Torsional damper for electrically-variable transmission with lock-out clutch assembly
US7226384B2 · kind B2 · utility
5Cited by
6References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H3/728
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a torsional damper for an electrically-variable transmission. The torsional damper is equipped with a lock-out clutch to directly couple the engine to the input shaft of the transmission. The electric motors provided with the electrically-variable transmission can serve to effectively cancel out engine compression pulses when the springs of the torsional damper are locked out. The present invention also includes damper springs of variable rates to effectively attenuate distinctive or inconsistent torque fluctuations when the engine is operating in displacement-on-demand mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.