Variable compression ratio control system for an internal combustion engine
US6450136B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2001 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | May 14, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine has a mechanism to control the compression ratio of the combustion chamber. The mechanism includes an eccentric journal bearing supporting each piston rod on the crankshaft of the engine. The journal bearing has a gear member secured thereto that meshes with an inner toothed profile of a ring gear which has an outer toothed profile that meshes with an engine-driven gear. The speed of the engine-driven gear is controllable through a differential gear mechanism to adjust the relative position of the eccentricity of the journal bearing relative to the crank throw on which it is supported. This will change the compression ratio of the combustion chamber of the engine. The mechanism, with a modification, can also be employed to control the maximum compression pressure or the maximum combustion pressure in the combustion chambers of engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.