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X. LU,Z. HUANG,W. ZHANG,D. LI 한국자동차공학회 2005 International journal of automotive technology Vol.6 No.1
The purpose of this paper is to experimentally investigate the engine pollutant emissions and combustion characteristics of diesel engine fueled with ethanol-diesel blended fuel (bio-diesohol). The experiments were performed on a single-cylinder DI diesel engine. Two blend fuels were consisted of 15% ethanol, 83.5% diesel and 15% solublizer (by volume) were evaluated one without cetane improver (E15-D) and one with a cetane improver (E15-D+CN improver). The engine performance parameters and emissions including fuel consumption, exhaust temperature, lubricating oil temperature, Bosch smoke number, CO, NOx, and THC were measured, and compared to the baseline diesel fuel. In order to gain insight into the combustion characteristics of bio-diesohol blends, the engine combustion processes for blended fuels and diesel fuel were observed using an Engine Video System (AVL 513). The results showed that the brake specific fuel consumption (BSFC) increased at overall engine operating conditions, but it is worth noting that the brake thermal efficiency (BTE) increased by up to 1-23% with two blends when compared to diesel fuel. It is found that the engine fueled with ethanol-diesel blend fuels has higher emissions of THC, lower emissions of CO, NOx, and smoke. And the results also indicated that the cetane improver has positive effects on CO and NOx emissions, but negative effect on THC emission. Based on engine combustion visualization, it is found that ignition delay increased, combustion duration and the luminosity of flame decreased for the diesohol blends. The combustion is improved when the CN improver was added to the blend fuel.
ZhEng, D. W.,Huang, Y. P.,Tang, T. A.,Cui, Q.,Li, A. Z.,Zhou, S. X.,He, Z. J.,Chen, Z.,Zhang, X. J.,Kwor, R. 대한전자공학회 1993 ICVC : International Conference on VLSI and CAD Vol.3 No.1
A novel process for silicon on insulator(SOI) technology has been presented. Single crystal Si is grown by molecular beam epitaxy(MBF) on a porous silicon(PS) system consisting of two layers of PS with different microstructures. Subsequent lateral oxidation converts the structure to SOI wish excellent insulation property. Si islands with a width of 135㎛ and low doping concentration have been achieved.
D. N. Chen,L. Huang,H. Y. Yu,X. C. Zhong,Z. W. Liu 한국자기학회 2019 Journal of Magnetics Vol.24 No.3
Soft magnetic composites (SMC) based on FeSiB amorphous alloys have been widely used in various electric devices. However, the amorphous powders are difficult to press, and the prepared cores exhibit low mechanical strength with high porosity. In this work, untreated and phosphated Fe powders with mean particle size of 70μm were added into FeSiB powders with mean size of less than 25μm to improve the performance of the SMC. The FeSiB/Fe SMCs are fabricated by cold pressing. The results show that the amplitude permeability of FeSiB/Fe SMCs increases with the increase of Fe content. However, the addition of untreated Fe powder leads to increased magnetic loss. On the contrary, the addition of phosphated iron powder can not only enhance the amplitude permeability but also effectively reduce the core loss. Hence, the addition of phosphated iron powder provides a good way to modify the soft magnetic properties of FeSiB/Fe SMC for AC application.