Patent ID: 6857417

Claim:
A fuel injection nozzle comprising: a nozzle body that includes a fuel injection hole and a valve seat, wherein the valve seat is located on an inlet side of the fuel injection hole; and a nozzle needle that includes an engaging portion, which is seatable against the valve seat to stop fuel injection through the injection hole, wherein: the nozzle needle has a coating layer in an outer wall of the nozzle needle; the coating layer is made of a lipophobic material; and the coating layer is arranged to satisfy the following relationship: T ≦0.01 ×H, where “T” is a thickness of the coating layer, and “H” is a distance between the nozzle body and the nozzle needle, which is measured at a narrowest cross sectional point in a fuel passage defined between the nozzle body and the nozzle needle on a downstream side of an upstream end of the engaging portion when an amount of lift of the nozzle needle is maximized.