Multiple ratio automatic transmission with solenoid operated valves for effecting pressure buildup
US5612874A · kind A · utility
27Cited by
16References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | May 4, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2342/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for a multiple ratio transmission including a hydrokinetic torque converter with a pressure actuated friction bypass clutch, pressure actuated clutches and brakes controlling ratio changes in forward drive and for effecting reverse drive, a solenoid operated pressure control that develops an optimum clutch and brake pressure for smooth engagement and for increased torque capacity during start-up, and separate solenoid regulator valves for ratio shift valve control and for bypass clutch pressure control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.