| 摘要 |
The invention relates to a fuel injector 8, a method for injection of fuel, and a combustion engine with a fuel injector 8. The fuel injector 8 comprises a connection 22 for pressurised fuel 12, an accumulator space 26 for fuel 12, and a nozzle needle 28 which intermittently blocks apertures 30,32 to a combustion chamber 18, while the injector 8 further comprises a piston 46 which is connected to the high-pressure space 26 via a duct 58 and is movable within a space 47 and which, when moved directly or indirectly under the influence of a control unit 67 before the beginning of an injection period, can assume a position such that pressurised fuel is supplied to the space 47, whereby the fuel column 73 from the connection 22 for pressurised fuel 12 is set in motion before injection takes place. The dynamic energy, i.e. the mass moment of inertia, in the fuel flow can thereby be used for the injection into the combustion chamber, making it possible to achieve a high injection pressure throughout the injection period. |
