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Apparatus for sensing the engine parameters of an internal combustion engine

  • US 5,505,177 A
  • Filed: 09/19/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 01/28/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus for controlling ignition timing or the fuel-air ratio of an internal combustion engine, said apparatus comprising:

  • at least one optical sensor for detecting light emission caused by combustion in a combustion chamber of said internal combustion engine;

    at least one photo sensor in optical communication with said optical sensor for converting said light emission into electrical signals; and

    a processing apparatus comprising an apparatus for determining a maximum value of said light emission from said electrical signals, said processing apparatus providing an electrical output signal representative of the absolute value of said maximum value of said light emission, said output signal being supplied to an input of a controller for controlling said ignition timing or fuel-air ratio in dependence of said output signal.

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