Optical fast synchronization shaft position and speed sensor

Details Optical fast synchronization shaft position and speed sensor Optical fast synchronization shaft position and speed sensor

1988-05-20

1989-09-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

048662682

ABSTRACT:
A fiber optic detector head senses a light reflective or transmissive pattern on an encoder disk rotated by an engine shaft. The pattern results in three different light levels which are translated by a detector into an electrical pulse train having three different voltages. Patterns encoded into the single pulse train are decoded by a microprocessor to provide specific engine cylinder or cylinder pair position information even within the first spark firing period as well as engine speed information.

REFERENCES:
patent: 3418989 (1968-12-01), Silverman
patent: 3719177 (1973-03-01), Oishi et al.
patent: 3757755 (1973-09-01), Carner
patent: 4146001 (1979-05-01), McCarthy et al.
patent: 4263506 (1981-04-01), Epstein
patent: 4451731 (1984-05-01), Leonard
patent: 4604725 (1986-08-01), Davies et al.
patent: 4668862 (1987-05-01), Waibel
patent: 4678908 (1987-07-01), La Plante

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