• Title/Summary/Keyword: Plunger stroke

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A Study on Effect of Quill Accumulator upon Performance of Motor-driven Cylinder Lubricator in a Large Two-stroke Diesel Engine (대형 2행정 디젤기관용 모터구동 실린더 주유기의 성능에 미치는 퀼 어큐뮬레이터의 영향에 관한 연구)

  • Bae, Myung-Whan;Ok, Hyun-Jin;Jung, Hwa
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.2
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    • pp.115-125
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    • 2007
  • Minimizing the cylinder wear and the consumption rate of cylinder oil in a large two-stroke marine diesel engine is of great economic importance. In Korea, a motor-driven cylinder lubricator for a large two-stroke marine diesel engine manufactured by $W{\ddot{a}}rtsil{\ddot{a}}$ Switzerland Co., Ltd. was first developed by authors through the joint research of industry-university in 2002. The characteristic of the developed product is that can control automatically the oil feed rate to a load fluctuation by the motor drive and the offset cam. The performance of the product is not also inferior to the conventional one. For manufacturing the reliable and useful products, however, it is necessary to investigate further characteristics and improve the performance of a cylinder lubricator. In this study, the effect of quill with and without accumulator on maximum discharge pressure, delivery delay duration and oil feed rate relative to motor revolution speed using plunger stroke as a parameter is experimentally investigated by using the developed cylinder lubricator. It is found that the maximum discharge pressure with accumulator is higher than that of no accumulator as plunger stroke and motor revolution speed are elevated, and the delivery delay duration with accumulator is shorter than that of no accumulator as plunger stroke and motor revolution speed are increased. Also, oil feed rate with accumulator is less than that of no accumulator except for a plunger stroke of 2 mm as plunger stroke and motor revolution speed are raised.

A Study on Effect of Cylinder Back Pressure on Feed Rate and Delivery Characteristics of Motor-driven Lubricator in a Large Two-stroke Diesel Engine (대형 2행정 디젤기관의 모터구동 주유기 유량 및 송출 특성에 미치는 실린더 배압의 영향에 관한 연구)

  • Bae Myung-whan;Jung Hwa;Ok Hyun-jin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.5
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    • pp.19-28
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    • 2005
  • It is of great economic importance to minimize the cylinder wear and the consumption rate of cylinder oil in a large two-stroke diesel engine. The motor-driven cylinder lubricator was first developed fur a large two-stroke marine diesel engine made in $W{\ddot{a}}rtsil{\ddot{a}}a$ Switzerland Ltd. by the joint research of industry-university. In this study, the effects of revolution speed, plunger stroke and cylinder back pressure on maximum discharge and delivery pressures, delivery delay duration, and oil feed rate are experimentally investigated by the home-manufactured cylinder lubricator. The maximum discharge pressure with a spot of 0.03 m and the maximum loss pressure at spots of 5, 6.78 and i 0 m away from the end of lubricator slot are increased as plunger stroke, revolution speed and back pressure are elevated, and the delivery delay duration is shortened as plunger stroke, revolution speed and oil pipe length are increased. Also, oil feed rate is increased as plunger stroke and revolution speed are raised, but lowered as the back pressure is increased.

A Study on Feed Rate Characteristics of Motor-driven Cylinder Lubricator with Electronic Control Quill in a Large Two-stroke Diesel Engine (대형 2행정 디젤기관에 있어서 전자제어 퀼 부착 모터구동 실린더 주유기의 송출유량 특성에 관한 연구)

