Hydraulic control apparatus and hydraulic control method for automatic transmission
US7740557B2 · kind B2 · utility
4Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2008 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Mar 13, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control apparatus of an automatic transmission estimates the possibility of there being a demand for a shift into a gear lower than the current gear during a power-off downshift operation. If there is a possibility that there will be a demand for a shift into the next gear during the shift, the hydraulic control apparatus starts an operation for supplying an apply preparation hydraulic pressure in preparation for the shift into that next gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.