Power transmission device and vehicle in which power transmission device is installed
US8894521B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Oct 1, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66272
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A power transmission device includes a belt-type continuously variable transmission; a first fluid pressure cylinder; a second fluid pressure cylinder; a pressure-adjustment and pressure-feed device; a fluid outflow/inflow device; and a control unit that controls the pressure-adjustment and pressure-feed device based on a fluid pressure that is obtained from a thrust that is required for the second pulley in accordance with a driving state and that, by controlling the pressure-adjustment and pressure-feed device in this manner, controls the fluid outflow/inflow device such that a gear ratio is varied within a permitted gear ratio range in accordance with the fluid pressure that is pressure-fed from the pressure-adjustment and pressure-feed device in conjunction with the pressure adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.