An electronic phase-lock loop system is described which acts as an FM demodulator to extract the combustion/compression acceleration/deceleration fluctuations in the angular crankshaft velocity from an optical encoder signal. Further processing can provide roughness detection with a second phase-lock loop, and other similarly useful engine control or diagnostic parameters.
PLL Sensing for Engine Diagnostics and Control
Sae Technical Papers
SAE International Congress and Exposition ; 1985
1985-02-01
Aufsatz (Konferenz)
Englisch
PLL Sensing for Engine Diagnostics and Control
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