Combustion timing method and apparatus with direct TDC detection

摘要: Method and apparatus for timing combustion events in the chamber of an internal engine wherein a piezoelectric transducer is utilized to develop signal corresponding first derivative pressure within cylinder being monitored. A processing circuit detects that change polarity which occurs at transition between compression expansion volume during cycle piston. Circuitry provided effectively disregarding all other changes or "zero crossings" output are not related achievement top dead center position by piston cylinder. This directly derived indication from combined with signals monitoring controlling injection ignition engine.