Methods and system for transitioning between control modes while creeping

US9573579B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Rajit Johri · Ann Arbor, US
• Francis Thomas Connolly · Ann Arbor, US
• Wei Liang · Farmington Hills, US
• Bernard D. Nefcy · Novi, US
• Xiaoyong Wang · Sunnyvale, US
• Mark Steven Yamazaki · Canton, US
• Ming Lang Kuang · Canton, US
• Jeffrey Allen Doering · Canton, US

Key dates

• Filing date: Jul 30, 2014
• Grant date: Feb 21, 2017
• Expiry date: Nov 18, 2034

Classification

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

Abstract

Systems and methods for transitioning a torque source between speed control and torque control modes during a vehicle creep mode are disclosed. In one example, torque of an electric machine is adjusted in response to a torque converter model. The torque converter model provides for a locked or unlocked torque converter clutch.