• Title/Summary/Keyword: Solenoid Injector

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A Study on Optimal Design of Direct Needle-driven Piezo Injector for Accomplishing Injection Pressure of 1800 bar (분사압력 1800 bar 실현을 위한 직접 니들구동방식 피에조 인젝터 설계 최적화 연구)

  • Han, Sangik;Kim, Juhwan;Ji, Hyungsun;Go, Junchae;Kim, Jinsu;Lee, Jinwook
    • Journal of ILASS-Korea
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    • v.21 no.3
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    • pp.121-129
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    • 2016
  • The advantages of the common rail fuel injection system architecture have been recognized since the development of the diesel engine. In common rail systems, a high-pressure pump stores a reservoir of fuel at high pressure up to and above 2000 bar. And solenoid or piezoelectric valves make possible fine electronic control over the fuel injection time and quantity, and the higher pressure that the common rail technology makes available provides better fuel atomization. In this study, the direct needle-driven piezo injector was investigated for accomplishing injection pressure of 1800 bar by optimal design by simplification of component and changing number of springs and plates of DPI. It was found that a direct needle-driven piezo injection system features the prototype DPI for passenger vehicle to operate at 1800 bar of injection pressure.

An Experimental Study on RCCI(Reactivity Controlled Compression Ignition) Combustion of Dual-fuel due to Injector Characteristics (인젝터 특성에 따른 2중 연료의 RCCI 연소에 관한 실험적 연구)

  • Sung, Ki-An
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.2
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    • pp.110-115
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    • 2012
  • This study describes the characteristics of combustion and exhaust emission in the special engine applying a fuel reactivity controlled compression ignition (RCCI) concept with two different energizing type (solenoid and piezoelectric) injectors for diesel injection. A diesel-gasoline mixed dual-fuel reactivity controlled compression ignition concept is demonstrated as a promising method to achieve high thermal efficiency and low emission in internal combustion engines for transportation vehicles. For investigating the combustion characteristics of RCCI, engine experiments were performed in a light-duty diesel engine over a range of injection timing and mixing rate of gasoline in mass. It was investigated that by increasing the nozzle hole diameter, increasing the combustion pressure and the net indicated mean effective pressure. $NO_x$ and soot can be reduced by advancing start of injection in 84 mixing rate of gasoline in mass. The resulting operation showed that light duty engine could achieve 48 percent net indicated efficiency and 191[g/kW-hr] net indicated specific fuel consumption with lower levels of nitrogen oxides and soot.

Study for Fire Examples of LPG Leakage Including Fuel hose, Injector and Pressure Regulator Connector in Vehicle (자동차 연료호스, 인젝터 및 압력조절기 연결부에서 LP 가스 누출에 의한 화재사례 고찰)

  • Lee, Il Kwon;Kook, Chang Hoo;Suh, Moon Won;Jung, Dong Hwa
    • Journal of the Korean Institute of Gas
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    • v.17 no.3
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    • pp.8-13
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    • 2013
  • The purpose of this paper is to study for fire example by fuel leakage in LPG Vehicle. At first example, the car was repaired the fuel line that was connected with pressure hose between fuel regulator and injector in engine. But the service man was not very tighten with regular torque. At a result, the gas leaked on hot parts of engine. It verified the production of fire by engine heat. At second example, when the repair man, after replacement the injector, inserted the injector in a assembling part of it, he didn't the transform condition of fixing part. Therefore, the tearing phenomenon of O ring producted the controlled leakage of fuel by the injector deflection. It found the fact that the fuel leaked with gap of O ring. At third example. the fuel-cut solenoid valve was lined with pressure regulator unit. But the service man didn't throughly certify the leaked work of connected parts after repaired it. As a result, it certified the fire by engine heating leaked liquefied petroleum gas. Therefore it have to minimize the fire production that the driver should do no problem to throughly manage the fuel system.

