Methods and systems for improving hybrid vehicle efficiency
US9802604B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2014 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | May 29, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/93
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for operating a driveline of a vehicle includes adjusting operation of an electric machine to provide a torque difference between a driver demand torque and an engine output torque, when the electric machine is not operating in an operating range in which electric machine efficiency is less than a threshold efficiency. The operating range has a first, positive torque limit defining a positive extent of the operating range and a second, negative torque limit defining a negative extent of the operating range. In response to the torque difference being within the operating range and greater than zero, the torque output of the electric machine is maintained at the first torque limit, whereas in response to the torque difference being within the operating range and less than zero, the torque output of the electric machine is maintained at the second torque limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.