Method of controlling speed reduction ratio for a continuously variable speed transmission
US4913005A · kind A · utility
5Cited by
17References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/462
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The speed reduction ratio of a continuously variable speed transmission on a motor vehicle is controlled by continuously varying the speed reduction ratio in a range between a maximum speed reduction ratio and a minimum speed reduction ratio. A top limit speed reduction ratio corresponding to a speed of the motor vehicle and being higher than the minimium speed reduction ratio is set in a low vehicle speed range. The speed reduction ratio is controlled only between the maximum speed reduction ratio and the top limit speed reduction ratio in the low vehicle speed range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.