Safran Helicopter Engines

Turbomeca

Fabien Lescher

Stephen Langford

Jean Philippe Jacques Marin

Philippe Etchepare

Jean Philippe Marin

The invention relates to a method for detecting a malfunction in a first turboshaft engine, referred to as an inoperative engine (), of a twin-engine helicopter, and for controlling a second turboshaft engine, referred to as a healthy engine (), each engine () comprising protective stops regulated by a regulation device which define a maximum power regime, characterised in that it comprises: a step () of detecting an indication of failure of said inoperative engine (); a step () of modifying said protective stops of said healthy engine () into protective stops which correspond to a maximum power single-engine regime, in the case of the detected indication of failure; a step () of confirming a failure of said inoperative engine (); a step () of controlling an increase in the flow rate of fuel supply of said healthy engine (), in the event of a confirmed failure.

Method for detecting a failure of a first turbine engine of a twin-engine helicopter and for operating the second turbine engine, and corresponding device

A turbine engine includes a compressor, a combustion chamber, first and second turbines downstream from the combustion chamber, a first rotary shaft constrained to rotate at least with the compressor and the first turbine, a second rotary shaft constrained to rotate with the second turbine, the second rotary shaft nevertheless being free to rotate relative to the first rotary shaft, and a regulator for controlling the feed of fuel to the combustion chamber. The regulator cuts off the feed of fuel to the combustion chamber if the speed of rotation of the second rotary shaft exceeds a maximum threshold that varies as a function of at least one indicative physical parameter associated with mechanical power being extracted from the combustion gas by the second turbine. A method of regulating the turbine engine is also presented.

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Aressy, France

Fabien Lescher