Hydraulic control device for automatic transmission
US10174822B2 · kind B2 · utility
0Cited by
3References
20Claims
0Family size
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Inventors
Key dates
| Filing date | Jul 6, 2015 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Mar 10, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/126
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control device for an automatic transmission where the spool is locked at the first position and the switching pressure can regulate the belt holding force of the primary pulley or the secondary pulley without switching a position of the spool when the engagement pressure is supplied to the second working oil chamber, and the spool is not locked at the first position and the switching pressure can switch the spool to the second position against the urging member when the engagement pressure is not supplied to the second working oil chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.