Method and device for the intermittent injection of fuel into the combustion chamber of a combustion engine
US5167370A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1990 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Nov 14, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method and a device for intermittently injecting fuel into a combustion chamber of a combustion engine. Efforts to reduce the emission of pollutants and the noise level of Diesel engines are geared towards a control of the heating process. According to the present invention this is achieved by employing the valve needle of the injection valve as a control member for the fuel supply into the pressure chamber of the valve body, whereby the valve needle is actuated to open and close the valve at a high frequency in short intervals. In conjuction with the high fuel pressure, a good droplet size distribution is realized which leads to a homogeneous fuel-air mixture. Dividing the fuel injection process into short intervals by relatively simple design measures results in an extended heating period which positively influences the NO.sub.x contents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.