OVERSPEED PROTECTION DEVICE OF AN AIRCRAFT ENGINE Russian patent published in 2019 - IPC F02C9/46 F02C9/28 F01D21/02 

FIELD: machine building.

SUBSTANCE: invention relates to an overspeed protection device of an aircraft engine. Device comprises: voltage source (S) configured to output a voltage according to a negative or positive polarization, logic controller (ECA) connected in series with voltage source (S), first electronic unit (ECU#1) and second electronic unit (ECU#2), connected in series with voltage source (S) and logic controller (ECA), wherein each electronic unit comprises a first speed sensor and a second speed sensor, as well as a first switch and a second switch normally closed. Thus, the normally closed first and second switches are responsive to the first and second discrete control electrical signals, respectively, if the voltage has the same predetermined polarization. Wherein the first and second switches allow, for the same predetermined polarization, first (ECU#1) and second (ECU#2) electronic units to isolate or connect logic controller (ECA) to voltage source (S) in accordance with said control discrete electrical signals. Also provided is a fuel supply system of an engine of an aircraft comprising an overspeed protection device and an aircraft engine provided with such a system.

EFFECT: invention provides the simplified design, improved failure detection, without requiring a power complexity.

9 cl, 5 dwg