Plug-in pump for a common-rail system and engine arrangement having an internal combustion engine, having a common-rail system and having a plug-in pump

A plug-in pump for a common-rail system, the plug-in pump comprising:

• a pump housing having a cylinder formed therein,
• a piston guided in the cylinder,
• a fuel inlet, and
• a fuel outlet,
• wherein the pump housing further includes:
• a plug-in section configured to be inserted into an opening in an engine component, and
• a flange that delimits the insertion of the plug-in section into the opening in the engine component,
• at least one flow duct having a flow duct fluid inlet and a flow duct fluid outlet,
• wherein the flow duct fluid inlet is configured for connection to a fluid-discharging line of the internal combustion engine and the fluid outlet is configured for connection to a fluid-receiving line of the internal combustion engine;
• and
• a first fluid connection of the fluid-discharging line in a connecting region on the engine component,
• wherein the fluid inlet is disposed on the flange and aligned to the first fluid connection when the plug-in pump is mounted on the engine component.