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Development of port fuel injected methanol(M85)-fuelled two-wheeler for sustainable transport

Journal of Traffic and Transportation Engineering(English Edition) 2020年第3期7卷 298-311页

作者： Tushar Agarwal akhilendra pratap singh Avinash Kumar Agarwal Engine R esearch Laboratory Department of Mechanical EngineeringIndian Institute of Technology KanpurKanpur 208016India

Due to increasingly stringent environmental pollution norms,there is a need for alternate combustion techniques and alternate fuels to keep up with changing trends.One of the viable solutions for India is the adaptation of methanol as a fuel for automotive sector.Therefore,in this study a functional two-wheeler prototype was developed,which uses M85(85%v/v methanol and 15%v/v gasoline)in an electronic control unit(ECU)controlled port fuel injected(PFI)engine.This study included comparative investigations of simulated on-road two-wheeler performance on chassis dynamometer using a gasoline-fuelled motorcycle with stock ECU vis-a-vis M85-fuelled motorcycle using recalibrated ECU.ECU recalibration exhibited that M85-fuelled vehicle was operated at relatively more advanced spark timing compared to baseline gasoline-fuelled vehicle.Performance results showed that M85-fuelled motorcycle produced relatively higher engine power and higher maximum vehicle speed compared to gasoline-fuelled motorcycle.Relatively superior acceleration characteristics(especially at higher speeds)of M85-fuelled motorcycle was another important finding of this study,indicating that M85 provided superior throttle response compared to gasoline.Comparative analysis of raw tailpipe emissions showed that modified M85-fuelled motorcycle emitted relatively higher hydrocarbon(HC),carbon monoxide(CO)and oxides of nitrogen(NO_x)emissions compared to stock gasoline-fuelled motorcycle.However,these emissions can be controlled by using adaptation of suitable after-treatment systems.

关键词： Methanol Electronic control unit(ECU) Electronic fuel injection(EFI) ECU calibration Engine performance Emission

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Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

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Frontiers of Structural and Civil Engineering 2015年第4期9卷 359-382页

作者： Himanshu PATHAK akhilendra singh I.V. singh S. K. YADAV Department of Mechanical Engineering Shiv Nadar University Gautam Buddha Nagar 201314 India Department of Mechanical Engineering liT Patna Patna 800013 India Department of Mechanical and Industrial Engineering HT Roorkee Roorkee 247667 India

This paper deals with the fatigue crack growth simulations of three-dimensional linear elastic cracks by XFEM under cyclic thermal load. Both temperature and displacement approximations are extrinsically enriched by Heaviside and crack front enrichment functions. Crack growth is modelled by successive linear extensions, and the end points of these linear extensions are joined by cubic spline segments to obtain a modified crack front. Different crack geometries such as planer, non-planer and arbitrary spline shape cracks are simulated under thermal shock, adiabatic and isothermal loads to reveal the sturdiness and versatility of the XFEM approach.

关键词： 3-D cracks fatigue life Paris law thermal load XFEM

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