Independent control of transmission-side and engine-side retarding devices during ratio changes
US6223592A · kind A · utility
21Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/54
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system include independently controlling at least one engine-side retarding device and at least one transmission-side retarding device. The retarding devices are selectively actuated to increase the decay rate of the engine speed and/or transmission input shaft speed during an upshift. Engine-side retarding devices may include an engine brake or operation of various engine accessories to increase engine loading. Transmission-side retarding devices may include input shaft brake or driveline retarder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.