Fuel injector with remotely operated actuator, optimized system pressure supply has coupling chamber connected to high pressure side via shunt line, system pressure maintaining unit

摘要

The device has a hydraulic converter with an actuator for controlling a switching valve for operating a control chamber and a hydraulic coupling chamber connected to a low pressure side via a leakage oil line and subjected to fuel under high pressure from a high pressure side, to which the coupling chamber is connected via a shunt line branching off from the high pressure side. A system pressure maintaining unit is connected after the branch point. The device has a hydraulic converter (6) with an associated actuator for controlling a switching valve (8) for operating a control chamber whose pressure can be relieved and a hydraulic coupling chamber (7) connected to a low pressure side (4) via a leakage oil line (23) and subjected to fuel under high pressure from a high pressure side (1). The coupling chamber is connected to the high pressure side via a shunt line (22) branching off from the high pressure side and a system pressure maintaining unit (3) is connected after the branching point.