Enhanced Coasting LockUp of Torque （加强沿海禁售的扭矩）.pdfVIP

Proceedings of the World Congress on Engineering and Computer Science 2007 WCECS 2007, October 24-26, 2007, San Francisco, USA Enhanced Coasting Lock-Up of Torque Converter Clutch after Power-Off Up-Shift using Modified P-PI Control Dong-Yeon Lee, He-Hun Ju, Hyung-Suk Lee, Jun-Seong Rhee, Seung-Ho Lee, and Yong-No Lee at the same time, it is important to maintain a balance between Abstract—This paper presents a new coasting lock-up controller them. In this regard, hybrid vehicles are not equipped with for the torque converter clutch in automatic transmissions. It was torque converters [3] -[6]. developed to reduce engagement shock and fuel consumption Automobile manufacturers have adopted torque converter during coasting lock-up, especially when the engine speed drops clutches (TCC) to minimize the energy loss of torque after a power-off up-shift. P and PI controllers were sequentially adopted in the torque converter clutch control unit without using converters fluid flow in a high range of vehicle speeds, while torque or pressure sensors. In addition, a function of jump-down maximizing the torque multiplication effect in low and medium of command duty was implemented to compensate a sudden ranges. The TCC locks up the turbine (transmission) and the increase of engine speed with a high change rate, due to unstable impeller that is connected to the torque converter case (engine). hydraulic pressure. According to the test results in a real vehicle, If it is closed, the engine,