Hydraulic control device of automatic transmission
US9765882B2 · kind B2 · utility
1Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2014 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Dec 25, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention provides a control unit. When the control unit performs shifting from a state in which a first shift speed is established by supplying engagement pressures to both hydraulic oil chambers and engaging a predetermined engagement element to a second shift speed by switching engagement and disengagement states of engagement elements other than the predetermined engagement element (Step S1), the control unit reduces the supply of the engagement pressure to one of the two hydraulic oil chambers to a level lower than that in the state in which the first shift speed is established (Step S3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.