Full clutch slip power shift of a dual clutch transmission
US9556955B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2015 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Apr 10, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system for operating a dual clutch transmission, including launch/creep controller, shift logic, and a clutch control assembly. The shift logic is configured to intercept a torque command including a target clutch torque from the launch/creep controller as it transmits the target clutch torque to the clutch assembly. The shift logic engages a preparation phase that increases torque on an on-coming clutch to a prefill torque. The shift logic then engages a torque phase that transfers torque between the off-going clutch and the on-coming clutch by simultaneously decreasing the off-going clutch torque and increasing the on-coming clutch torque. The off-going clutch and the on-coming clutch remain in a slipping state that maintains the target clutch torque during the transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.