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Spark ignited internal combustion engine and a control system therefor

  • US 5,029,565 A
  • Filed: 04/09/1990
  • Issued: 07/09/1991
  • Est. Priority Date: 05/05/1989
  • Status: Expired due to Fees
First Claim
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1. A spark ignited internal combustion engine having at least one inlet tract and a control system therefore, the control system comprising an engine electronic control unit, an optical knock sensor located in at least one inlet tract of the engine to sense, at least during part of the induction stroke, the radiation passing by an inlet valve means associated with that inlet tract and to supply a signal indicative of the sensed temperature to the electronic control unit and an ignition system including at least one spark plug, a high voltage supply unit to supply a high voltage to each spark plug in response to a control signal from the electronic control unit, and a crankshaft transducer means to supply signals indicative of the speed and rotational position of a crankshaft of the engine to the electronic control unit wherein the electronic control unit adjusts the ignition timing of the engine by varying the control signal in response to the signals received from the optical knock sensor and the crankshaft transducer means.

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