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Engine-performance monitor and control system

  • US 4,532,592 A
  • Filed: 12/22/1982
  • Issued: 07/30/1985
  • Est. Priority Date: 12/22/1982
  • Status: Expired due to Term
First Claim
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1. A system for controlling the performances of the individual cylinders of a multiple cylinder internal combustion engine comprising an engine ignition generator and spark distribution system, means for coupling the ignition generator and spark distribution system to the various cylinders, means for sensing engine crankshaft position, a clock for generating a time base, means for sensing the top dead center point of the power stroke in each cylinder, means for calculating crankshaft speed, means for coupling the clock and the crankshaft position sensor to the crankshaft speed calculator, means for calculating combustion efficiencies of the various cylinders, means for coupling the combustion efficiency calculating means to the clock, to the crankshaft position sensor, and to the means for sensing the top dead center point, the combustion efficiency calculating means calculating the combustion efficiency of each cylinder by determining a measure of the speed of the crankshaft during a portion of each cylinder'"'"'s stroke in response to signals from the clock and the crankshaft position sensor and comparing the measures of crankshaft speed determined during the strokes of cylinders, means for calculating ignition timing for the various cylinders to control the performances of the various cylinders, means for coupling the combustion efficiency calculator to the ignition timing calculator and means for coupling the ignition timing calculator to the ignition generator and spark distribution system.

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