Ratio change control for transmission
US5021031A · kind A · utility
9Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Jul 27, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H37/021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hybrid continuously variable transmission includes a gearing mechanism and a continuously variable transmission mechanism which altenatively take over a drive. According to a ratio change control system, the continuously variable transmission mechanism is prevented from shifting operation until a transition from a drive owing to the gearing mechanism to a drive owing to the continuously variable transmission mechanism is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.