Internal combustion engine
US7387103B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 7, 2006 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Nov 7, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A high thermal efficiency lean-burn spark- ignition two or four stroke engine operable unthrottled suitable for vehicles using gasoline. It uses an indirect combustion chamber and a transfer orifice with or without shaping of the combustion chamber to produce a jet of air moving in helical swirl motion around the chamber during the compression stroke. Fuel is injected into the chamber aimed into the air jet to assist rapid vaporization. The position and orientation of the fuel injector ensures that fuel arrives near the spark plug even under idling conditions and the helical swirl flow ensures the stratification of the ignitable mixture formed near the plug. The compression ratio of the engine can also be variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.