Vehicular belt-driven continuously variable transmission and control method thereof
US8517871B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2007 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Aug 17, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/66277
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a vehicular belt-driven continuously variable transmission, belt squeezing force is inhibited from becoming excessive and a safety factor, with respect to belt slip, of belt squeezing force applied to a transmission belt (48) is reduced to a value that is less than or equal to 1.5 by reducing a pressure receiving area (SOUT) of an output side hydraulic cylinder (46c). As a result, a centrifugal hydraulic pressure canceller chamber on a secondary pulley side (46) can be eliminated thus simplifying the structure of the vehicular belt-driven continuously variable transmission, while belt squeezing force can be appropriately controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.