Patent ID: 6938840

Claim:
A fuel injector for a fuel injection system of an internal combustion engine, comprising: an energizable actuating element; a valve needle that is axially movable along a longitudinal axis of a valve; a fixed valve seat; a valve seat element including an orifice following downstream from the fixed valve seat; a valve closing section arranged on a downstream end of the valve needle and for working together with the fixed valve seat for opening and closing the valve, wherein: the fixed valve seat is designed on the valve seat element; a flattened face running perpendicular to the longitudinal axis of the valve and being arranged on the downstream end of the valve closing section downstream from the fixed valve seat; a guide element including alternating recesses and tooth-shaped projecting areas along a periphery of the guide element, the recesses configured to channel fuel through the guide element; and a swirl-producing element arranged upstream from the fixed valve seat and downstream of the guide element, wherein: the flattened face includes a diameter d that is greater than a diameter D of an outlet orifice, and an entry plane of the outlet orifice is arranged such that the entry plane is completely covered by a projection of the flattened face into the entry plane in a direction perpendicular to the flattened face.