Method of controlling speed reduction ratio for a continuously variable speed transmission
US4962679A · kind A · utility
10Cited by
16References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/46
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The speed reduction ratio of a continuously variable speed transmission is controlled by setting a reference engine speed according to a parameter representing a driver's intention of acceleration, such as the depression of an accelerator pedal, and controlling the speed reduction ratio so as to equalize the engine rotational speed with the reference engine speed. When the parameter is lowered such as by releasing the accelerator pedal, the process of controlling the speed reduction ratio due to a reduction in the reference engine speed caused by the reduction in the parameter is started after a certain time delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.