Development of the Electric Fuel System for the More Electric Engine

2014 ◽  
Author(s):  
Noriko Morioka ◽  
Hitoshi Oyori ◽  
Yukinori Gonda ◽  
Kenji Takamiya ◽  
Yasuhiko Yamamoto
Keyword(s):  
Electric Motor ◽  
Aircraft Engine ◽  
Fuel System ◽  
Motor Speed ◽  
Pump System ◽  
Fuel Pump ◽  
Fuel Flow ◽  
Set Up ◽  
Electric Fuel Pump ◽  
Electric Engine

This paper describes the experimental rig test result of the electric motor-driven fuel pump system for the MEE (More Electric Engine). The MEE is an aircraft engine system concept, which replaces conventional mechanical/hydraulic driven components with electric motor-driven components. Various MEE approaches have been studied since the early 2000s and one of its key concepts is an electric motor-driven fuel pump [1–4]. The authors commenced a feasibility study of the electric motor-driven gear pump system for what was assumed to be a small-sized turbofan engine. The concept study and system design were conducted, whereupon technical issues for the electric fuel pump system, which both supplies and meters fuel via the motor speed control, were clarified [5, 6]. Since one of the key issues is fuel-metering accuracy, the electric fuel system, including a flow feedback closed-loop control, was designed to ensure accurate fuel-flow metering for aircraft engine applications. To verify the rig system, an experimental model of the electric fuel pump system is assumed for a small-sized turbofan engine. The hardware of the motor-driven fuel pump and flow measurement mechanism, including an FPV (Fuel-Pressurizing Valve) and orifice, were designed, manufactured and fabricated and a differential pressure sensor for flow feedback was selected. Other equipment was also prepared, including a motor controller, power source and measurement devices, and the entire rig set-up was constructed. A bench test using the rig test set-up was conducted to verify the fuel-metering accuracy, response and system stability. Data, including the static performance and frequency response, were obtained for the electric motor, motor-driven fuel pump and entire fuel system respectively. The rig test results indicate the feasibility of the system, which will provide an accurate engine fuel flow (Wf) measurement and frequency response required for actual engine operation, via an electric motor speed control and fuel-flow feedback system, as proposed in the MEE electric fuel system.

Fuel System Design for the More Electric Engine

2012 ◽  
Author(s):  
Noriko Morioka ◽  
Hitoshi Oyori
Keyword(s):  
System Design ◽  
Feedback System ◽  
Gear Pump ◽  
Fuel System ◽  
Pump System ◽  
Fuel Pump ◽  
Technical Challenge ◽  
Speed Range ◽  
Technical Challenges ◽  
Electric Engine

This paper describes the system design of an electric motor-driven fuel pump system for the MEE (More Electric Engine). The MEE is a new aircraft engine system concept which will reduce fuel burn and CO2 emissions, and improve engine safety, reliability and maintainability. At the initial concept design stage of the MEE, a feasibility study indicated that the electric fuel pump system helped improve engine efficiency. The selected fuel pump system configuration for the MEE was a fixed displacement gear pump system, the speed of which is controlled by an electric motor. Simplification of the fuel system will be expected because the electric gear pump itself is used as a metering device, but there are several technical challenges which should be overcome to realize the system. One of the technical challenges involves ensuring fuel metering accuracy via motor speed control. To address the issue, studies of the fuel flow rate feedback system were performed. A novel flow feedback system was investigated and the potential to ensure metering accuracy was confirmed. The other technical challenge is the wide speed range operation of the gear pump system. If only a single electric gear pump is used in the MEE system, the pump should accommodate a speed range of 5 to 100% because the ground starting flow rate is about 5% of the maximum flow. Operation at such low speeds is significantly harsh for the LP pump pressurizing capability and bearing film lubrication. However, optimized pump performance and operational condition were established, and it is expected that a single pump system, in which both LP and HP pumps are directly motor-driven via a single shaft, can be constructed. In addition, there is a technical challenge involved in supplying electrical power to the pump motor during the windmill engine start-up. The system design focused on the above technical challenges, and the consequent feasibility of the simplified MEE fuel pump system construction was confirmed.

