| 摘要 |
The invention relates to a dual-fuel fuel injector (1), having: – a first nozzle needle (5), which can be controlled in terms of axial stroke, for the discharge of liquid fuel via a first nozzle arrangement (21) of the dual-fuel fuel injector (1); – a multiplicity of second nozzle needles (45), which are arranged around the first nozzle needle (5) and which can be controlled in terms of axial stroke, for the discharge of gaseous fuel via a second nozzle arrangement (47) of the dual-fuel fuel injector (1); – wherein, for each of the second nozzle needles (45), for the control of the stroke thereof, a respective control chamber (59) which can be charged with and relieved of pressure by way of a control fluid is provided in the injector (1); wherein – the dual-fuel fuel injector (1) furthermore has an annular duct (65) which can be charged with and relieved of pressure by way of the control fluid; – the dual-fuel fuel injector (1) is designed such that, for the control of the stroke of the second nozzle needles (45), the control chambers (59) for the second nozzle needles (45) are charged with and relieved of pressure by way of the control fluid proceeding from the annular duct (65). |
