On-demand transfer case with synchronized range shift and adaptive clutch control
US6398688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Jun 18, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K17/3467
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A full-time power transfer system is disclosed to include a transfer case having a clutch assembly arranged to control speed differentiation and torque biasing across an interaxle differential, sensors for detecting and generating sensor signals indicative of various dynamic and operational characteristics of the vehicle, and a controller for controlling actuation of the clutch assembly in response to the sensor signals. Upon the occurrence of traction loss, the clutch assembly is automatically actuated for limiting interaxle slip while transferring increased drive torque to the non-slipping driveline. Under a preferred adaptive control scheme, the actuated condition of the clutch assembly is controllably modulated between its non-actuated and fully-actuated limits for automatically varying the magnitude of speed differentiation and torque biasing across the interaxle differential in response to changes in the dynamic and operational characteristics of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.