Dual sump transmission hydraulic control system
US10941856B2 · kind B2 · utility
0Cited by
6References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2014 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Jul 28, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86879
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control system includes a primary sump and an auxiliary sump. When the transmission fluid is warm, fluid remains in the auxiliary sump reducing the volume of oil in circulation throughout the transmission to reduce parasitic losses. An oil control valve is designed to block flow of oil from the auxiliary sump to the primary sump when the fluid is warm and to allow flow when the fluid is cold. The oil control valve also responds to transmission line pressure. At moderate temperatures, fluid is held in the auxiliary sump when the engine is running but drains back to the primary sump when the engine is off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.