Continuously variable vane-type transmission with regenerative braking
US5655369A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2039/105
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A continuously variable transmission, which allows recovering braking energy from a vehicle for later use in accelerating the vehicle and/or engine starting, includes a vane type pump and stator in a case, each with flexible cam rings. The pump cam ring and the stator cam ring can both be flexed to change the displacement of the pump and the stator. A first connection establishes fluid communication between a tapering volume sector of the pump swept volume and a tapering volume sector of the stator unit working volume, and a second connection establishes fluid communication between a flaring volume sector of the pump swept volume and a flaring volume sector of the stator unit working volume. A valve is connected to the first and second connections and a hydraulic accumulator. The valve can establish communication between the hydraulic accumulator and the second connection to pressurize the hydraulic accumulator with fluid pressurized in the flaring volume sector of the stator working volume and the pump swept volume by the pump cam ring overdriving the pump rotor, thereby storing energy from the vehicle in the accumulator. Or the valve can establish communication between the hydrau…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.