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Cylinder recognition apparatus for a multi-cylinder internal combustion engine

  • US 5,070,726 A
  • Filed: 10/01/1990
  • Issued: 12/10/1991
  • Est. Priority Date: 10/02/1989
  • Status: Expired due to Term
First Claim
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1. A cylinder recognition apparatus for a multi-cylinder internal combustion engine comprising:

  • a signal generator for generating a first signal and a second signal synchronously with the rotation of the engine, the first signal containing a plurality of positional pulses each representative of prescribed reference rotational positions of a corresponding cylinder, the second signal containing a plurality of cylinder recognition pulses each at a location near a corresponding one of the positional pulses, each cylinder recognition pulse having a specific angular relation with respect to a corresponding positional pulse which is different from that of any other cylinder recognition pulse; and

    cylinder recognition means for detecting the level of the second signal at the prescribed reference rotational positions of each cylinder so as to generate an appropriate serial pattern representative of a series of successively detected signal levels, the cylinder recognition means being operable to recognize the operating state of each cylinder based on the serial pattern.

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