Development of Fuel Control System for More Electric Engine

2015 ◽  
Author(s):  
Naoki Seki ◽  
Noriko Morioka ◽  
Hitoshi Oyori ◽  
Yasuhiko Yamamoto
Keyword(s):  
Control Method ◽  
Pressure Oscillation ◽  
System Stability ◽  
Gear Pump ◽  
Engine Fuel ◽  
Fuel System ◽  
Loop Control ◽  
Fuel Flow ◽  
Electric Engine ◽  
Experimental Rig

This paper describes the experimental rig test result and an investigation into issues of system stability and pressure oscillation transmission in the MEE (More Electric Engine) fuel system. This system employs an electric motor-driven pump and directly meters the fuel flow based on the motor rotating speed. The MEE is a system architecture concept for the aircraft turbine engine that reduces fuel consumption and environmental load while improving safety, reliability and maintainability. The improvements were demonstrated by conducting a feasibility study of MEE system for small sized turbofan engine [5, 6]. The authors also conducted an experimental rig test showing capabilities in terms of fuel-metering range, accuracy and response [7]. The capability of the feedback loop control under the engine start condition was shown by the result, but meanwhile, pressure oscillation under the higher fuel flow condition was also observed. The authors repeated the rig test to investigate its root cause. This paper describes the study, which investigates the characteristics of the MEE fuel system and seeks stable control methods under conditions of higher pressure fluctuation, higher instrumentation noise or applying worn gear pump. The paper also describes the study of the pressure oscillation transmission from pump to engine combustor, which may damage the engine combustor and structures. As a result of these studies, a novel control method for the MEE fuel system is proposed, with improved oscillation stability.

More Electric Engine Architecture for Aircraft Engine Application

2011 ◽  
Author(s):  
Noriko Morioka ◽  
Hitoshi Oyori ◽  
Daiki Kakiuchi ◽  
Kanji Ozawa
Keyword(s):  
Fault Tolerant ◽  
Fuel Efficiency ◽  
Reducing Power ◽  
Aircraft Engine ◽  
Engine Control ◽  
Pump System ◽  
Power Extraction ◽  
Engine Control System ◽  
Fuel Burn ◽  
Electric Engine

This paper describes the system design and evaluation of a noble MEE (More Electric Engine) system. The results show that the proposed MEE system can significantly reduce the fuel burn of engines and CO2 emissions from aircraft and also improve the safety, reliability and maintainability of engines. The MEE is advanced engine control technology utilizing recent innovations in electrical motors, motor controllers and power electronics. It replaces conventional engine accessories, such as AGB (Accessory Gear Box)-driven pumps, hydraulic actuators with electrical pumps and EMAs (Electro-Mechanical Actuators), which are powered by generators. The first step of the MEE is supposed to be the motor-driven fuel pump system, which can improve engine efficiency by reducing power extraction from the engine and eliminating ACOCs (Air-Cooled Oil Coolers) which worsen fuel efficiency by wasting fan discharge air. The goal of the MEE consists of eliminating the heavy AGB via electrical accessories and an engine-embedded starter/generator. The incorporation of a unique redundant Active-Active control architecture and a fault-tolerant design for the dual motor system successfully achieves a highly reliable and complete one fail operational/two fail safe engine control system.

scholarly journals A study of the output characteristics of electric fuel pumps during artificial fault simulation

2021 ◽  
Vol 49 (2) ◽  
pp. 480-487
Author(s):  
A. Gritsenko ◽  
Vladimir Shepelev ◽  
A. Burzev ◽  
G. Salimonenko
Keyword(s):  
Motor Vehicle ◽  
Fault Simulation ◽  
Experimental Studies ◽  
Technical Condition ◽  
Fuel System ◽  
Fuel Pump ◽  
System Failures ◽  
Output Characteristics ◽  
Injection Unit ◽  
Electric Fuel Pump

