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Anti-icing valve

  • US 4,831,819 A
  • Filed: 07/02/1987
  • Issued: 05/23/1989
  • Est. Priority Date: 07/02/1987
  • Status: Expired due to Fees
First Claim
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1. In a gas turbine engine having inlet surfaces subject to the formation of ice thereon and including a source of heated air, air duct means adjacent to said surfaces for receiving the heated air to prevent the formation of ice thereon, and passage means enabling the flow of heated air from said source to said air duct means, the improvement comprising:

  • valve means operable to pulsate between open and closed positions for controlling the flow of heated air through said passage means on a pulse width basis;

    detecting means for sensing at least one existing condition and for generating a signal proportional to the magnitude of each condition so sensed; and

    switching means responsive to the signal from said detecting means for operating said valve means to pulsate over a range of pulse widths according to a predetermined pattern which assures an average flow rate of heated air into said air duct means sufficient to prevent the formation of ice on said inlet surfaces.

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