  • Bae, Myung-Whan;Jung, Hwa;Jung, Yeun-Hak;Kim, In-Deok;Kang, Chang-Ho
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.6
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    • pp.1-8
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    • 2007
  • Minimizing the cylinder wear and the consumption rate of cylinder oil in a large two-stroke marine diesel engine is of great economic importance. In Korea, authors first developed a motor-driven cylinder lubricator for a Wartsila Switzerland large two-stroke diesel engine. The characteristic of the developed product is that can control automatically the oil feed rate with a load fluctuation by the motor drive and the offset cam. For manufacturing the reliable and useful products, however, it is necessary to investigate further characteristics and to improve performances as a cylinder lubricator. In this study, the effects of pump motor speed, plunger stroke and cylinder back pressure on oil feed rate, maximum discharge and delivery pressures are experimentally investigated by using the electronically controlled quill injection system and distributer in the developed cylinder lubricator. It is found that the oil feed rates of electronic control and mechanical type quills with the in-cylinder back pressure are differently characterized by the role of accumulator, the viscous resistance of contact area, etc. It can be also shown that the maximum discharge pressure of the electronic control quill is lower than the mechanical type one but the maximum discharge pressure difference of two types decreased as plunger stroke is small, and the maximum delivery pressures of two types increased as plunger stroke, motor speed and back pressure are elevated but the maximum delivery pressure of mechanical type is higher than the one of electronic control type.

A Study on the Taper Plunger Type Proportional Electromagnet for ISC Valve (ISC 밸브용 테이퍼 플런저형 비례전자석에 관한 연구)

  • Song, Chang-Seop;Lee, Tae-Hyeong;Yun, Jang-Sang
    • Journal of the Korean Society for Precision Engineering
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    • v.10 no.3
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    • pp.125-132
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    • 1993
  • On this study, magnetic force versus input currents is analyzed by modeling taper plunger type proportional electromagnet of ISC valve using the permernce method. And, the reliabiliy of simulation is verified by comparing the experimental values with the calaulate magnetic force. From the result of this study, it is found that the taper angles at plunger and core, the length of air gap between plunger and yoke are the prumary factors in designing taper plunget type proportional electromagnet. Magnetic force is decreased as a whole according to increasing the air gap between pluger and yoke, and vise versa. But, the magnetic force is not proportional to current, when the air gap is very small. In case of decreasing the taper angle of pluger, the stroke range of plunger where magnetic force is proportional to current becomes farther from core.

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Non-Magnetic Ring Effect for Speed Increase of Solenoid Actuator

  • Sung Baek-Ju;Lee Eun-Woong
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.5B no.4
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    • pp.317-323
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    • 2005
  • To increase the operating speed of the solenoid actuator, this paper proposed a modified model using a non-magnetic ring, which is welded on the magnetic guide tube, and also presents the characteristic equations, results of Finite Element Method (FEM) analysis for magnetic flux distribution and density in magnetic flux paths, and computer simulation results for the dynamic characteristics of plunger motion according to the stroke and time variation. As well, we proved the non-magnetic ring effect by experiments using prototypes.

A Study on Feed Rate Characteristics of Motor-driven Cylinder Lubricator by the Electronically Controlled Quill System Equipped with an Accumulating Distributor in a Large Two-stroke Diesel Engine (대형 2행정 디젤기관에 있어서 축압분배기 부착 전자제어식 퀼 시스템 모터구동 실린더 주유기의 송출유량 특성에 관한 연구)

  • Bae, Myung-Whan;Jung, Hwa;Bae, Chang-Hwan
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.4
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    • pp.91-98
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    • 2011
  • Minimizing the cylinder wear and the consumption rate of cylinder oil in a large two-stroke diesel engine is of great economic importance. A motor-driven cylinder lubricator for Sulzer RT-flex large two-stroke diesel engines developed by authors is in need of mounting a quill system to lubricate cylinder parts for smoother operation. In order to apply the common-rail lubricating system to the developed cylinder lubricator as the second research stage, the quill system with a progressively quantitative distributor is improved in the electronically controlled quill system with an accumulating distributor. In this study, the effects of lubricator motor speed, plunger stroke and cylinder back pressure on oil feed rate, maximum discharge and delivery pressures are experimentally investigated by using the electronically controlled quill system with an accumulating distributor in the developed cylinder lubricator. It is found that the oil feed rate of the electronically controlled quill system with an accumulating distributor is larger than that of the quill system with a progressively quantitative distributor because of the increase of delivery speed and volume by changing the location of accumulator in the same experimental condition.

