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西安航空职业技术学院毕业论文论文题目：汽车电动助力转向系统所属系部：dddddddddd指导老师：ssssss职称：aaaaa学生姓名：xx班级、学号:xxxxxxxx专业：ssasdas西安航空职业技术学院制2011年4月25日西安航空职业技术学院毕业设计论文1汽车电动助力转向系统【摘要】本论文主要阐述了汽车电动助力转向系统在我们的生活当中汽车使用过程中带来的方便作用和它的工作原理以及维护维修方法。汽车工业作为我过的支柱产业，在国民经济中起着重要作用。汽车转向器作为汽车的重要零部件，其性能的好坏直接影响着汽车行驶的安全性和可靠性。我国在发展汽车零部件的政策规划中，已将转向器列为优先发展的25种汽车关键零部件之一。随着世界上电子技术的迅猛发展，汽车转向系统已经从传统机械转向、液压助力转向、电控液压助力转向，发展到电动助力转向系统（ElectricHydraulicPowerSteering，简称EPS），最终还将要过渡到线控转向系统。汽车电动助力转向系统是现代汽车中比较常规的配置，是一种直接依靠电机提供辅助扭矩的动力转向系统。主要是由于它的工作效率高，能量消耗少；系统内部采用刚性连接，反应灵敏，滞后小，驾驶员的“路感”好；结构简单，质量小；系统便于集成，整体尺寸减小，省去了油泵和辅助管路，总布置更加方便；无液压元件，对环境污染少。EPS将最新的电力电子技术和高性能的电机控制技术应用于汽车转向系统，能显著改善汽车动态性能和静态性能、提高行驶中驾驶员的舒适性和安全性、减少环境污染等。因此，该系统一经提出，就受到许多大汽车公司的重视，并进行开发和研究。关键词：电动助力安全性可靠性效率高消耗少反应灵敏Abstract:Thecaptionmainlyexpoundstheautoelectricpowersteeringsysteminourlifecaruseprocesstheconvenienceanditsroletheworkingprincipleandmaintenancemethod.TheautoindustryasIhadapillarindustry,inthenationaleconomyplaysanimportantrole.Automobileredirectorofcarpartsasimportant,theperformanceofadirectimpactonthesecurityandreliabilityofthecar.Indevelopingautomobilepartspolicyplanning,alreadywillsteeringgearasprioritydevelopmentof25kindsofoneofthekeyautomotivespareparts.Withtheworldontherapiddevelopmentofelectronictechnology,autoSteeringsystemhavetraditionalmechanicalandHydraulicSteeringfromPowerSteering,ElectriccontrolHydraulicPowerSteering,thedevelopmentoftheElectricPowerSteeringsystem西安航空职业技术学院毕业设计论文2(ElectricHydraulicPowerSteering,theabbreviationEPS),eventuallywilltransitiontothewirecontrolSteeringsystem。Theautoelectricpowersteeringsystemisthemoderncarrelativelyroutineconfiguration,isadirectrelyonmotortorquetoprovideauxiliarypowersteeringsystem.Ismainlyduetoitshighefficiency，lessenergyconsumption;Theinternalsystemrigidconnection，sensitivereaction,lag,thepilotofthesmallwayfeeling;Simplestructure，qualityissmall;Systemcanreducetheoverallintegration,sizeandtelltheoilpumpandauxiliarypiping,generalarrangementmoreconvenient;Nohydrauliccomponents,lessontheenvironmentalpollution.EPSwillthelatestpowerelectronictechnologyandhighperformanceofmotorcontroltechnologyapplicationinautomobilesteeringsystem,canimprovethedynamicperformanceandcarstaticperformance,improvethedrivingcomfortandsafetypilot,reducethepollutionoftheenvironment,etc。Therefore,thesystemisputforward,gettheattentionofmanylargecarcompany,anddevelopmentandresearch。Keywords:Electricpower;safety;reliability;efficiencyhighconsumption;sensitivereaction.西安航空职业技术学院毕业设计论文1目录1汽车电动助力转向系统的结构..........................................................................................................11.1电动液压助力转向系统..............................................................................................................11.1.1电动液压助力转向主要零部件..........................................................................................11.1.2电动液压助力转向系统工作原理......................................................................................21.2电动直接助力式转向系统..........................................................................................................21.2.1电动直接式助力转向系统主要零部件..............................................................................31.2.2电动直接式助力转向系统工作原理..................................................................................41.3电动助力转向系统优缺点..........................................................................................................41.3.1优点.......................................................................................................................................41.3.2缺点.......................................................................................................................................51.4汽车电动助力转向系统的关键技术...........................................................................................51.5汽车电动助力转向系统工作过程...............................................................................................61.6本章小结......................................................................................................................................72汽车电动助力转向系统类型..............................................................................................................82.1转向柱助力式..............................................................................................................................82.2小齿轮助力式..............................................................................................................................82.3双小齿轮助力式..........................................................................................................................82.4齿条助力式..................................................................................................................................82.5本章小结......................................................................................................................................93汽车电动助力转向系统的维护保养................................................................................................103.1转向系统检查..............................................................