Control of power-on downshifts in a multiple-ratio powertrain for a hybrid vehicle
US7223201B2 · kind B2 · utility
20Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2004 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Sep 2, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/945
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for controlling engagement and release of friction clutches in a multiple-ratio transmission for a hybrid electric vehicle powertrain uses electric motor torque to augment engine torque as a power-on downshift is commanded. Near the end of a downshift event, total powertrain torque is modulated or reduced to reduce torque disturbances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.