Patent ID: 6840465
Filing Date: 2005-01-11
Classification: F02M,Y10S

Abstract:
1. A manufacturing method of a fuel injection valve that is equipped, on part of the circumference of an injection hole outlet opening, with a restriction wall which restricts the movement of fuel so that the fuel, injected from the injection hole and given a circling force, attains a component along the circling direction; wherein of the two ends of the restriction wall on the circumference, there is provided a wall that extends, with its height along the direction of the injection hole center axis, from one end located in the upstream of the circling direction of the fuel and parts, while extending from the end, from the edge of the injection hole outlet opening; when, at least, either the height of the wall or the angle between a direction along which the wall extends from the end perpendicularly to the injection hole center axis and a line which connects the two ends on the circumference of the restriction wall is changed, at least either one of the two ends is changed of its position on the circumference, and the fuel injection valve generates a spray profile that contains a concentrated spray portion and a thin spray portion, when viewed along the cross section perpendicular to the injection hole center axis of the injected fuel, and the positional relation between the concentrated spray area and the thin spray area is changed by varying the height or angle of the wall, and position of the one end.