公开(公告)号：US06554742B2

公开(公告)日：2003-04-29

申请号：US09747487

申请日：2000-12-21

申请人： Jeffrey S. Milender ,  Thomas G. Lykken ,  Bradley A. Kuczmarski

发明人： Jeffrey S. Milender ,  Thomas G. Lykken ,  Bradley A. Kuczmarski

IPC分类号： F16H6104

CPC分类号： F16H61/08 ,  F16H59/14 ,  F16H59/52 ,  F16H61/061 ,  F16H2059/147 ,  F16H2061/0096 ,  F16H2061/026 ,  F16H2061/062 ,  F16H2302/06 ,  Y10T477/6937 ,  Y10T477/69387

摘要： An apparatus and method for controlling a plurality of clutches in a powershift transmission. The transmission is coupled to an engine of an off-road vehicle. The method includes receiving a shift command having a shift direction. Clutch timing is selected based on the shift direction. Using the selected shift timing, on-coming clutches are engaged in sequence with disengagement of off-going clutches to achieve smooth shifting.