公开(公告)号：US20190017592A1

公开(公告)日：2019-01-17

申请号：US15648866

申请日：2017-07-13

Applicant: GM Global Technology Operations LLC

Inventor： Todd R. Berger ,  David C. Webert ,  Roberto Diaz ,  David H. Moiseev ,  Joseph V. Pittiglio ,  Dustin A. Nygaard

IPC: F16H61/12 ,  F16H61/30

CPC classification number: F16H61/12 ,  F16H59/08 ,  F16H61/30 ,  F16H63/3483 ,  F16H63/48 ,  F16H2061/1208 ,  F16H2061/1264 ,  F16H2061/1288 ,  F16H2300/18

Abstract: A method for controlling internal electronic range selection for an automatic transmission includes: confirming if a range change command has been ordered from a current transmission operating state; verifying expected performance from at least first and second mode valves and a park servo are present in the current transmission operating state prior to allowing a range change event; during the range change event: generating proactive commands including ordering a reduction in a hydraulic system pressure; and identifying if an unexpected event is detected; and following completion of the range change event confirming expected performance is obtained from at least the first and second mode valves and the park servo to achieve a driver intended state.

公开(公告)号：US10514094B2

公开(公告)日：2019-12-24

申请号：US15648866

申请日：2017-07-13

Applicant: GM Global Technology Operations LLC

Inventor： Todd R. Berger ,  David C. Webert ,  Roberto Diaz ,  David H. Moiseev ,  Joseph V. Pittiglio ,  Dustin A. Nygaard

IPC: F16H61/12 ,  F16H61/30 ,  F16H63/34 ,  F16H63/48 ,  F16H59/08

Abstract: A method for controlling internal electronic range selection for an automatic transmission includes: confirming if a range change command has been ordered from a current transmission operating state; verifying expected performance from at least first and second mode valves and a park servo are present in the current transmission operating state prior to allowing a range change event; during the range change event: generating proactive commands including ordering a reduction in a hydraulic system pressure; and identifying if an unexpected event is detected; and following completion of the range change event confirming expected performance is obtained from at least the first and second mode valves and the park servo to achieve a driver intended state.