公开(公告)号：US06832977B2

公开(公告)日：2004-12-21

申请号：US10335000

申请日：2002-12-31

申请人： Beong-Yeol You

发明人： Beong-Yeol You

IPC分类号： F16H6102

CPC分类号： F16H61/0021 ,  F16H59/24 ,  F16H59/36 ,  F16H59/72 ,  F16H61/0437 ,  F16H61/14 ,  F16H61/686 ,  F16H2059/366 ,  F16H2059/385 ,  F16H2061/0087 ,  F16H2061/0462 ,  F16H2342/044 ,  Y10T477/693964 ,  Y10T477/693973

摘要： The hydraulic control system includes a driving condition detection unit, a transmission control unit, and a driving unit. The driving condition detection unit detects driving conditions of a vehicle. The transmission control unit performs variable line pressure control using a minimum line pressure and a line-pressure-decreasing gradient calculated based on driving condition data detected by the driving condition detection unit when the driving conditions satisfy variable line pressure control entrance conditions. The driving unit adjusts a duty ratio of line pressure applied to friction elements according to a line pressure control signal generated by the transmission control unit.