Fuel injection system for an internal combustion engine
US6752130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Dec 19, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system having a prefeed pump, through which fuel from a fuel supply container is pumped to a high-pressure pump, and by means of the high-pressure pump, fuel is pumped into a reservoir. Communicating with the reservoir is at least one injector, through which fuel is injected to the engine. A fuel filter is disposed between the prefeed pump and the high-pressure pump. A return line for uninjected fuel leads back from at least one injector into a region upstream of the high-pressure pump. A valve is provided, by which the return line, in a first switching position, at a low fuel temperature, leads to upstream of the fuel filter, between it and the prefeed pump, and by which the return line, in a second switching position, at a high fuel temperature, leads to downstream of the fuel filter, between it and the high-pressure pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.