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Anti-coking fuel injector purging device

  • US 6,125,624 A
  • Filed: 04/17/1998
  • Issued: 10/03/2000
  • Est. Priority Date: 04/17/1998
  • Status: Expired due to Term
First Claim
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1. An anti-coking fuel injector purging device for a gas turbine engine, which includes an intake air compressor upstream of a combustion chamber including at least one fuel injector having fuel injector orifices supplied with liquid fuel from a fuel line, the anti-coking fuel injector purging device comprising:

  • air purging means adapted to connect to the fuel line and a cooling air source for continuously exhausting cooling air through the fuel injection orifices during a selected purging period commencing upon engine shutdown;

    engine shutdown sensor switch means for activating the air purge means on sensing engine shutdown; and

    purge termination switch means for deactivating the air purge means on sensing an injector temperature below a selected allowable temperature.

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