CONTROL VALVE FOR A FUEL INJECTOR

The invention relates to a control valve for a fuel injector in a fuel injection system, in particular in a common-rail injection system, comprising a reciprocally movable valve closing element (1) for opening and closing a drain channel (3) formed in a valve piece (2), wherein the valve closing element (1) cooperates with a valve seat (4) bounding the drain channel (3), furthermore comprising a pin (5) for guiding the valve closing element (1), wherein the pin (5) is at least partially accommodated in a bore (7) passing through the valve closing element (1) while forming a guide gap (6). According to the invention, the pin (5) has an outer contour (8) which cooperates with an inner contour (9) bounding the drain channel (3) of the valve piece (2) or with an inner contour (10) bounding the bore (7) of the valve closing element (1) to form a throttle point (11) located outside the guide gap (6).