Hydraulic system of a transmission device with a lubrication circuit
US9435422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2014 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Nov 20, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87362
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic system of a transmission device with a lubrication circuit, which is supplied with hydraulic fluid downstream of a cooling device for cooling and lubrication, is described. One part of the volume flow of hydraulic fluid led through the cooling device is able to be discharged downstream of the cooling device and upstream of the lubrication circuit in the direction of a hydraulic fluid reservoir. A valve device arranged downstream of the cooling device and upstream of the lubrication circuit is provided, which valve device is transferable into a first operating state and into a second operating state depending on the operating condition, whereas, in the first operating state of the valve device, a volume flow of hydraulic fluid supplied to the valve device is able to be discharged at least partially in the direction of the hydraulic fluid reservoir, while, in the second operating state of the valve device, a volume flow of hydraulic fluid supplied to the valve device is able to be supplied at least partially to a shifting element of the transmission device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.