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Engine analyzer waveform display with a buffer region

  • US 5,160,892 A
  • Filed: 10/05/1990
  • Issued: 11/03/1992
  • Est. Priority Date: 10/05/1990
  • Status: Expired due to Term
First Claim
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1. A display, for an engine test system, comprising:

  • means for providing a periodic analog input waveform representative of operation of an internal combustion engine, the waveform having a period which varies as a function of the engine speed;

    analog to digital converter means for sampling the analog input waveform periodically at a data sampling rate and converting each sample to a digital value representative of an analog value of the analog input signal;

    display means for displaying a simulated visual representation based upon digital values from the analog to digital converter, the simulated visual display being representative of operation of the internal combustion engine; and

    means for determining the data sampling rate of the analog to digital converter as a function of engine speed, an adjustment factor, a maximum number of data points, a number of cylinders of the internal combustion engine, and a total firing time of a firing cycle of the internal combustion engine.

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