989-04-01), Webler et al.
patent: 4843248 (1989-06-01), Miyata et al.
patent: 4898462 (1990-02-01), Numata et al.
patent: 4905655 (1990-03-01), Mackawa

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