Transmission park control system
US10344858B2 · kind B2 · utility
0Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2017 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Mar 3, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A park valve includes a slidable end-cap. Under normal circumstances, the end-cap is held in a nominal position by a spring, such as a Belleville spring. The park valve performs a multi-plexing function in which an out-of-park circuit is connected to line pressure when the valve is in an out-of-park position and is vented when the valve is in a park position. In an intermediate position, a hydraulic lock condition may potentially occur. When engaging park, the hydraulic lock condition is prevented by the slidable end-cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.