United Technologies Corporation

Michael W Hmelovsky

Rinaldo R Tedeschi

Engine timing measurement apparatus receives the engine gear tooth signal, sensed combustion, and a crankshaft index (CI) of top dead center (TDC). The apparatus includes a whole tooth interval counter for providing a whole number count of each complete tooth interval, and partial tooth counters for counting incomplete tooth intervals as the ratio of clock pulses counted in a present incomplete tooth interval divided by clock pulses counted in a preceding complete tooth interval, the partial count added to the whole count to provide a decimal value indicative of engine timing.

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Windsor, CT, United States of America

Michael W Hmelovsky