Fuel injector and fuel-injection system

A fuel injector, comprising:

• a nozzle body adapted to be inserted into a recess of a cylinder head,
• a valve housing;
• a plug abutting the valve housing;
• and
• at least one fixation device adapted to fix the nozzle body in position in the recess, the fixation device extending from a connection region between the valve housing and the plug on a spray-discharge side,
• wherein the at least one fixation device includes a reinforcement on an outer periphery, the reinforcement being formed by at least one outwardly projecting element having at least one of (a) an outwardly curving end face and (b) a planar end face.

A fuel-injection system, comprising:

• a cylinder head including at least one recess;
• and
• at least one fuel injector including:
• a nozzle body adapted inserted into the recess of the cylinder head,
• a valve housing;
• a plug abutting the valve housing;
• and
• at least one fixation device adapted to fix the nozzle body in position in the recess, the fixation device extending from a connection region between the valve housing and the plug on a spray-discharge side,
• wherein the at least one fixation device includes a reinforcement on an outer periphery, the reinforcement being formed by at least one outwardly projecting element having at least one of (a) an outwardly curving end face and (b) a planar end face;
• wherein a second recess is provided in the cylinder head to accommodate a fixation element, which is in the form of an elongated hole.