Invention Grant
- Patent Title: Methods and systems for controlling transmission in neutral
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Application No.: US17654183Application Date: 2022-03-09
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Publication No.: US11543024B1Publication Date: 2023-01-03
- Inventor: Bryan John Williams , Greg Perantoni , Matthew Pruski
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Agency: Lorenz & Kopf LLP
- Main IPC: F16H61/02
- IPC: F16H61/02 ; F16H59/42 ; F16H59/72 ; F16H61/12 ; F16H59/44 ; F16H59/70

Abstract:
Systems and methods are provided for controlling a transmission associated with a vehicle. The method includes receiving a neutral range selection for the transmission, and receiving a temperature and a pressure of a lubricant associated with the transmission. The method includes receiving a speed of an input shaft associated with the transmission, and determining, by a processor, based on the temperature and the speed of the input shaft, a pressure threshold value for the lubricant. The method includes outputting, by the processor, one or more control signals to command the transmission to a one clutch neutral state in which one clutch of a plurality of clutches associated with the transmission is engaged based on a comparison of the pressure threshold value to the pressure of the lubricant.
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