http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A STUDY ON THE ENGINE PERFORMANCE OF A SPARK IGNITION ENGINE ACCORDING TO THE IGNITION ENERGY
한성빈 한국에너지학회 2014 에너지공학 Vol.23 No.3
The more or less homogeneous fuel-air mixture that exists at the end of the compression process is ignitedby an electric ignition spark from a spark plug shortly before top dead center. The actual moment of ignitionis an optimization parameter; it is adapted to the engine operation so that an optimum combustion process isobtained. Brake mean effective pressure (BMEP) of the spark ignition energy control device (IECD) thanconventional spark system at the stoichiometric mixture is increased about 9%. For lean burn engine, the leanlimit is extended about 25% by using the IECD. It was considered the stability of combustion by the increaseof flame kernel according to the high ignition energy supplies in initial period and discharge energy periodlengthen by using the IECD.
한성빈 한국에너지학회 2015 에너지공학 Vol.24 No.3
Homogeneous charge compression ignition (HCCI) engine combines the combustion characteristics of a compression ignition engine and a spark ignition engine. HCCI engines take advantage of the high compression ratio and heat release rate and thus exhibit high efficiency found in compression ignition engines. In modern research, simulation has be come a powerful tool as it saves time and also economical when compared to experimental study. Engine simulation has been developed to predict the performance of a homogeneous charge compression ignition engine. The effects of compression ratio, cylinder pressure, rate of pressure rise, flame temperature, rate of heat release, and mass fraction burned were simulated. The simulation and analysis show several meaningful results. The objective of the present study is to develop a combustion characteristics model for a homogeneous charge compression ignition engine running with isooctane as a fuel and effect of compression ratio.
EXPERIMENTAL STUDY ON LIQUEFIED PETROLEUM GAS FUELED HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE
한성빈 한국자동차공학회 2013 International journal of automotive technology Vol.14 No.6
EGR (Exhaust Gas Recirculation) is one of the most effective techniques currently available for reducing NOx emissions from compression ignition engines but its application to LPG (liquefied petroleum gas) fueled HCCI (Homogeneous Charge Compression ignition) engine is yet to be widely implemented. The objective of this research is to determine the effects of EGR on the combustion processes of HCCI-LPG engine. Butane and propane were used for the LPG fueled HCCI engines. For this purpose, a 4-cylinder, compression ignition engine was converted into a HCCI-LPG engine, and a heating device was installed to raise the temperature of the intake air and also to make it more consistent. In addition, a pressure sensor was inserted into each of the cylinders to investigate the differences in characteristics among the cylinders.
스파크 점화기관의 열유속 및 열전달 계수에 대한 실험적 연구
한성빈,권영직,이성렬,Han, Seong-Bin,Gwon, Yeong-Jik,Lee, Jeong-Yeol 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.11
In order to design and develop a spark ignition engine, many studies must be preceded about the characteristics of thermal flow. For measurement of transient wall temperature thin film thermocouples of Bendersky type were manufactured and these probes were fixed into the wall of combustion chamber. Surface wall temperatures were measured in experiments of various engine speeds. Transient heat fluxes were calculated from the wall temperature measurements. Pressure was measured from combustion chamber using pressure transducer and gas temperatures were calculated using the state equation of ideal gas. And instantaneous heat transfer coefficients were obtained. It will be the basic data for the formulae of instantaneous heat transfer coefficients.
한성빈,장용훈,Han, Sung-Bin,Chang, Yong-Hoon 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.5
Cyclic variability has long been recognized as limiting the range of operating conditions of spark ignition engines, in particular, under lean and highly diluted operation conditions. The cyclic combustion variations can be characterized by the pressure parameters, combustion parameters, and flame front parameters. The coefficient of variation in indicated mean effective pressure ($COV_{IMEP}$) defines the cyclic variability in indicated work per cycle, and it has been found that vehicle driveability problems usually result when $COV_{IMEP}$ exceeds about 10%. For analysis of the cyclic variability in SI engines at idling, the results show that cyclic variability by the $COV_{IMEP}$ or the coefficient of variation in maximum pressure can be explained and may be consequently reduced by the help of the optimum spark timings.
한성빈,권영직,이성렬,Han, Seong-Bin,Gwon, Yeong-Jik,Lee, Jeong-Yeol 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.11
A new empirical formula for instantaneous heat transfer coefficients was determined. The determination of this formula is in need for prediction of instantaneous value of heat transfer coefficients to analyze in more detail the time variation of heat transfer rate from gas to wall in combustion chamber of a spark ignition engine. As the result, following formula was determined. h=687 $p^{0.75}$ $U^{0.75}$ $D^{0.25}$ - $T^{-0.465}$ U(.theta.)=O.494 $V_{p}$ +0.73*10$^{6}$ (1.35 p dV/d.theta.+V dp/d.theta.) Using this empirical formula, the instantaneous heat transfer coefficients of gas in the combustion chamber of spark ignition engine was predicted and compared with experimental values.
스파크 점화기관의 점화에너지 변화와 연소 변동과의 관계에 관한 연구
한성빈,Han, Seong-Bin 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.12
The cyclic variations can be characterized by the variations in different type of parameters. These parameters may be grouped into four main categories: pressure-related parameters, combustion-related parameters, flame front-related parameters, and exhaust gas-related parameters. One of the resultant effects of the cycle-by-cycle variation in the combustion process, which is the most important with regard to the engine performance characteristics, is the cycle-by-cycle variation in IMEP. This paper uses the repetitive discharge igniter, which can change the ignition energy easily, to study on idle stability in a spark ignition engine. From this device, the 6 number of spark and 0.20 ms spark interval, it is very available for the idle stability.
한성빈,문성수,이성열 대한기계학회 1994 대한기계학회논문집 Vol.18 No.1
The oil crises in 1973 and 1978 stimulated the alternative fuel research activities in many countries around the world. Among the alternative fuels, methanol is one of the highest potential fuels for transportation. Methanol has been considered for use as automotive fuel, but it has a defect of the great latent vaporization heat. Therefore, authors have made the fuel vaporizing device in order to eliminate the fuel film flow heating the mixture. This paper presents a study on the characteristics of vaporization, engine performance, and emission which result from using the fuel vaporizing device.