Engine torque truncation method for a four-wheel drive vehicle
US7395891B2 · kind B2 · utility
2Cited by
16References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2005 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jul 16, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K17/35
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A four wheel drive powertrain control for an automotive vehicle is disclosed. It includes a torque transfer case that distributes power from an engine-powered transfer case mainshaft to a secondary driving axle through a friction clutch as power is distributed directly from the engine-powered mainshaft to a primary driving axle. The friction clutch capacity is sufficient to mechanically lock the transfer case in a four wheel drive mode. If the clutch torque capacity is exceeded, a control algorithm will strategically ramp down engine torque requests by a powertrain controller to eliminate clutch slip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.