Reciprocating engine with a variable compression ratio mechanism
US6920847B2 · kind B2 · utility
6Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2004 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Jan 14, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A reciprocating engine with a variable compression ratio mechanism is disclosed. A lubrication system of the engine is improved by controlling an oil pressure according to a compression ratio setting. The lubrication system includes various combinations of control valves and oil passages. The oil relief passage is opened at a high compression ratio setting applied to a low engine load range and is otherwise closed at a low compression ratio setting applied to a high engine load range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.