Method and apparatus for controlling wheel slip in a full-time four wheel drive vehicle
US4848508A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Oct 5, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S188/01
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A center differential offering a full-time two axle dirve system. The center differential includes a planetary gear set defining a first drive path which provides an effective torque split ration to the front axle of the vehichle which is several percent less than the minimum dynamic weight ratio on the front axle assembly. The center differential further includes a bidirectional clutch mechanism defining a second drive path for connecting the driving input to the front drive axle assembly with a drive ratio several percent more than the rear axle ratio. The effective torque split and drive ratios are selected as a function of vehicle weight distributionand tire data for a specific vehicle so as to effect a controlled transfer of torque between the first and second drive paths and before the affected axle assembly reaches its traction limit in any mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.