A Study on Inequality Rate of Lubrication for Motor-driven Cylinder Lubricator by the Electronically Controlled Quill System Equipped with an Accumulating Distributor in a Large Two-stroke Diesel Engine (대형 2행정 디젤기관용 축압분배기 부착 전자제어식 퀼 시스템 모터구동 실린더 주유기의 주유 불균일률에 관한 연구)

  • Bae, Myung-Whan;Jung, Hwa;Bae, Chang-Hwan
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.3
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    • pp.26-36
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    • 2012
  • Minimizing the cylinder wear and the consumption rate of cylinder oil in a large two-stroke diesel engine is of great economic importance. A motor-driven cylinder lubricator for Sulzer RT-flex large two-stroke diesel engines developed by authors is in need of mounting a quill system to lubricate cylinder parts for a smooth operation. In order to apply the common-rail lubricating system to the developed cylinder lubricator as the second research stage, the mechanical quill system with a progressively quantitative distributor (M.D.S.) is improved in the electronically controlled quill system with an accumulating distributor (E.D.S.). In this study, the effects of lubricator motor speed, plunger stroke and cylinder back pressure on oil feed rate and inequality rate are experimentally investigated by applying E.D.S. to the developed cylinder lubricator. It is found that the oil feed rate of E.D.S. is higher than that of M.D.S. because of the increase of delivery speed and volume by changing the role of accumulator in the same experimental condition. It can be also shown that, in E.D.S., the inequality rate is decreased a little or hardly unchanged as the cylinder back pressure and plunger stroke is elevated, while the inequality rate increased in M.D.S.. The inequality rates of E.D.S. and M.D.S. are lowered as the lubricator motor speed is increased.

Analysis of Dynamic Characteristics for High speed Plunger-type Solenoid (고속 플런저형 솔레노이드의 동특성 해석)

  • 백동기;성세진
    • The Transactions of the Korean Institute of Power Electronics
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    • v.2 no.1
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    • pp.26-32
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    • 1997
  • In this paper, numerical analysis of dynamic characteristics for the plunger-type solenoid was used for a high speed solenoid valve with fast switching is discussed. The theoretic analysis of the electromagnetic field including eddy currents in the solenoid is studied by using permeance. The optimum value of design parameters which are a mass and an area of the plunger, a source voltage, a elastic modulus of the spring, a stroke, a number of turns, are obtained by the results of the investigation on effect of a parameter on others. And dynamic characteristics of acting solenoid that is the variation of magnetic force, displacement, solenoid current are investigated.

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Characteristic Analysis and experiment of the Low Power Consumption type Micro Valve (초절전형 마이크로 밸브 특성해석 및 실험)

  • Kim, D.S.;Park, S.W.;Kim, H.S.;Yoo, J.S.;Lee, W.H.
    • Proceedings of the KSME Conference
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    • 2004.11a
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    • pp.876-881
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    • 2004
  • In this study, A special quality analysis and experiment for low power consumption type pneumatic on-off micro valve was performed. And flow characteristics of the micro valve by stroke change was numerically investigated. As a result, it is shown that magnetic force(2.4N) is exerted enough to move poppet with 0.3mm stroke with 0.01 seconds of response time, and that there is no magnetic force emitted by yoke. Under the condition of poppet stroke smaller than about 0.8mm, dynamic pressure acts to poppet wall up to supply pressure level. But, that is decreasing to 40% when poppet stroke is 0.8mm.

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Analysis and Design of the Low Power Consumption type Micro Valve (초절전형 마이크로 밸브 해석 및 설계)

  • Kim D.S.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.1 no.2
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    • pp.15-19
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    • 2004
  • In this study, Design and simulation for low power consumption type pneumatic on-off micro valve was performed. And flow characteristics of the micro valve by stroke change was numerically investigated. As a result, it is shown that magnetic force(6.8N) is exerted enough to move poppet with 0.438mm stroke with 0.01 seconds of response time, and that there is no magnetic force emitted by yoke. Under the condition of poppet stroke smaller than about 0.4mm, dynamic pressure acts to poppet wall up to supply pressure level. But, that is decreasing to 40% when poppet stroke is 0.8mm.

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