Method and apparatus for managing torque in a hybrid powertrain system
US8452473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2011 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Jul 11, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A powertrain system includes an internal combustion engine and an electric machine coupled via a torque transfer device to a transmission. A method for operating the powertrain system to transfer torque to a driveline includes establishing an operating torque security limit that is a default torque security limit. The operating torque security limit is set to an override limit when engine speed is less than a threshold speed. A torque security fault is detected only when a combined torque output from the internal combustion engine and the electric machine to the torque transfer device deviates from an operator torque request by an amount greater than the operating torque security limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.