Common rail fuel injection system
US5230613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1992 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Jan 16, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0225
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A common rail fuel system, primarily including a high-pressure fuel pump, a rail, fuel injection nozzles, and an electronic control system, is disclosed. A substantially constant fuel pressure is maintained within the rail by the fuel pump under the direction of the electronic control system. The pressurized fuel is communicated to the fuel injection nozzles, which are also under the direction of the electronic control system, thereby providing fuel at injection pressure immediately upon the actuation of the fuel injection nozzles by the electronic control system. The pump incorporates leakage fuel during each stroke without the necessity of rerouting the leakage fuel through a primary supply. This reduces the total amount of fuel pumped and improves metering accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.