无级变速器 CVTCVT变速器的特点： 可以发挥发动机的最佳性能无级变速器（CVT）奥迪A6装用的CVT手手自动一体自动一体 换档手柄换档手柄带式CVT的技术难点传动带（传动扭矩的限制） 效率双离合器变速器DCT Dual Clutch Transmissionor DSG Direct Shift Gearbox双离合器变速器DamperDual ClutchEngine TorqueLubeClutchClutchPumpFilter Shift ActuatorClutch & Actuator ControlsSynchronization Systems“Odd “ ShaftTCU (Transmission Control Unit)Base Manual Transmission13524 R6Differential“Even “ Shaft双离合器变速器DCT Dual Clutch Transmissionor DSG Direct Shift Gearbox全油门开度下2 至 3 的换档过程32DnouterDninnerpouterpinnernMotorMTransm.湿式双离合器干式双离合器DCT Clutch System双离合器技术难点双离合器技术难点 双离合器控制双离合器控制33.033.534.034.50246810121416pc2 pc3 /barC1 C2双离合器换档过程DCT 换档品质控制 DCT Electro-Hydraulic Controls Dual Clutch TransmissionsDerived from new generation MTs 6-speeds Ratio range 6:1 Target Markets Europe - C, C/D classes Diesel applications Other mkts. TBD OEMs Volkswagen - 03 Opel / Saab / Fiat - 05 Ford (GFT) - 06? DQ 250装有双离合器的奥迪TT装有双离合器的国产GOLF67档双离合器变速器Relative Advantages by Transmission TypeAMT Most efficient option Low comfort (torque break) DCT Near AMT efficiency No major deficiencies CVT Best in comfort (no “shifts”) Risk and cost are concerns 6AT Comfort at low risk & low cost Least efficient alternative燃油消耗比较重量比较成本增加