Torque converter clutch control system health estimation

US10948079B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Shiming Duan · Ann Arbor, US
• Chunhao J. Lee · Troy, US
• Zhen J. Zhang · Beverly Hills, US
• Peter Paul Radecki · Coldwater, US
• Xiaodong Jia · Baofeng County, CN

Key dates

• Filing date: Aug 2, 2018
• Grant date: Mar 16, 2021
• Expiry date: Feb 13, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/145
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method of, and a system for, controlling and predicting the health of a torque converter clutch control system is provided. The method includes determining, via a controller, rotational input and output speeds of the torque converter and a torque converter clutch slip. The method also includes determining, via the controller, whether a set of predetermined conditions are met for predicting the health of the torque converter clutch control system. The method includes gathering a plurality of initial features of the vehicle propulsion system, determining statistical information about the plurality of initial features, and selecting at least one feature of the vehicle propulsion system based on the statistical information. Furthermore, the method includes classifying the health of the torque converter clutch control system based on the selected feature or features. In some forms, principal component analysis is used to select the feature or features used for classification.