Hydraulic pressure control apparatus for vehicular automatic transmission and control method for hydraulic frictional engagement device of vehicular automatic transmission
US6893379B2 · kind B2 · utility
6Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2003 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Aug 13, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/52
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
When it has been determined that control for a predetermined upshift has been started while an accelerator pedal was not being depressed, and that a factor that changes an input torque of an automatic transmission has been generated, an engaging pressure of a predetermined hydraulic frictional engagement device is corrected by a correction amount in accordance with the factor that changes the input torque. As a result, undershooting of an engine speed, as well as shift shock which results from that undershooting, is able to be preferably suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.