Control device for an automatic transmission
US8768590B2 · kind B2 · utility
4Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2008 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Oct 30, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/022
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission ECU 12 determines whether or not the conditions for executing a neutral control operation are satisfied (step S11), and measures hydraulic oil temperature if it determines that the execution conditions are satisfied (step S12). Then, the transmission ECU 12 sets a target speed ratio for a torque converter 3 corresponding to the measured hydraulic oil temperature (step S13), and performs a neutral control operation to bring the speed ratio of the torque converter 3 equal to the target speed ratio (step S14).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.