公开(公告)号：US11168785B1

公开(公告)日：2021-11-09

申请号：US17038726

申请日：2020-09-30

申请人： Hyundai Motor Company ,  Kia Motors Corporation

发明人： Bong Uk Bae ,  Sung Sik Choi ,  Kyung Moo Lee ,  Ki Bum Kim ,  Seong Min Son ,  Seul Chan Park ,  Se Hwan Jo ,  Min Jae Chai

IPC分类号： F16H59/70 ,  F16H59/72 ,  F16H61/02 ,  F16H59/68

摘要： A hydraulic pressure control method for a transmission includes determining whether a current shift range is among a plurality of shift ranges, setting a dither frequency of a pressure control solenoid valve of a hydraulic circuit for the transmission to a predetermined first frequency when the current shift range is a predetermined first range, and setting the dither frequency of the pressure control solenoid valve to a predetermined second frequency when the current shift range is a shift range other than the first range.