A Study on the Design of High-Frequency Jet Ventilator Using PLL system (위상동기루프 방식을 이용한 고빈도 JET환기장치의 설계에 관한 연구)

  • Lee, Joon-Ha;Chung, Jae-Chun
    • Journal of Yeungnam Medical Science
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    • v.6 no.2
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    • pp.63-70
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    • 1989
  • This paper describes to design and to examine the mechanical characteristics of high frequency jet ventilator. The device consists of Phase lock loop(PLL) system, solenoid valve driving control part and Air regulating system. This study is carried out by changing several factors such as endotracheal tube(E.T. tube)diameter, injector cannula diameter, 1%, and frequency(breaths/mim.) having direct effects on the gas exchange as well as parameters of the entrained gas by venturi effects, so as to measure the tidal volume and minute volume. This system characteristics were as follows : 1) Frequency : 6-594bpm 2) Inspiration time : 1-99% 3) Variance of input air pressure : 1-30PSI.

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An Investigation on Spray Characteristics of Diesel - DME with Change of Injection Pressure (분사압력 변화에 따른 디젤-DME연료의 다단분사 특성에 관한연구)

  • Jeong, Y.H.;Yang, J.W.;Oh, C.H.;Lim, O.T.
    • Journal of ILASS-Korea
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    • v.18 no.4
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    • pp.188-195
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    • 2013
  • An investigation on spray characteristics of fuels which diesel and di-methyl ether (DME) with change of injection pressure used the multi-injection in constant volume combustion chamber (CVCC). Diesel was already used famous fuel which we could use. DME showed similar features with diesel like as cetane number, auto-ignition temperature. High cetane number of diesel and DME could make possible to compression ignition. DME showed different atomization from diesel due to evaporating pressures and boiling points. Experiments were carried out in CVCC equipped with Delphi solenoid 6-hole type injector and the spray characteristics of diesel and DME were tested the various pre and pilot injection. Terms of injections and a number of injections in multi-injection has been controlled. Experiments were performed in 2 types that 1500 rpm, 2000 rpm and under the condition of injection ranging from 100 bar to 500 bar. From the results of this experiment diesel showed longer spray penetration than DME. That result showed different of atomization speed DME and diesel. Result of high injection pressure condition showed similar spray characteristics diesel and DME. After this investigation, new conditions and experiments using laser light to go forward and add the fuels like as the biodiesel and diesel and DME blend.

Development of a Non-contact Type Magnetic Signal Monitoring Equipment for Automotive Electric Devices (비접촉식 자동차 전장용 자기신호 측정 장치)

  • Yang, Hyong-Yeol;Yang, Seung-Hak
    • The Transactions of the Korean Institute of Power Electronics
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    • v.15 no.5
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    • pp.381-386
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    • 2010
  • A non-contact type magnetic signal monitoring equipment for automotive electric devices is proposed in this paper. There are many kinds of actuators in the car like solenoid, relay, motor, injector, etc which are operated by magnetic energy. It is difficult to find out whether the actuators operate well or not because the terminals of the actuators are combined to the connectors. In this paper a non-contact type magnetic signal monitoring equipment using Hall effect sensor is proposed to measure the magnetic signal of the actuators very easily to find out the actuators' operating status. The simulation and experimental results show that the developed equipment is very useful and has good performance.

Spray and Combustion Characteristics of Diesel and JP-8 in a Heavy-Duty Diesel Engine Equipped with Common-Rail Fuel Injection System (커먼레일을 장착한 대형 디젤엔진에서 디젤과 JP-8의 분무 및 연소특성 평가)

  • Jeon, Jin-Woog;Lee, Jin-Woo;Park, Jung-Seo;Bae, Choong-Sik
    • Proceedings of the KSME Conference
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    • 2008.11b
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    • pp.3019-3025
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    • 2008
  • An experimental study was performed to assess the effect of diesel and JP-8 aviation fuel on the spray characteristics, performance and emissions in a single cylinder optical diesel engine. Both fuels were injected via an 8-hole solenoid-driven injector in a common-rail injection system. For better understanding of spray development, the macroscopic images were captured with high speed camera, offered evidences for the results of performance and emissions. From macroscopic spray images, the spray tip penetration of JP-8 shorter than that of diesel while spray angle of JP-8 was wider than that of diesel. It indicates that the vaporization of JP-8 is superior to that of diesel. The lower cetane number of JP-8 resulted in increased portion of premixed combustion. The IMEP with JP-8 is lower than that of diesel-fueled engine. Especially, using JP-8 has a potential for reducing soot.

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