Variable compression ratio mechanism for reciprocating internal combustion engine
US6684828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Jul 31, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a variable compression ratio mechanism for an internal combustion engine employing an upper link, a lower link, and a control link, the lower link includes a crankpin bearing portion into which a crankpin is fitted, a first connecting-pin bearing portion into which a first connecting pin for the upper link is fitted, and a second connecting-pin bearing portion into which a second connecting pin for the control link is fitted. A central connecting portion is provided to connect an axial central portion of at least one of the first and second connecting-pin bearing portions to an axial central portion of the crankpin bearing portion. The central connecting portion has an axial length L1 shorter than each of an axial length L2 of the crankpin bearing portion, an axial length L3 of the first connecting-pin bearing portion, and an axial length L4 of the second connecting-pin bearing portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.