Method and apparatus for executing engine autostart in a powertrain system employing multiple torque generating devices

US9810190B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Meng Wang · Tanggu, CN
• Anthony Christman · Madison Heights, US
• Poh Fong Chin · Novi, US
• John Janczak · Wixom, US
• Anthony H. Heap · Ann Arbor, US
• Kee Yong Kim · Ann Arbor, US
• Bryan J. Morton · Saline, US
• Goro Tamai · Beverly Hills, US

Key dates

• Filing date: Apr 23, 2015
• Grant date: Nov 7, 2017
• Expiry date: Sep 3, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/93
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A powertrain system is described, and includes an internal combustion engine and an electric machine configured to generate propulsion torque responsive to a driver torque request. A method for operating the powertrain system includes determining, in response to a request to execute an engine autostart operation, whether a driveline torque sag may occur. The method further includes forgoing executing the engine autostart operation when it is determined that a driveline torque sag will occur during the execution of the engine autostart operation.