The electric fuel pump (EFP) is one of the potential sources of fuel system failures. According to various data, the fuel system accounts for 25...50% of all failures. The most common reason for the impairment of the fuel system performance and, in particular, the failure of the fuel pump is the contamination of fuel with large or small particles, as well as the wear of the structural elements of the EFP. The purpose of the study is to determine the technical condition of electric fuel pumps of motor vehicle engines based on the use of testing technologies. The paper discusses theoretical and experimental studies of the fuel system of motor vehicle engines: the change in the current consumption rate of the EFP depending on the degree of contamination of series elements in the system and leaks in the injection unit of the EFP.

Optimisation of a Pump-Controlled Hydraulic System using Digital Displacement Pumps

2021 ◽  
Author(s):  
L. Viktor Larsson ◽  
Robert Lejonberg ◽  
Liselott Ericson
Keyword(s):  
Electric Motor ◽  
Energy Savings ◽  
High Energy ◽  
Motor Speed ◽  
Efficient Operation ◽  
Pump Speed ◽  
Hardware Configuration ◽  
Control Optimisation ◽  
And Control ◽  
Parasitic Components

When electrifying working machines, energy-efficient operation is key to maximise the use of the limited capacity of on-board batteries. Previous research indicate high energy savings by means of component and system design. In contrast, this paper focuses on how to maximise energy efficiency by means of both design and control optimisation. Simulation-based optimisation and dynamic programming are used to find the optimal electric motor speed trajectory and component sizes for a scooptram machine equipped with pump control, enabled by digital displacement pumps with dynamic flow sharing. The results show that a hardware configuration and control strategy that enable low pump speed minimise drag losses from parasitic components, partly facilitated by the relatively high and operation point-independent efficiencies of the pumps and electric motor. 5–10% cycle energy reductions are indicated, where the higher figure was obtained for simultaneous design and control optimisation. For other, more hydraulic-intense applications, such as excavators, greater reductions could be expected.

Application of a Fuzzy Logic Controller for Speed Control on a Small-Scale Turbojet Engine

2014 ◽  
Author(s):  
Serdar Üşenmez ◽  
Sinan Ekinci ◽  
Oğuz Uzol ◽  
İlkay Yavrucuk
Keyword(s):  
Fuzzy Logic ◽  
Steady State ◽  
Transient Response ◽  
Fuzzy Logic Controller ◽  
Electronic Control Unit ◽  
Small Scale ◽  
Gas Temperature ◽  
Fuel Pump ◽  
Fuel Flow ◽  
Turbojet Engine

Having a small-scale turbojet engine operate at a desired speed with minimum steady state error, while maintaining good transient response is crucial in many applications, such as UAVs, and requires precise control of the fuel flow. In this paper, first the mathematical model of a Small-Scale Turbojet Engine (SSTE) is obtained using system identification tests, and then based on this model, a classical PI controller is designed. Afterwards, to improve on the transient response and steady state performance of this classical controller, a Fuzzy Logic Controller (FLC) is designed. The design process for the FLC employs logical deduction based on knowledge of the engine behavior and iterative tuning in the light of software- and hardware-in-the-loop simulations. The classical and fuzzy logic controllers are both implemented on an in-house, embedded Electronic Control Unit (ECU) running in real time. This ECU is an integrated device carrying a microcontroller based board, a fuel pump, fuel line valves, speed sensor and exhaust gas temperature sensor inputs, and starter motor and glow plug driver outputs. It mainly functions by receiving a speed reference value via its serial communication interface. Based on this reference, a voltage is calculated and applied to the fuel pump in order to regulate the fuel flow into the engine, thereby bringing the engine speed to the desired value. Pre-defined procedures for starting and stopping the engine are also automatically performed by the ECU. Further, it connects to a computer running an in-house comprehensive Graphical User Interface (GUI) software for operating, monitoring, configuration and diagnostics purposes. The designed controllers are used to drive a generic SSTE. Reference inputs consisting of step, ramp and chirp profiles are applied to the controllers. The engine response using both controllers are recorded and inspected. The results show that the FLC exhibits a comparable performance to the classical controller, with possible opportunities to improve this performance.

