Method and apparatus for controlling clutch deactivation in a multi-mode powertrain system
US8801574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2012 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Feb 5, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A powertrain system includes an internal combustion engine, a multi-mode transmission having a plurality of torque machines, and a driveline. A method for deactivating a torque transfer clutch of the multi-mode transmission includes imposing prioritized clutch torque constraints to an off-going clutch. The constraints include minimum and maximum long-term desired clutch torque constraints that are superseded by minimum and maximum soft clutch torque constraints that are superseded by minimum and maximum short-term desired clutch torque constraints that are superseded by minimum and maximum hard clutch torque constraints. The off-going clutch is controlled in response to the prioritized clutch torque constraints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.