【作者】 张颖；

【导师】 桂良进； 杜素果；

【作者基本信息】 清华大学 ， 车辆工程（专业学位）， 2017， 硕士

【摘要】 本文以国内外汽车燃油系统管路的发展历程及现状为依据,以现阶段客户、市场需求以及相关管材开发标准为指标,在当今燃油复杂化,发动机小型化、车辆轻量化、排放环保化的情况下,研究开发了满足目前汽车市场多样化需求的低析出、低渗透燃油管路系统,并推广应用。主要研究工作如下:首先,调研了国内外高分子材料加工尼龙管材在汽车领域应用的历史、发展及现状,以及燃油系统管路目前的市场需求和发展方向。结合不同种类高分子材料的特性,深入剖析能够满足未来客户及市场需求的材料和结构。结合对应标准中硬性指标进行材料选择,并对材料能够组合的结构进行确认,开展了低析出、低渗透燃油管路系统技术可行性研究。然后,开展了低析出、低渗透管材的研究与开发工作。通过深入剖析原材料各项物性,来排除干扰项,对具备低析出、低渗透性能的,可应用于燃油系统的管材结构和材料进行开发,经过针对各种材料的加工工艺参数摸索、管材现场调试、调试管材机械性能确认、性能不符合标准要求管材重新调整工艺参数等多次循环,最终完成满足低析出、低渗透管路要求的管材开发试制工作。最后,进行了管材理化性能确认和优化设计。通过DOE实验设计优化、管材全工艺性能验证等过程,最终开发出可以满足市场针对燃油系统管路的低析出、低渗透标准要求的多层复合管材,以及由它们所组成的燃油管路总成系统。本文研究工作可以为主机厂及诸如油箱厂一类的一级供应商提供满足目前市场需求的具备低析出、低渗透性能的应用于燃油系统的管路产品,对提高燃油管道的综合性能和普遍适用性具有重要意义。更多还原

【Abstract】 This research subject use the development history and current situation of fuel line system at home and abroad as the basis,the present customers and market demand and standard of pipe development as indicators,in the context of today’s complex fuel,decrescent engines,lightweighted cars,environmentally friendly vehicle emissions,research and development tubes which can fulfill the diverse needs of the current automobile market with low extractable and low permeability performance and promoted them.The main research work is as follows:First of all,investigation and research the history,development and present situation of the application of polymer materials in the automotive industry,and the current market demand and development direction of the fuel line system.The researchers combined with the characteristics of different types of polymer materials,in-depth analysis the materials and structures which can meet the future needs of customers and market.Combined with the corresponding standard rigid index for material selection,designed the structure which can be made of the material we have confirmed.,the researchers carried out the low emission,low permeability fuel pipeline system technical feasibility study.And then,the research and development work of low extractable and low permeability pipes were carried out.After eliminating the interference of the materials’ different performance,we develop low extractable and low permeability pipe structure and material which can be used in the fuel system.After the technical discussion and analysis the development feasibility of the pipe producing,production commissioning,confirming the pipe physicochemical properties,readjust the process parameters of the pipes which performance does not meet the standard requirements for many cycles.Finally,the work of development and trial production of the pipe which can fulfill the requirements of low extractable and low permeability pipeline is completed.Finally,the work of confirming the pipe physicochemical properties and optimizing pipes performance by design of experiment(DOE)was carried out.After optimizing pipes performance by design of experiment and performance verification of whole process of pipe production,we developed multilayer composite tube fulfilling standard requirement and meeting the marke demand which are using in fuel system with low extractable and low permeability performance,and pipeline assembly system which are consists of this pipes in the end.This research work can provide pipeline products which can fulfill the market demand with low extractable and low permeability performance in fuel system to the host plant and tier one suppliers such as tank factory,it has important significance to improve the performance of the fuel pipeline and general applicability.更多还原