• Title, Summary, Keyword: Fuel Gauge

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A Study on Stable Indication for a Sloshing of Fuel-quantity according to Driving State of Vehicle (차량 주행 상태에 따른 연료량 유동의 안정 지침에 대한 연구)

  • Hur, Jin;Park, Jong-Myeong;Lee, Seon-Bong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.3
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    • pp.37-44
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    • 2012
  • In this paper, the application of robust fuel gauge algorithm in the external environment to general fuel gauge system is proposed. The proposed fuel gauge system is composed of two modules which are Moving Average Filter (MAF) and Inclination Filter (IF). They are used to show correctly the amount of fuel in the external environment which are curve road, slope or acceleration/deceleration driving. In parallel, verification and validation processes using Software In the Loop Simulation (SILS) in personal computer and Hardware In the Loop Simulation (HILS) similar to actual vehicle environments are established. Through this research, it turned out to be possible to operation of gauge become correct of external environment.

A Study of Fuel Gauge System Matching Method Using Characteristic Chart to Fuel Consumption Ratio in Vehicles (특성 선도를 이용한 자동차용 연료 지침계의 연료 소비율에 따른 시스템 제어 방법에 관한 연구)

  • Lee, Seon-Bong;Lee, Boo-Youn
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.32 no.2
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    • pp.194-201
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    • 2008
  • In the present study, fuel system matching was analyzed, and a characteristic chart for common use for design-related parts is presented. Based on the characteristic chart thus presented, controlled fuel system matching was tested for a 35-liter fuel system, and actual mass product movement coils were applied to validate the test. The keynote of the present research is the use of the characteristic chart to devise a preferred fuel system matching method. Through the present study, it will be possible to design standard parts for efficient fuel system matching in the near future.

Electric Fuel Sender Apparatus for the Vehicles Using CPW Transmission Line (CPW 전송선을 이용한 전자식 자동차용 연료 센더 장치)

  • Son Tae-Ho
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.4
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    • pp.380-386
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    • 2006
  • Electric fuel sender fur the vehicle fuel gauge system was designed and fabricated based on the CPW(Co-Planer Waveguide) transmission line theory. It is applied on this system that characteristic impedance of RF transmission line can be varied by the surrounded material of the line. By the characteristic impedance owing the level of gasoline or diesel fuel in vehicle fuel tank, CPW line has corresponding reflected signal as much as changed impedance. Detected signal is amplified, and delivered to fuel indicator into cluster unit on dash board. Conventional floating mechanical buoy level gauge has several defects as low reliability and high break down rate by mechanical operation, and has not good linearity for the fuel level difference. CPW line with electric circuits are constructed on 1.6 mm thickness epoxy substrate, and measurement shows that this system has more accurate level and better linearity than conventional mechanical system. New electric fuel sender which has good productivity with long lifetime and low-in-cost by the SMT chip assembling could be replaced this system with conventional floating buoy system.

Optimal design of dual magnetic float type level gauge to detect a specific level (특정 레벨을 검출하기 위한 2단 Magnetic Float 타입 레벨 게이지의 최적 설계에 관한 연구)

  • Kim, Dong-Sok;Han, Jae-Man;Park, Gwan-Soo
    • Journal of Sensor Science and Technology
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    • v.17 no.4
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    • pp.308-316
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    • 2008
  • For the measurement of liquid level in ship's cargo tank, ballast tank, fuel oil tank and fresh water tank, several types of gauge meter are used such as tubular type, magnetic float type, reflex type transparent type and welding pad type. Among them, magnetic float type gauge meter is environmental friendly device because it is free of power source and maintenance. The main obstacle of the device is relatively large error bound. In this paper, finite element method is used to design and analysis of the magnetic float type gauge meter. The operation of reed switch according to the magnetic field has been successfully described and agreed well with experimental measurement. The optimum geometry with combination of permanent magnet and reed switches are designed to achieve 98 % accuracy of fluid level.

Evaluation of Optimized Ring Specimen Shape for the Hoop Behavior Test of Nuclear Fuel Clad Tube (핵연료 피복관의 후우프 거동시험을 위한 시편의 최적형상 평가)

  • 서기석
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.171-178
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    • 2000
  • In order to evaluate the tensile behaviors of hoop direction for the nuclear fuel cladding tubes the shapes of specimen and jig fixtures for the ring test are decided with various conditions under the elastic-large plastic deformations. The axial displacement of the jig cylinders is converted to the circumferential direction elongations of specimen. The stress distributions on specimen are depended on the radii and locations of specimen and jig size and central angle. Therefore we calculated the stress distributions and decided the optimum shapes to get the uniform stress in the area of specimen gage length. Form the analysis the stress distributions in gate area are reviewed with the radii and location of specimen notch and the central angle of jig cylinder,. The optimum shapes of specimen and jig are proposed to the clad tube having 10.62 mm in diameter and 0.63mm in thickness for 16x16 PWR nuclear fuel assembly.

