金属带式无级变速器电液控制系统关键技术的研究

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1、湖南大学博士学位论文金属带式无级变速器电液控制系统关键技术的研究姓名：刘金刚申请学位级别：博士专业：车辆工程指导教师：周云山20081118金属带式无级变速器电液控制系统关键技术的研究踪中的波动问题，具有更好的稳态控制品质；在阶跃响应过程中，可有效降低超调量和过渡时间，具有更好的动态品质。5)不增加硬件成本和大计算量，对CVT控制系统夹紧力的在线故障诊断进行了探讨，提出了基于模型的故障诊断方法。基本策略：把系统全局的和局部的预测模型的输出与实际输出比较，根据残差就得出相应的诊断结果。通过人为制造的故障进行测试：结果表明所建立的故障自诊断系统具有较高的精度和反应速度，

2、对CVT的备用安全是非常有效的。关键词：金属带无级变速器；液压控制系统；优化设计；质量分类；广义预测控制：故障诊断n博上学位论文ABSTRACTThemetalpushingV-belttypecontinuouslyvariabletransmission(CVT)hastheadvantagesofsimpleandcompactstructure，excellentperformanceandeasyoperation，whichisanidealtransmissionformforeconomicalautomobiles．Developingcontin

3、uouslyvariabletransmissionbecomesacommonstandpointinautomatictransmissionindustrydomestically．Theelectro．hydrauliccontrolsystemisanimportantpartforthewholecontinuouslyvariabletransmission，whichiscomposedofTCU，hydrauliccontrolsystemandmechanism．Thekeytechnologiesoftheelectro-hydraulicco

4、ntrolsystemincludethefollowingsections：1，thedesignandtestmethodforthehydrauliccontrolsystem；2，thetestanddevelopmenttechnologyforproportionalelectromagneticvalve；3，thedesigntechnologyforspeedratiocontroller；4，thetechnologyofimprovingqualitystabilityandcoherence．Thispapermainlyfocusesont

5、heabove-mentionedkeytechnologiesresearch，andacquiresafewofachievementandinnovationasfollows．1)Thewholehydrauliccontrolsystemisdividedintothreesub．systemsintermsoftheirunattachedpressurelevels，whicharespeedshiftingmechanismcontrolsubsystem，clutchandtorqueconvertercontrolsubsystem，andlub

6、ricationandcoolingfluxdistributionsubsystem．Acomplicatedsystemisde．escalated，whichisintegratedbasedontheprincipleoffunctionmatching，andpatternsofthehydrauliccontrolmodulearemanufactured．ItiSshownfromthetable．boardtestresultsthattheprimaryperformanceindicessuchassteadypressure，dynamicpr

7、essureandtransientfluxofthehydrauliccontrolmoduleareadequatefortherequirementsofvehiclenormallyrunning．ItiSshownfromthevehicleroadtestresultsthatthehydrauliccontrolmoduleisadequateforthecontrolrequirementsofclampingforce，clutchandspeedratio．Theinfluenceoffluxdistributionresultfromthe