Ignition combustion pre-chamber for internal combustion engines with constant stoichiometric air-fuel mixture at ignition
US5081969A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Feb 14, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An ignition combustion pre-chamber for igniting an air-fuel mixture in an internal combustion engine which operates in conjunction with an engine management system to maintain an ideal stoichiometric air-fuel ratio in the pre-chamber throughout the complete operating range of the engine. A one-way check valve admits a separate air-fuel mixture into the pre-chamber which, after mixing with the portion of the air-fuel mixture of the main combustion chamber which necessarily enters the pre-chamber during the compression stroke of the engine, results in an ideal stoichiometric mixture receptive to quick ignition and faster flame front propagation throughout the main combustion chamber. In a second embodiment, the pre-chamber is separated from the main combustion chamber by a second one-way check valve which prevents mixing of the separate air-fuel mixtures during the compression stroke, allowing a constant stoichiometric air-fuel ratio to be introduced into the pre-chamber and ignited. Alternate gaseous fuels can also be used with the pre-chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.