Method for detecting a failure in a fuel return valve of an aircraft engine fuel circuit
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-007/22
G01M-015/00
B64D-037/00
B64D-037/14
B64D-037/32
F02C-007/232
F16K-037/00
B64D-037/02
G01L-019/00
출원번호
US-0033007
(2014-10-27)
등록번호
US-10082444
(2018-09-25)
우선권정보
FR-13 60636 (2013-10-30)
국제출원번호
PCT/FR2014/052723
(2014-10-27)
국제공개번호
WO2015/063400
(2015-05-07)
발명자
/ 주소
Veyrat-Masson, Antoine
Gomes, Nicolas
Mottet, Lauranne
출원인 / 주소
SAFRAN AIRCRAFT ENGINES
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A method for detecting a failure in a fuel return valve of an aircraft engine fuel circuit, the fuel circuit including a fuel tank, an engine fuel system connected to the fuel tank capable of delivering a flow of fuel to the engine depending on a speed of the engine, a fuel return pipe connected bet
A method for detecting a failure in a fuel return valve of an aircraft engine fuel circuit, the fuel circuit including a fuel tank, an engine fuel system connected to the fuel tank capable of delivering a flow of fuel to the engine depending on a speed of the engine, a fuel return pipe connected between the engine fuel system and the fuel tank, a fuel return valve arranged to switch between an open and closed position, the valve being capable of blocking the fuel return pipe in the closed position, and of bringing the fuel return pipe into communication with the fuel tank in the open position, the method including measuring a pressure of the flow of fuel from the fuel tank, and if the measured pressure is lower than a predefined threshold, measuring the engine speed.
대표청구항▼
1. A method for detecting a failure of a motive flow valve of a fuel circuit of an aircraft engine, the fuel circuit including a fuel tank, a jet pump disposed in the fuel tank, an engine fuel system connected to the fuel tank said engine fuel system being capable of delivering a fuel flow to the en
1. A method for detecting a failure of a motive flow valve of a fuel circuit of an aircraft engine, the fuel circuit including a fuel tank, a jet pump disposed in the fuel tank, an engine fuel system connected to the fuel tank said engine fuel system being capable of delivering a fuel flow to the engine as a function of a speed of said engine, a fuel return pipe connected between the engine fuel system and the jet pump, a motive flow valve arranged to switch between an open position and a closed position, said motive flow valve being capable of blocking, in closed position, the fuel return pipe and putting, in open position, the fuel return pipe in communication with the jet pump, the method comprising the following steps performed in a calculating circuitry: measuring pressure of the fuel flow originating from the fuel tank; andif the measured pressure is less than a predetermined threshold, measuring the speed of the engine, and if the engine speed measured is less than a predetermine threshold, a failure of the motive flow valve is determined, the failure being an open blocked position. 2. The method according to claim 1, wherein the measuring of the pressure of the fuel flow originating from the fuel tank is done by means of a pressure sensor arranged along a pipe connecting the fuel tank to the engine fuel system. 3. The method according to claim 1, wherein the measuring of the engine speed is done by means of a speed sensor. 4. The method according to claim 1, wherein the predetermined threshold of the pressure is a low-pressure threshold Pinf, where Pinf=7 psi. 5. The method according to claim 1, wherein the predetermined threshold of the engine speed N2sup is less than a speed threshold N2, where N2sup=45% of N2. 6. The method according to claim 1, wherein the predetermined threshold of the engine speed N2inf is greater than a speed threshold N2, where N2inf=30% of N2. 7. A fuel circuit of an aircraft engine, the fuel circuit comprising: a fuel tank;a jet pump disposed in the fuel tank;an engine fuel system connected to the fuel tank, said engine fuel system being capable of delivering a fuel flow to the engine as a function of a speed of said engine;a fuel return pipe connected between the engine fuel system and the jet pump;a motive flow valve arranged to switch between an open position and a closed position, said motive flow valve being capable of blocking, in closed position, the fuel return pipe and putting, in open position, the fuel return pipe in communication with the jet pump; andcalculating circuitry configured tomeasure pressure of the fuel flow originating from the fuel tank; and if the measured pressure is less than a predetermined threshold, measure the speed of the engine, and if the engine speed measured is less than a predetermined threshold, a failure of the motive flow valve is determined, the failure being an open blocked potion. 8. An aircraft comprising an engine supplied with fuel via a fuel circuit according to claim 7.
White Albert H. (Wethersfield CT) Peck Robert E. (Prospect CT) Meyer Gene A. (W. Simsbury CT) Devanney Raymond H. (Winsted CT), Dual stepper motor actuator for fuel metering valve.
Glidewell John M. (Dearborn MI) Chui Granger K. (Dearborn Heights MI) Yang Woong-Chul (Ann Arbor MI), On-board detection of pressure regulator malfunction.
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