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AMESim을 이용한, GDI 엔진에서 연료의 분사조건 변화에 따른 분사량 변화 예측
신석신 ( Suk Shin Shin ),손진근 ( Jin Geun Song ),박종호 ( Jong Ho Park ) 한국분무공학회 2013 한국액체미립화학회지 Vol.18 No.1
In case of GDI engine, shape of injected mass are one of the most important factors for good fuel eff-ciency and power. But it should be too inefficient and difficult to acquire injection mass data by experiment because condi-tion in engine vary with temperature, pressure, and so on. So, this paper suggests the AMESim (Advanced Modeling Environment for Simulation of Engineering Systems) as simulation program to calculate injection mass. For both simulation and experiment, n-heptane is used as fuel. In AMESim, I modeled the GDI infector and simulated several cases. In experi-ment, I acquired the injection mass using Bosch method to apply ambient pressure. The AMESim show reasonable result in comparison with experimental data especially at injection pressure 15 MPa. Other conditions are also in good accord with experimental data but error is a little bit large because the injection mass is so low.
이용범(Yong Bum Lee),신석신(Suk Shin Shin),박종호(Jong Ho Park) 한국신뢰성학회 2013 신뢰성응용연구 Vol.13 No.1
For a reliability assessment of large machinery parts, reliable data should be obtained from testing many samples for a long time. However, in case of testing these samples, testing cost is excessive; in case of life test for long time, power consumption is high; and in case of accelerated test by over load, very high cost is required to build the life testing device. Especially it is very frequent that the expensive device"s life has ended during a accelerated test by over load. In this study, the design mechanism of the life testing device which excels in energy saving during the reliability test of large machinery parts has been introduced.