Patent ID: 7017840

Claim:
An injection device for injecting fuel, comprising a nozzle needle, arranged in a nozzle body; a micro-bore formed in the nozzle body the nozzle body having an injection hole therein, wherein a tip of the nozzle needle projects into the micro-bore; the tip located in the axial direction of the nozzle needle at the level of the injection hole, the tip having a recess formed therein at a point level with the injection hole in order to ensure a minimum distance between the tip and an uppermost edge point of the injection hole; and the recess configured as a cirumferential groove, wherein the minimum distance is formed by an area lying in a plane arranged perpendicular to the axial direction with the area between the outer periphery of the tip and the uppermost edge points of the injection hole being greater than or equal to approximately 0.200 mm 2 , and having a nozzle needle lift range between 0 and approximately 80 μm.