Detecting spark in igniter of gas turbine engine by...

Details Detecting spark in igniter of gas turbine engine by... Detecting spark in igniter of gas turbine engine by...

2006-08-22

2006-08-22

Kim, Ted (Department: 3746)

Power plants

Combustion products used as motive fluid

Combustion products generator

C123S1690EB, C313S118000

Reexamination Certificate

active

07093422

ABSTRACT:
A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the igniter, to thereby infer the presence of spark. The Inventors have found that this approach is effective, despite the fact that the inductor is surrounded by grounded shielding intended to suppress rf interference, and to protect personnel from high voltages present. The shielding is intended to block the very signals which the invention detects.

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