Patent ID: 8313048

Claim:
A fuel injector for directly injecting fuel into a combustion chamber of an internal combustion engine, comprising: a valve needle situated in a nozzle body and operable by an actuator; a valve seat body having at least one spray hole; and a valve closing body operatively coupled to the valve needle and cooperating with a valve seat face for opening and closing the valve, the valve seat face being formed on the valve seat body; wherein the at least one spray hole has a first cylindrical section with a fuel inlet opening, and a second cylindrical section, situated downstream from the first cylindrical section, having a fuel outlet opening, the first and second cylindrical sections not running coaxially to one another, such that the fuel injector is configured to impart first and second circumferential flows to a fuel stream passing therethrough, the first and second circumferential flows flowing in respective first and second rotational directions along a circumference of the second cylindrical section, the first direction being opposite the second direction, the axes of the first and second cylindrical sections being non-coplanar such that the fuel injector is configured to provide a difference in mass flow between the first circumferential flow and the second circumferential flow.