Dual fuel injector, internal combustion engine with such a binary fuel injector, and method of operating such an internal combustion engine

摘要

A dual-fuel injector (3) for an internal combustion engine (1), comprising - a first injector (7) for injecting a first fuel, and - at least one second injector (9.1, 9.2) for injecting a second fuel, the second fuel being from the the first fuel is different, wherein the at least one second injection device (9.1, 9.2) - with a view to a longitudinal axis (A) of the binary fuel injector (3) - at a greater radial distance from the longitudinal axis (A) is arranged as the first injection device (7), and having - a first port for supplying the first fuel and a second port for supplying the second fuel, wherein - the first port (11) with the first injection means (7) for supplying the gaseous first fuel, and the second Connection (13) with the second injection means (9.1, 9.2) for supplying the liquid, second fuel fluidly connected characterized in that - a plurality of second injection devices (9.1, 9.2) is arranged around the first injection device (7), and / or that - each injection device (7, 9.1, 9.2) has an axially stroke-controllable nozzle needle (15, 23.1 , 23.2), a sealing seat (17, 25.1, 25.2), and a blind hole (19, 27.1, 27.2) downstream of the sealing seat (17, 25.1, 25.2), wherein the blind hole (19, 27.1, 27.2) with at least one injection hole (21, 29.1, 29.2) is fluidly connected.