Clutch hydraulic pressure control circuit
US10047805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2016 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Nov 25, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/0078
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A clutch hydraulic pressure control circuit includes: a shift valve for switching the destination to feed hydraulic pressure to a first hydraulic clutch or a second hydraulic clutch; and first and second shift solenoid valves operating synchronously to actuate the shift valve. The two shift solenoid valves include a holding valve for keeping hydraulic pressure fed to the shift valve even when hydraulic pressure supply through one of the first and second shift solenoid valves happens to be shut off while hydraulic pressure is fed through the first and second shift solenoid valves to paths between the shift valve and the shift solenoid valves, or when hydraulic pressure supply through one of the first and second shift solenoid valves happens to occur while no hydraulic pressure is fed through the shift solenoid valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.