http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조성우(S.W.Cho),최상민(S.M.Choi),배충식(C.S.Bae),노석홍(S.H.Noh) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
Measurement tecliniques were developed to quantify the instantaneous piston assembly friction force and the oil film thickness between the piston rings and the cylinder liner. That can be easily applied to small multi-cylinder production engine. The friction force and oil film thickness data were acquired under various operation conditions and for various oils in an SI four cylinder engine. In this study, friction force data were found to be more reliable in consequence of proper compensation. It was possible to measure oil film thickness on thin oil ring rails as well as compression rings. The results revealed that mixed lubrication is dominant in limited operating conditions where product of kinematic viscosity and mean piston speed is lower than 80xl0^-6m³/s2.<br/>
이충훈(C.H.Lee),최규훈(K.H.Choi),노석홍(S.H.Noh),정석호(S.H.Chung) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
A constant volume chamber which cotains water was rotated in order to simulate solid body rotating swirl in direct injection diesel engines. The swirl number of the chamber linearly depends on the rotating speed of the chamber. Emulsified fuel was injected into water. which simulate high fuel injection into a high pressure gaseous contant volume chamber. Visualization of the fuel spray developing process in D.I. diesel engine was investigated by this liquid injection technique. The effect swirl number on the spray tip penetration and break-up lenth was investigated by experiment and modelling. Dispersion characteristics of fuel spray was also investigated according to the swirl number.<br/> <br/>
소형 트럭용 글로우 플러그 보조 직분식 메탄올 엔진 개발
유철호(C.H. Yu),이종순(J.C.Lee),신동현(D.H.Shin),노석홍(S.H.Noh),강인식(I.S.Kang) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
NOx and Particulates from Diesel engines are the main causes of air pollution in city areas. However. the reduction of both NOx and Particulates simultaneously is not easily realized.<br/> Vehicles powered by Diesel-type Methanol engine are under development to reduce emissions and are under fleet test.<br/> Physical and chemical properties of Methanol are compared to use Methanol as a fuel in a Diesel-type engine. Ignition assistance systems in Diesel-type Methanol engine are also compared because ignition assistance system is needed due to poor self-ignition property of Methanol.<br/> The way to solve technical problems of Diesel-type Methanol engines are presented as follows; stable self-ignition property under wide operating conditions. combustion improvement, reduction of power consumption and reliability for glow plug by reservoir<br/> -type glow plug and by EGR at low load. combustion improvement and elevation of conversion rate of catalyst by throttling at no load, reduction methed of formaldehyde emission.<br/>
저압축 고팽창비 가솔린 기관용 수퍼차저의 과급 특성에 관한 연구
이창식(C.S.Lee),이기형(K.H.Lee),전문수(M.S.Chon),김영호(Y.H.Kim),김대식(D.S.Kim),최규훈(K.H.Choi),노석홍(S.H.Noh) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
This work deals with the performance characteristics of three lobe Roots type supercharger for the application of low compression and high expansion ratio gasoline engine. The performance test was conducted to obtain the drive power, volumetric efficiency, adiabatic efficiency, and the influence performance factors of supercharger. In order to obtain the supercharging characteristics of engine, the effect of operating conditions on the supercharging performance of low compression and high expansion ratio gasoline engine was investigated. The results show that the increase of supercharger speed and pressure ratio bring about the increase of drive power. The three lobe Roots type supercharger which was applied for this study is considered operating properly at the compression ratio less than 1.3 for the low revolution^ 5.000rpm)'. for the higher revolution, compression ratio high then 1.5 is recommended.<br/>
에어 제트 직기의 메인 노즐 유동에 관한 수치해석적 연구
임채민(C.-M. Lim),이호준(H.-J. Lee),노석홍(S.-H. Noh),이권희(K.-H. Lee),김희동(H.-D. Kim),전두환(D.-H. Chun) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
An air jet loom as one of shuttleless looms transports a yarn into warps using viscosity and kinetic energy of an air jet. A performance of this picking system depends on the ability of instantaneous inhalation/exhaust, the configuration of nozzle, the operation characteristics of a check valve, and so on. In the recent past many studies have been reported on an air jet discharged from the nozzle exit, but studies for understanding of the flow field characteristics associated with shear layer, and shock wave and boundary layer interaction in the nozzle were not conducted enough. In this paper, computational study was performed to explain the flow field in the air jet nozzle with an acceleration tube of a very small divergent angle. The result obtained from computational study show that the flow field in the air jet nozzle depends on the nozzle configuration and the length of acceleration tube.
류영(Y. Ryu),위신환(S. W. Wei),송영식(Y. S. Song),노석홍(S. H. Noh),최경호(G. H. Choi),이종태(J. T. Lee) 한국자동차공학회 1996 한국자동차공학회 학술강연초록집 Vol.1996 No.10
The instantaneous wan temperature and heat flux of the Piston crown, ring groove and land are measured and analyzed It was found that (i) the instantaneous wall temperature of the valve pocket, in the piston crown, is higher than that of the center of the crown and the edge of the crown is lowest; (ii) the instantaneous temperature of the top-ring groove and land are changed simi1ar to that of the piston crown, which are influenced by the behaivar of the piston ring; (iii) the distributions of the heat flux are not coincided with the wall surface temperature, which are depended on the f1ame distance, combustion condition, behavior of the piston ring and the state of cooling, etc
강우(W.Kang),박동규(D.K.Park),김현철(H.C.Kim),오박균(P.K.Oh),노석홍(S.H.Noh) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
This study aims at the optimal design of rotors and the development of screw type Supercharger for the passenger car. Based on the new rotor profile, an advanced Supercharger has been developed, which can achieve higher adiabatic efficiency and volumetric efficiency. The performance test of screw type Supercharger has achieved high efficiency and the durability on the bench of performance test has also been established to get reliability of Supercharger when it will adhere to gasoline engine.<br/>