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Universal diagnostic method and system for engines

  • US 20040236494A1
  • Filed: 06/29/2004
  • Published: 11/25/2004
  • Est. Priority Date: 06/26/2001
  • Status: Active Grant
First Claim
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1. A method for diagnosing an operational state of an engine comprising the steps of:

  • (a) providing vibration data from the engine, said data synchronised with respect to the thermo-mechanical cycle of the engine;

    (b) transforming the synchronised vibration data in (a) into the frequency domain to obtain a Fourier representation of the vibration produced by the engine;

    (c) monitoring the characteristics of the harmonic components of the Fourier representation at least at one predetermined frequency, wherein said predetermined frequency is predetermined according to at least one first predetermined criterion;

    (d) analysing the characteristics of the harmonic components obtained in step (c) according to at least one second predetermined criterion to determine the operational state of the engine correlated to said second criterion.

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