Hydraulic control device for automatic transmission
US9964206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2014 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jul 19, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2082
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control device for an automatic transmission, wherein when the first switching valve is switched to the first state while the second switching valve is in the third state, the reverse range pressure applied from the reverse range pressure input port of the second switching valve can be supplied from the first output port to the hydraulic servo for the first friction engagement element via the fourth output port of the second switching valve and the first input port of the first switching valve, and when a shift range is shifted from a neutral range to a reverse range, the second switching valve is in the fourth state, and the first switching valve is switched from the first state to the second state, so that the reverse range pressure applied to the reverse range pressure input port is cut off by the second switching valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.