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System and method for lightoff detection in turbine engines

  • US 7,216,489 B2
  • Filed: 05/26/2004
  • Issued: 05/15/2007
  • Est. Priority Date: 05/26/2004
  • Status: Expired due to Fees
First Claim
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1. A method of detecting combustion system lightoff in a turbine engine, the method comprising the steps of:

  • a) receiving engine temperature sensor data and engine speed sensor data for the turbine engine during startup;

    b) determining a first time interval before a threshold time when the engine temperature sensor data reaches a threshold value;

    c) determining a peak gradient of the engine temperature sensor data in the first time interval;

    d) determining a peak gradient of the engine speed sensor data in the first time interval;

    e) determining a second time interval between the peak gradient of the engine temperature sensor data and the peak gradient of the engine speed sensor data; and

    f) determining a minimum gradient time of the engine speed sensor data in the second time interval, the minimum gradient time comprising an estimated lightoff time for the turbine engine.

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