Valve timing controller
US8851032B2 · kind B2 · utility
0Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jan 19, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2301/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable-camshaft-timing mechanism is provided with a conically spiral spring valve as a check valve. When the conically spiral spring valve is opened, a plurality of flow passage clearances are formed between adjacent windings of the check valve, whereby a pressure loss of the working fluid can be reduced when passing through the check valve. When a reverse flow is generated, the check valve receives the reverse flow in its axial direction. Thus, the reverse flow of the working fluid can be utilized as a thrust force in a close direction of the check valve. A valve closing responsiveness of the check valve can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.