Invention Grant
- Patent Title: Method and apparatus for predicting operating health of a torque converter clutch
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Application No.: US15446595Application Date: 2017-03-01
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Publication No.: US10553043B2Publication Date: 2020-02-04
- Inventor: Shiming Duan , Chunhao J Lee , Farzad Samie
- 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: Quinn IP Law
- Main IPC: G07C5/08
- IPC: G07C5/08 ; F16D48/06 ; F16H61/14 ; F16H45/02

Abstract:
A method of predicting the health of and controlling a hydraulic pressure actuated torque converter lock-up clutch includes determining rotational input and output speeds of the torque converter. The method also includes determining a magnitude of the hydraulic pressure. The method additionally includes determining a level of performance of the clutch across multiple torque converter operating modes using the determined input and output torque converter speeds and the determined magnitude of the hydraulic pressure. The method also includes calculating a numeric state of health (SOH) coefficient of the clutch that quantifies a relative severity of degradation of a plurality of clutch characteristics across the multiple torque converter operating modes. Furthermore, the method includes executing a control action relative to the clutch when the calculated numeric SOH coefficient for specified torque converter operating mode(s) is less than a calibrated SOH threshold.
Public/Granted literature
- US20180253913A1 METHOD AND APPARATUS FOR PREDICTING OPERATING HEALTH OF A TORQUE CONVERTER CLUTCH Public/Granted day:2018-09-06
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