Apparatus for determining the advance of a timing light

Details Apparatus for determining the advance of a timing light Apparatus for determining the advance of a timing light

1981-07-06

1983-11-22

Krawczewicz, Stanley T.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Ignition timing

F02P 1700

Patent

active

044172117

ABSTRACT:
A first pulse train is generated by a phase-locked loop circuit of which the frequency is adjustable to correspond to engine speeds of between 10 and 9,990 rpm. The pulse train is again divided to furnish a second pulse train for use in firing the timing light. A photoelectric sensor is responsive to flashes from the timing light. A D type flip-flop is coupled to the second pulse train and to the photoelectric sensor and generates an enable signal commencing with a pulse in the second pulse train and terminating with the sensor signal. A counter receives the first pulse train and is operative to count the pulses therein during the presence of the enable signal. A display depicts a number representative of the number of pulses counted by the counter.

REFERENCES:
patent: 3939397 (1976-02-01), Maisonville
patent: 4010414 (1977-03-01), Reeves et al.
patent: 4063152 (1977-12-01), Reeves
patent: 4070613 (1978-01-01), Brady
patent: 4095170 (1978-06-01), Schmitt

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