Digital dwell-tachometer with points resistance indication capab

Details Digital dwell-tachometer with points resistance indication capab Digital dwell-tachometer with points resistance indication capab

1977-05-09

1978-08-22

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 28CR, F02P 1700

Patent

active

041091957

ABSTRACT:
The present invention is a device to measure and display digitally the automotive engine parameters RPM (rotations per minute), dwell, and points resistance. The general approach taken is to establish a signal with a current controlled oscillator whose frequency is proportional to the above engine parameters. This signal is then processed by a digital counter whose count interval characteristics are determined by the number of cylinders in the automobile engine. The contents of the counter are converted to a digital format and displayed as an accurate representation of the parameters to be measured.

REFERENCES:
patent: 2335248 (1943-11-01), Hanson
patent: 3158804 (1964-11-01), Weissert
patent: 3886450 (1975-05-01), Trussell et al.
patent: 3961239 (1976-06-01), Lach
patent: 3986009 (1976-10-01), Fastaia

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