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Apparatus for determining the value of a cyclically varying parameter of an internal combustion engine

  • US 4,527,422 A
  • Filed: 06/15/1983
  • Issued: 07/09/1985
  • Est. Priority Date: 06/23/1982
  • Status: Expired due to Term
First Claim
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1. Apparatus for determing the average value of a parameter having a periodically or cyclically varying parameter component in a piston-type internal combustion engine (ICE) operating in cycles havingsensing means (12) for sensing an operating parameter of the engine and providin a varying sensed output signal representative of the cyclically varying parameter;

  • an output circuit (16);

    means (14) for providing a reading signal;

    and controlled switch means (13) controlled by said reading signal selectively connecting the sensing means (12) to the output circuit (16),wherein, in accordance with the invention,the means (14) for providing the reading signal is coupled to the crankshaft of the engine for providing, at each cycle of operation of the engine, a single reading signal,said signal providing means (14) furnishing said signal at a predetermined angular positon of the crankshaft of the engine with respect to a reference (TDC) position of a reference piston of the engine;

    and the output circuit (16) provides an output signal representative of the value of the time-average of the sensed signals and is coupled to the signal providing means (14).

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