Internal combustion engine employing variable compression ratio mechanism
US7681538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2008 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Mar 18, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/048
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine which varies a compression ratio by changing a top dead center position of a piston, including an engine block, the piston disposed in the engine block, a crank shaft supported by the engine block, and a plurality of links connecting the piston and the crank shaft. A first control shaft and a second control shaft respectively are supported by the engine block, each of which has a main shaft portion rotatably supported by the engine block and an eccentric portion eccentric to the main shaft portion, the eccentric portions of the first control shaft and the second control shaft deviating from axes of the respective main shaft portions in mutually different directions when viewed from an axial direction. A plurality of control links connect any one of the plurality of links connecting the piston and the crank shaft, and the first control shaft and the second control shaft. A driving unit is provided at least one of the first control shaft and the second control shaft, that rotates the control shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.