Oil supply system with vacuum pump for transmission of drive system
US11959542B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2022 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Jul 25, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H57/0409
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil supply system includes a first oil receptacle collecting oil from a transmission and a second oil receptacle collecting oil from the rest of a drive system using gravity. Oil supply pump(s) supply oil from the oil receptacle(s) to the different consumers. A vacuum pump generates a negative pressure in the first oil receptacle and in the transmission casing connected to the first oil receptacle. A gas check valve prevents gas from flowing between the oil receptacles when a pressure differential is applied to the oil receptacles by the vacuum pump. An oil check valve prevents oil from flowing between the oil receptacles when the pressure differential is applied. An oil regulating valve may control the oil flow between the first and second oil receptacles. The oil supply system provides a simpler configuration without scavenging pump(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.