Digital timing light

Details Digital timing light Digital timing light

1986-04-30

1987-12-15

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

In situ testing of spark plug

73499, 324392, 324402, F02P 1700

Patent

active

047136170

ABSTRACT:
Engine timing apparatus includes a timing light and a pickup for producing a pickup signal in response to each ignition in a selected cylinder. The operator keys in the desired advance or retard angle in degrees in a range anywhere between +180.degree. and -180.degree.. A program-controlled microcontroller with an internaltimer samples the time period between pickup signals and, using this information and the advance of retard angle, calculates engine rpm and the proper time delay for the flash. The system automatically corrects for system delays to produce extremely accurate timing functions. The system may be used with an inductive pickup for timing gasoline engines or with a luminosity pickup for timing diesel engines. At high rpms the system produces a flash in response to every other pickup signal.

REFERENCES:
patent: 3364418 (1968-01-01), MacCrea
patent: 3955135 (1976-05-01), Fastaia
patent: 4095170 (1978-06-01), Schmitt
patent: 4117395 (1978-09-01), Redfield
patent: 4125894 (1978-11-01), Cashel et al.
patent: 4128005 (1978-12-01), Arnston et al.
patent: 4454475 (1984-06-01), Tsuchiya
patent: 4469952 (1984-09-01), Olson et al.
patent: 4472779 (1984-09-01), Marino et al.

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