• Title/Summary/Keyword: 차압유지밸브

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A Study on Stability Improvement of Fuel Metering Unit for Air Breathing Engine (공기흡입식 추진기관용 연료조절밸브 시스템 안정성 향상에 관한 연구)

  • 이도윤;박종승;최현영;구자용
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.34 no.9
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    • pp.76-81
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    • 2006
  • This paper deals with a fuel metering unit (referred to as FMU) for air breathing engine. The proposed FMU consists of a constant pressure drop valve and a metering valve, both of which are controlled by servovalve. Linear analysis derived from a nonlinear mathematical model of FMU is carried out to find major parameters on the system performance. Numerical results using established model of FMU were in good agreement with the experimental results. It is also shown that the system stability is improved by reducing the constant pressure drop at metering valve and applying the triangular orifice to constant-pressure-drop valve through the simulation and experiments.

A Study on the Design and Modeling of PWM Fuel Metering Unit for Miniature Turbo Engines (초소형 터보엔진용 PWM 연료조절장치의 설계 및 모델링에 관한 연구)

  • Joo Sang-Hyun;Choi Ho-Jin;Park Jong-Seung;Lim Jin-Shik
    • Journal of the Korean Society of Propulsion Engineers
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    • v.10 no.2
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    • pp.95-101
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    • 2006
  • A fuel metering unit using PWM(Pulse Width Modulated) solenoid valve has some advantages such as low cost, small size and simple structure. The mathematical model and its experimental rig of the fuel metering unit using PWM solenoid valve and CPDV(Constant Pressure Drop Valve) for miniature turbo engines were constructed. As the results of simulation, some major parameters which have dominant effects on the performance were found. And the experimental results verified the validity of established model by showing the good agreement with the numerical simulation results. Hence, this system modeling could be used effectively in the actual development of a PWM fuel control system.

A Study on the Development of Fuel Metering Unit for Air Breathing Engine (공기흡입식 추진기관용 연료조절밸브시스템 개발에 관한 연구)

  • Lee, Do-Yun;Choi, Hyun-Young;Park, Jong-Seung;Koo, Ja-Yoeng
    • Journal of the Korea Institute of Military Science and Technology
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    • v.8 no.4 s.23
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    • pp.152-158
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    • 2005
  • In this paper, we have proposed a fuel metering unit of ai breathing engine. The proposed valve system consists of a constant pressure drop valve and a metering valve, which are controlled by servovalve. We carried out nonlinear and linear analysis, computer simulation and experimentation to find effects of some factors on system performance. Analysis and experimental results show a good agreement. It is also shown that the system stability is affected by pressure drop of metering valve and inlet pressure of injectors.