Hydraulic control system for an automatic transmission having a neutral locked turbine mode
US10012311B2 · kind B2 · utility
1Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2016 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Jan 30, 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 transmission includes a reverse, a low gear ratio, and a high gear ratio during default conditions where the transmission loses electronic control. The hydraulic control system also provides neutral locked turbine capability that engages clutches to lock the transmission input shaft in order to generate heat. The hydraulic control system includes a manual valve, a default enable valve, a default select valve, and a plurality of clutch regulation valves. The neutral locked turbine capability may be engaged when the manual valve is in either a park or neutral position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.