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1、上海交通大學(xué)碩士學(xué)位論文自動(dòng)變速器換檔品質(zhì)研究姓名：卓鵬申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：車(chē)輛工程指導(dǎo)教師：何維廉20070301上海交通大學(xué)碩士論文的模型進(jìn)行了適當(dāng)?shù)暮?jiǎn)化，從而建立起自動(dòng)變速器換檔過(guò)程的等效簡(jiǎn)明力學(xué)模型，推導(dǎo)出換檔過(guò)程的一般運(yùn)動(dòng)方程。依據(jù)所建立的簡(jiǎn)化模型，對(duì)換檔過(guò)程的搭接控制、油壓變化規(guī)律進(jìn)行分析，獲得許多對(duì)提高換檔品質(zhì)有益的控制結(jié)論。應(yīng)用MATLAB-SIMULINK建立自動(dòng)變速器動(dòng)力傳動(dòng)系統(tǒng)的仿真模型，分別對(duì)AG4自動(dòng)變速器2H-3H升檔過(guò)程和3H-2H降檔過(guò)程進(jìn)行了分析。仿真結(jié)果證明了模型的正確性，并且驗(yàn)證了對(duì)換檔結(jié)合元件合理的油壓變化規(guī)律控制可以顯著的提高換檔品質(zhì)。仿真特別
2、研究了滑摩功大小的影響因素，指出減小換檔過(guò)程滑摩功的方法。關(guān)鍵詞：自動(dòng)變速器，換檔品質(zhì)，油壓-v-上海交通大學(xué)碩士論文ThestudyontheshiftqualityofautomatictransmissionABSTRACTAsthedevelopmentofautomobiletechnology,theconvenienceandcomfortarehighlydesiredbypeople,somoreandmoreautomatictransmissionsareinstalledtocars.Automatictransmissionisthemainpartoftheve
3、hicledrivingsystem,soithasmuchinfluenceontheperformanceofthevehicle.Automatictransmissionshiftupanddownthroughthejointandwithdrawingoftheunitecomponents,sotheshiftprocessisactuallytheprocessjointingandwithdrawingoftheunitecomponents.Becauseofthedifferentspeedratios,thestateofthedrivingsystemhasasu
4、ddenchange,butthejointcomponentscan’tactintime;Andatsometimethefrictionmomentofthecomponentschange;AllThesewillcauseaimpactofthevehicleandtheincreaseofthecomponentstemperature.InthispapertheinfluenceofAutomatictransmission’sshiftprocesstovehicledrivingsmoothness,drivesystemloadandthelifeoftheunite
5、componentsisanalyzed.Theevaluationmethodandindexofshiftqualityareintroducedfromsubjectiveandobjectivepoints.Alsothemethodstoimprove-vi-上海交通大學(xué)碩士論文theshiftqualityarebroughtforwardbasedontheinfluencingfactors.Itwillsimplifythestructureoftheplanetgeartoapplytheleveranalogytoplanetgearsystem,andthedyna
6、micsequationsareeasytoget.Thedynamicsmodeloftheautomatictransmission’sshiftprocessisbuiltupthroughsimplifyingtheengine-torqueconvertermodel.Sothedynamicsequationsareobtainedfromthemechanicsmodel.Theshiftprocessandtheoilpressureregulationsarestudiedandmanyconclusionsaregottoimprovetheshiftquality.T
7、hesimulationmodelisbuiltupbythesoftwareMATLAB/SIMULINK.AG4’sshiftupprocess(2H-3H)andshiftdownprocess(3H-2H)arestudiedbasedonthismodel.Thesimulationresultsprovethatthemodelisvividandthereasonableoilpressurecanhigh
