Adaptive K-factor to improve stall-torque management

US5935042A · kind A · utility

Assignee

• Chrysler Group LLC · US

Inventors

• Christopher P. Thomas · Beverly Hills, US
• Kathryn Wolfe · Sterling Heights, US
• Bruce H. Teague · Grosse Pointe Park, US
• O. Kent Thiel · Chelsea, US
• Howard W. Krausman · Dexter, US

Key dates

• Filing date: May 18, 1998
• Grant date: Aug 10, 1999
• Expiry date: May 18, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60W2710/0644
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method is provided for adaptively determining a torque-related (K-factor) value for a torque converter in a vehicle and providing adaptive torque management to an automatic transmission. The torque-related K-factor value is computed for a given torque converter as a function of engine speed and difference in torque measured with the vehicle operating in idle neutral and drive. The vehicle dynamically learns the K-factor value and manages torque applied to the transmission by limiting the engine output speed as a function of the learned torque-related K-factor and vehicle speed.