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| 1 | Identification of Axial Vibration Excitation Source in Vehicle Engine Crankshafts Using an Auto-regressive and Moving Average Model显示文摘Violent axial vibration of a vehicle engine crankshaft might lead to multiple defects to the engine.Much research on mechanism and control measures has been done on engines,such as using the dynamic stiffness matrix method,rayleigh differential method,and system matrix method.But the source of axial vibration has not been identified clearly because there are many excitation factors for the axial vibration of a crankshaft,such as coupled torsional-axial vibration and coupled bending-axial vibration,etc.In order to improve the calculation reliability and identify the excitation source of axial vibration of in vehicle engine crankshafts,this paper presents a method to identify the axial vibration excitation source of crankshafts for high speed diesel engines based on an auto-regressive and moving average(ARMA) model.Through determining initial moving average variables and measuring axial /bending/torsional vibrations of a crankshaft at the free-end of a 4-cylinder diesel engine,autoregressive spectrum analysis is applied to the measured vibration signal.The results show that the axial vibration of the crankshaft is mainly excited by coupled bending vibration at high speed.But at low speed,the axial vibration in some frequencies is excited primarily by torsional excitation.Through investigation of axial vibration source of engine crankshafts,calculation accuracy of vibration can be improved significantly. | LIANG Xingyu WANG Yuesen SHU Gequn WEI Haiqiao DONG Lihui MEI Yifan | 2011 | Chinese Journal of Mechanical Engineering2011，24，6： | 3 |
| 2 | Experimental study of the influence of a pour point depressant additive on particle size distributions in diesel engine exhausts显示文摘Many studies have been performed on diesel engine particulate matter emissions, but the influence of lubricants on emissions has only been considered a few times, and the effects of lubricant additives have yet to be investigated. We studied the influence of a pour point depressant additive(PPD) on particle emissions and particle size distributions from a four-cylinder turbocharged, inter-cooled engine with CF-415W-40 lubricant, using diesel or diesel containing the PPD. Changing the working conditions changed the number of particles emitted and the location of the peak particle size(s) emitted. The number of particles first increased and then decreased as the engine speed increased. Particle emissions were optimal at low engine speeds and high load, increasing with increasing engine speed. | Xingyu Liang Yuesen Wang Lihui Dong Gequn Shu Changwen Liu | 2014 | Particuology2014，12，2： | 2 |
| 3 | SOS1 gene overexpression increased salt tolerance in transgenic tobacco by maintaining a higher K + /Na + ratio显示文摘 | Yuesen Yue Mingcai Zhang Jiachang Zhang Liusheng Duan Zhaohu Li | 2011 | Journal of Plant Physiology2011，，3： | 1 |
| 4 | Gasoline engine exhaust gas recirculation – A review显示文摘 | Haiqiao Wei Tianyu Zhu Gequn Shu Linlin Tan Yuesen Wang | 2012 | Applied Energy2012，，： | 1 |
| 5 | Research on Electro-hydraulic at Control System for Hydraulic Support Coal Mine 显示文摘 | Yu Yuesen Dai Peng Xu Yajun etc | 2009 | Procedia Earth and Lanetary Science2009，，1： | 1 |
| 6 | A practical method for solving the ignition delay of small solid rocket motor显示文摘 | ZHANG Qiufang HU Changyu LI Yuesen | 2003 | Theory and Pratice of Energetic Materials2003，5，： | 1 |
| 7 | A Practical method for solving the ignition delay of small solid rocketmotor显示文摘 | ZHANG Qiufang HU Changyu LI yuesen | 2003 | Theory and Practice of Energetic Materials2003，5，： | 1 |
| 8 | Vacuum brazing TiAl intermetallic to K4169 alloy using amorphous filler metals Ti_(56.25–x)Zr_(x)Ni_(25)Cu1_(8.75)显示文摘A series of Ti_(56.25-x)Zr_(x)Ni_(25)Cu1_(8.75)(x=0–25,at.%) filler metals were designed based on a cluster-plus-glue-atom model to vacuum braze TiAl intermetallic to K4169 alloy. The impact of Zr content on the interfacial microstructure and shear strength of joints was examined. And the relationship between the interfacial lattice structure and the fracture behavior of the joint was investigated. The findings reveal a sectionalized characteristic with three reaction zones (Zone I, Zone II and Zone III) in the microstructure of the TiAl intermetallic to K4169 alloy joint. As the Zr content in filler metals increased, the diffusion of Ti transitioned from long-distance to short-distance in Zone I, changing the initial composition from TiNi_(3) /TiNi/NiNb/(Cr, Fe, Ni)SS to NiCrFe/(Cr, Fe, Ni)SS /TiNi. In Zone II, the initial composition altered from TiNi_(3) /TiNi to TiNi/Ti_(2) Ni/TiNi_(3) /TiCu/TiNi. The interface between Zones II and III altered from a non-coherent and semi-coherent interface of TiNi/TiAl/Ti_(3) Al with significant residual stress to a semi-coherent interface of TiNi/TiNi_(3) /TiAl_(2) /Ti_(3) Al with a gradient distribution. The shear strength of the joint initially decreased and then increased. When the Zr content of filler metal was 25 at.%, the shear strength of the joint reached 288 MPa. The crack initiation position changed from non-coherent TiNi/TiAl interface with high angle grain boundaries (HAGBs) and lattice mismatch of 65.86 at.% to a semi-coherent Ti3 Al/TiAl2 interface with a lattice mismatch of 20.07 at.% when the Zr content increased. The brittle fracture was present on the fracture surfaces of all brazed joints. | Liangliang Zhang Honggang Dong Peng Li Shuai Li Baosheng Wu Yueting Ma Libing Huang Chao Li Jiachen Li Yuesen Yang | 2023 | Journal of Materials Science & Technology2023，，23： | 0 |
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