Automotive Transmission Control and Driveline （汽车传动系统控制和动力传动系统）.pdf

Automotive Transmission Control and Driveline Dynamics Zongxuan Sun and Kumar Hebbale Research and Development Center General Motors Corporation Z. Sun and K. Hebbale GM Research and Develop ment Center Automotive Transmission Technologies • Step gear automatic transmission • Manual transmission • Starting clutch/friction launch transmission • Automated manual transmission • Continuously variable transmission • Electrical variable transmission Z. Sun and K. Hebbale GM Research and Develop ment Center Step Gear Automatic Transmission • Increasing number of speeds • Migrate to clutch to clutch shift Torque Converter Clutches Planetary Gear Set Torque Converter Clutch 4 Speed Transmission 6 Speed Transmission Z. Sun and K. Hebbale GM Research and Develop ment Center Starting Clutch/Friction Launch Transmission • For better fuel economy and possible lower cost, a starting clutch is used to replace the torque converter • Clutch slip control is critical to achieve desirable drivability T f ( , P) T :Torque : Friction coeff icient Vslip f (P) Vslip : Slip sp eed P:Pressure Z. Sun and K. Hebbale