Closed-loop feedback control and reduction of the torque converter clutch slip for enhanced drivability for heavy tip-in maneuvers

US8332109B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Paul G. Otanez · Troy, US
• Chunhao J. Lee · Troy, US
• Farzad Samie · Franklin, US
• Scott A. Hearld · Waterford, US
• Xu Chen · Apex, US
• Daniel J. Wickman · Plymouth, US
• Xuefeng Tim Tao · Northville, US

Key dates

• Filing date: Jan 4, 2010
• Grant date: Dec 11, 2012
• Expiry date: Jan 16, 2031

Classification

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

Abstract

A method for responding to a rapid change in engine torque includes monitoring a change in engine torque and determining a rapid change in engine torque when the change in engine torque exceeds a threshold change in engine torque. Subsequent to determining a rapid change in engine torque, an increase in the torque converter slip is provided by reducing the torque converter clutch pressure command by a selected value and thereafter the feedback control is deactivated for a predetermined duration. Subsequent to the predetermined duration, the feedback control is reactivated to decrease the torque converter slip toward a desired torque converter slip value.