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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10047678 B1

PDFFull Text
Date of Patent:
Aug. 14, 2018

Filed:

Sep. 28, 2015

Method of stopping a rotorcraft engine in overspeed, and a system and a rotorcraft associated therewith

Applicant:

Airbus Helicopters, Marignane, FR;

Inventor:

Bernard Certain, Aix en Provence, FR;

Assignee:

Airbus Helicopters, Marignane, FR;

Attorney:

Brooks Kushman P.C.

Primary Examiner:

Gerald L Sung

Assistant Examiner:

Scott Walthour

Int. Cl.
CPC ...
F02C 9/28 (2006.01); F02C 9/26 (2006.01); F02C 7/22 (2006.01); F01D 21/04 (2006.01); F01D 21/00 (2006.01); F01D 21/14 (2006.01); F01D 21/06 (2006.01); F01D 21/02 (2006.01); F02C 3/10 (2006.01); F02C 9/46 (2006.01); F02C 3/04 (2006.01);
U.S. Cl.
CPC ...
F02C 9/28 (2013.01); F01D 21/00 (2013.01); F01D 21/003 (2013.01); F01D 21/02 (2013.01); F01D 21/04 (2013.01); F01D 21/06 (2013.01); F01D 21/14 (2013.01); F02C 3/04 (2013.01); F02C 3/10 (2013.01); F02C 7/22 (2013.01); F02C 9/26 (2013.01); F02C 9/46 (2013.01); F05D 2220/323 (2013.01); F05D 2220/329 (2013.01); F05D 2270/021 (2013.01); F05D 2270/09 (2013.01); F05D 2270/091 (2013.01); F05D 2270/093 (2013.01); F05D 2270/304 (2013.01); F05D 2270/331 (2013.01); F05D 2270/335 (2013.01);
Abstract

A method of stopping an engine of a rotorcraft in overspeed, the engine comprising a gas generator and a power assembly. When the engine is in operation, the engine is automatically stopped when the following three conditions are satisfied simultaneously: a torque (Tq) measured on the power assembly is below a predetermined torque threshold (Tq); and a speed of rotation referred to as a 'first speed of rotation (N)' of the gas generator is above a threshold referred to as a 'first speed threshold (S)'; and a speed of rotation referred to as a “second speed of rotation (N)” of the power assembly is above a threshold referred to as a “second speed threshold (S)”.

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