System and method for managing a powertrain in a vehicle
US7870925B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2006 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Jun 1, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2552/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system and method for managing a powertrain in a vehicle determines a number of vehicle conditions, and compares them to predetermined conditions to determine whether a secondary axle of the vehicle should be automatically connected to or disconnected from the powertrain. In general, if the speed of the vehicle is above some predetermined speed threshold, the secondary axle is disengaged to increase fuel economy. Conversely, if the speed of the vehicle is below some predetermined threshold, the secondary axle is typically engaged to help maximize the capture of regenerative braking energy during a braking event. Additional vehicle conditions may be examined, and exceptions to the general rule utilized, to further enhance the control strategy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.