Continuously variable transmission with cooling structure for speed-change control actuator
US7474949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Nov 20, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0009
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A continuously variable transmission for an automotive vehicle, including a power train whose speed ratio is variably changeable in accordance with an oil pressure signal from a control valve assembly. A mechanical feedback mechanism is provided including an actuator for speed-change control operable in accordance with an electric signal. The actuator has a solenoid section. A speed-change control valve is provided to control an oil pressure to be supplied to the power train. A speed ratio sensor is provided to be moved in mechanical relation to a part of the power train in accordance with a change in the speed ratio of the power train. A linking member is provided to link the actuator, the speed-change control valve and the speed ratio sensor. Additionally, an oil bath is provided to contain oil in which at least a part of the solenoid section of the actuator is immersed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.