Injection device for an internal combustion engine

An injection device for an internal combustion engine, the injection device comprising:

• a fuel delivery pump and a high-pressure pump connected to one another via a low-pressure fuel line;
• a high-pressure reservoir connected to said high-pressure pump;
• at least one injector connected to said high-pressure reservoir via a high-pressure fuel line;
• at least one fuel return line connected directly to a leakage connection of said at least one injector;
• at least one air bleed valve disposed at a location selected from the group consisting of
• a course of said low-pressure fuel line directly upstream of said high-pressure pump, and
• at a low pressure side in said high-pressure pump;
• said at least one fuel return line issuing into said low-pressure fuel line in between said at least one air bleed valve and said fuel delivery pump;
• said at least one air bleed valve being a Schrader valve or a hydraulic coupling and said at least one air bleed valve including an actuator for automatically opening and/or closing said at least one air bleed valve.