Hydraulic control system for an automatic transmission having default gears applied through a clutch hydraulic exhaust circuit
US10161508B2 · kind B2 · utility
1Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2016 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Mar 16, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control system for a transmission is provided. The hydraulic control system provides one or more default gears during a default condition when the transmission loses electronic control. The hydraulic control system includes a default enable valve, a default select valve, and a plurality of clutch regulation valves. The default enable valve and the default select valve feed hydraulic fluid through exhaust circuits to a set number of the clutch regulation valves during a default condition in order to provide a default gear ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.