Differential control system for four-wheel drive vehicle
US5178231A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1991 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Jan 18, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K23/0808
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A four-wheel drive vehicle has a center differential which transmits the output torque of a power plant to both front and rear wheels in such a manner as to permit the front and rear wheels to rotate at different speeds. A differential control system has a differential rotation limit member which acts on the center differential to limit differential rotation of the front and rear wheels to a degree which is determined according to the difference in rotational speed between the front and rear wheels. The degree of limitation on the differential rotation of the wheels is determined according to the difference in rotational speed between the front and rear wheels based on first characteristics when the rotational speed of the front wheels is higher than that of the rear wheels and based on second characteristics when the rotational speed of the rear wheels is higher than that of the front wheels. The first and second characteristics are set separately from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.