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1、毕业论文论文题目:自动变速器换挡品质研究摘要变速器在汽车诞生的百年历史中在不断地与时俱进。手动变速器由于其传递动力的直接与高效性,加上制作技术的成熟与低成本,现代汽车中装备手动变速器的汽车仍然占有很大比例。但随着人们对汽车舒适性要求越来越高,现代汽车自动变速器装备率越来越高却是一个不争的事实,尤其是当自动变速器也逐渐能够兼顾操控性的时候。从发展趋势上来看,自动变速器是采用简单的液力传动与多档机械自动变速器组合,在控制方式上,由于动—半自动—全自动—电子操纵控制系统,并向智能化方向发展,自动变速器的档位数从二速—三速—四速,五速自动变速器也即将出现,同时利用各种方法,扩大与改善液力传动的自动调
2、节性能范围,以实现简化操纵的目的。本文讨论了汽车自动变速器的类型,介绍了液力机械式、机械无级变速器、电控机械式、双离合自动变速器4种自动变速器的原理、特点、关键技术和发展状况,分析了影响自动变速其换挡品质的因素。关键词:自动变速器,换挡品质,影响因素AbstractThetransmissioninthecarwasbornahundredyearsofhistoryintheconstantlyadvancingwiththetimes.Themanualtransmissionbecauseofitspowertransmissiondirectandefficient,coupledw
3、iththeproductiontechnologyandlowcost,themodernvehiclesequippedwithmanualtransmissioncarstillaccountforalargeproportionof.Butaspeopleontheridecomfortofincreasinglyhighdemand,modernautomotiveautomatictransmissionequipmentratemoreandmorehighisanindisputablefact,especiallywhentheautomatictransmissionis
4、capableofbothhandlingtime.Judgingfromthedevelopmenttrend,automatictransmissionistheuseofsimplehydraulictransmissionwithmultiplemechanicalautomatictransmissionassembly,thecontrolmode,duetothedynamic,semi-automatic,fullyautomatic,electroniccontrolsystem,andtodeveloptheintelligent,automatictransmissio
5、ndigitfromtwospeed-threespeed-fourspeed,fivespeedautomatictransmissionalsowillappear,atthesametimeusingavarietyofmethods,expandandimprovethehydraulicdriveautomaticregulatingperformancerange,inordertoachievethepurposeofsimplifiedmanipulation.Thispaperdiscussestheautomobileautomatictransmissiontype,i
6、ntroducedhydraulicmechanical,mechanicalCVT,electriccontrolmechanicaltype,dualclutchautomatictransmission4kindsofautomatictransmissionprinciple,characteristics,keytechnologyanddevelopmentstatus,analysisoftheimpactofthefactorsonthequalityofautomatictransmissionshift.KeyWords:automatictransmission,shi
7、ftquality,influencefactors目录1引言12汽车变速器概述12.1手动变速器12.2自动变速器12.3直接换挡变速器33自动变速器的构造与分类43.1自动变速器的构造43.1.1液力变矩器43.1.2变速齿轮机构43.1.3供油系统53.1.4自动换挡控制系统53.1.5换挡操纵机构53.2自动变速器的分类63.2.1按汽车驱动方式分类63.2.2按前进档的档位数分类63.2.3按齿轮变