Hydraulic control circuit for vehicle power transmission device
US9982775B2 · kind B2 · utility
1Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2015 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Sep 7, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1268
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Ground wires are shared between a drive-side pulley solenoid valve and a driven-side pulley solenoid valve. Therefore, when a disconnection or short circuit occurs in the shared portion, a drive-side pulley and a driven-side pulley show substantially the same behavior. As a result, changes in the speed ratio γcvt of a continuously variable transmission are suppressed and changes in vehicle behavior are also suppressed. Therefore, it is possible to suppress the degradation of drivability during the failure of the solenoid valves involved in power transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.