An inwardly opening fuel injection nozzle includes a first spring (21) which is coupled by means of a push rod (22) to the valve member (18) of the nozzle. The nozzle includes a second spring (28) positioned betweeen the first spring and the valve member and acting upon a slidable abutment member (29) which is engaged by the valve member (18) after a predetermined movement of the valve member away from a seating. The valve member is lifted against the first sprng by fuel under pressure supplied to an inlet (14) to allow restricted fuel flow through an outlet (16A) and further against the action of both springs as the pressure at the inlet increases to allow unrestricted flow through the outlet.