Hydraulic control system for an automatic transmission
US9982774B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2017 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Mar 16, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/0069
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control system for a motor vehicle transmission includes a pressure regulation subsystem and a manual valve assembly in fluid communication with the pressure regulation subsystem. The manual valve assembly is moveable between at least park, neutral, drive, and reverse positions. A default disable valve assembly is in fluid communication with the manual valve assembly, a default disable solenoid valve assembly, and a default select valve assembly. A one-way valve may be provided to permit hydraulic fluid to flow to a second-priority hydraulic circuit when in a default mode of operation. A combined main regulation and priority valve may be provided to pressurize line pressure as a first priority, pressurize the second-priority hydraulic circuit as a second priority, and to feed excess pressure to a decrease-pressure circuit as a third priority.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.