scholarly journals Conjectural Bifurcation Analysis of an Aircraft Engine Blade Undergoing 3D Unilateral Contact Constraints

2014 ◽  
Author(s):  
Alain Batailly ◽  
Mathias Legrand
Keyword(s):  
Spline Interpolation ◽  
Sudden Change ◽  
Aircraft Engine ◽  
Rotational Frequency ◽  
Compressor Blade ◽  
Structural Behaviour ◽  
Mode Decomposition ◽  
Abradable Coating ◽  
Set Up ◽  
Pressure Compressor

Prediction of rotor/stator interaction phenomena between a blade-tip and the surrounding abradable coating deposited on the casing has seen recent promising numerical developments that revealed consistency with several experimental set-up. In particular, the location of critical rotational frequencies, damaged blade areas as well as the wear pattern along the casing circumference were accurately predicted for an interaction scenario involving a low-pressure compressor blade and the surrounding abradable coating deposited on a perfectly rigid casing. The structural behaviour of the blade in the vicinity of a critical rotational frequency however remains unclear as brutal amplitude variations observed experimentally could not be numerically captured without assuming contact loss or an improbable drastic and sudden change of the abradable coating mechanical properties during the interaction. In this paper, attention is paid to the structural behaviour of a high-pressure compressor blade at the neighbourhood of a critical rotational frequency. The interaction scenarios for two close rotational frequencies: Ωc and Ωc* are analyzed using empirical mode decomposition based on an adjusted B-spline interpolation of the time responses. The obtained results are compared to the interaction scenario dictated by the abradable coating removal history and the location of contact areas. The unstable nature of the blade vibratory response when the rotational frequency exceeds a critical rotational frequency is underlined and a plausible scenario arises for explaining a sudden and significant decrease of the blade amplitude of vibration without contact separation.

scholarly journals Pemanfaatan Motor Listrik Bertenaga Energi Matahari Sebagai Penarik Jaring Pada Kapal Nelayan

2019 ◽  
Vol 2 (3) ◽  
pp. 85-89
Author(s):  
Ali Basrah Pulungan ◽  
Asnil Asnil ◽  
Rahmat Hidayat ◽  
Juli Sardi ◽  
Syaiful Islami
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Solar Energy ◽  
Electric Motor ◽  
Weather Conditions ◽  
Cell System ◽  
Fuel Oil ◽  
Motor Speed ◽  
Hand Tools ◽  
Fishing Boat

This article aim to be able to take advantage of an electric motor as a net puller on a fishing boat using solar energy. The use of human labor as a net puller requires a large amount of energy and needs a break to be able to do more withdrawal activities, so the number of withdrawals that can be done is very limited. Pantai Jaya fishing groups as partners are among the 20 active fishing groups in the Pasie Nan Tigo sub-district of Koto Tangah subdistrict of Padang City who experience these problems. The problem of this partner can be given a solution in the form of the use of an electric motor as a towing net on a fishing boat. In order not to cause problems in terms of electricity supply, solar energy can be used by using solar cells, so there is no addition of fuel oil. The implementation method given is direct installation and provision of extension materials on the use of solar cell technology and the introduction of components and hand tools. This activity was carried out for two days which included preparation, installation and training, followed by a group of fishermen. The fishing group received a set of solar cells, electric motors, batteries and other accessories and installed them. Based on tests that have been carried out in sunny weather conditions at 300C, a load of 50 kg with a rated voltage at that time 12.4V, motor speed 2.7m / min, 2.4A. Based on the results of these tests indicate that the solar cell system has worked according to the parameters it should. Therefore, it can be said that this activity has been carried out properly and the solar cell system is functioning properly. Participants hope for these activities to be carried out for the following year, because there are still a number of fishing boat groups that are in dire need.

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