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Combustion and Radiation Characteristics of Oxygen-Enhanced Inverse Diffusion Flame

  • Hwang, Sang-Soon;Gore, Jay-P
    • Journal of Mechanical Science and Technology
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    • v.16 no.9
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    • pp.1156-1165
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    • 2002
  • The characteristics of combustion and radiation heat transfer of an oxygen-enhanced diffusion flame was experimentally analyzed. An infrared radiation heat flux gauge was used to measure the thermal radiation of various types of flames with fuel, air and pure oxygen. And the Laser Induced Incandescence (LII) technique was applied to characterize the soot concentrations which mainly contribute to the continuum radiation from flame. The results show that an oxygen-enhanced inverse diffusion flame is very effective in increasing the thermal radiation compared to normal oxygen diffusion flame. This seems to be caused by overlapped heat release rate of double flame sheets formed in inverse flame and generation of higher intermediate soot in fuel rich zone of oxygen-fuel interface, which is desirable to increase continuum radiation. And the oxygen/methane reaction at slight fuel rich condition (ø=2) in oxygen-enhanced inverse flame was found to be more effective to generate the soot with moderate oxygen availability.

Optimization of aircraft fuel consumption and reduction of pollutant emissions: Environmental impact assessment

  • Khardi, Salah
    • Advances in aircraft and spacecraft science
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    • v.1 no.3
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    • pp.311-330
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    • 2014
  • Environmental impact of aircraft emissions can be addressed in two ways. Air quality impact occurs during landings and takeoffs while in-flight impact during climbs and cruises influences climate change, ozone and UV-radiation. The aim of this paper is to investigate airports related local emissions and fuel consumption (FC). It gives flight path optimization model linked to a dispersion model as well as numerical methods. Operational factors are considered and the cost function integrates objectives taking into account FC and induced pollutant concentrations. We have compared pollutants emitted and their reduction during LTO cycles, optimized flight path and with analysis by Dopelheuer. Pollutants appearing from incomplete and complete combustion processes have been discussed. Because of calculation difficulties, no assessment has been made for the soot, $H_2O$ and $PM_{2.5}$. In addition, because of the low reliability of models quantifying pollutant emissions of the APU, an empirical evaluation has been done. This is based on Benson's fuel flow method. A new model, giving FC and predicting the in-flight emissions, has been developed. It fits with the Boeing FC model. We confirm that FC can be reduced by 3% for takeoffs and 27% for landings. This contributes to analyze the intelligent fuel gauge computing the in-flight fuel flow. Further research is needed to define the role of $NO_x$ which is emitted during the combustion process derived from the ambient air, not the fuel. Models are needed for analyzing the effects of fleet composition and engine combinations on emission factors and fuel flow assessment.

Evaluation of the Tensile Properties of Fuel Cladding at High Temperatures Using a Ring Specimen (링 시험편을 이용한 피복관의 고온 인장특성 평가)

  • Bae Bong-Kook;Koo Jae-Mean;Seok Chang-Sung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.29 no.4
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    • pp.600-605
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    • 2005
  • In this study, the ring tensile test at high temperature was suggested to evaluate the hoop tensile properties of small tube such as the cladding in the nuclear reactor Using the Arsene's ring model, the ring tensile test was performed and the test data were calibrated. From the result of the ring test with strain gauge and the numerical analysis with 1/8 model, LCRR(load-displacement conversion relationship of ring specimen) was determined. We could obtain the hoop tensile properties by means of applying the LCRR to the calibrated data of the ring tensile test. A few difference was observed in view of the shape of fractured surface and the fracture mechanism between at the high temperature and at the room temperature.

Development of Hydrocarbon Oil Detection Sensor using the Swelling Property of Silicone Rubber (기름에 대한 실리콘의 부피 변화 성질을 이용한 유출유 탐지 센서 개발)

  • Oh, Sang-Woo;Lee, Moon-Jin;Choi, Hyeuk-Jin
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.14 no.4
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    • pp.280-286
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    • 2011
  • In this research, the oil detection method and the characteristic of sensor using the selective reaction of silicone rubber in response to hydrocarbon oil will be described. As a sensing principle, the swelling property of silicone rubber in response to hydrocarbon fuel is used, also a strain gauge is used to transduce the volume change to an electrical signal. The sensor core is manufactured with a strain gauge embedded in silicone rubber by the curing process and experiments for characteristics of sensor core with various oils were carried out. It is shown that the sensor core can be used as an oil spill detection sensor. Also, for the application to the sea area, a buoy type sensor platform is integrated with a sensor core and a strain amplifier and it is tested in the simulated oil spill condition. In this study, it is proven that the integrated sensor can be used for the detection of various oils.