Patent ID: 9556842
Date: 2017-01-31
CPC Classifications: B05B,F02M

Claim:
1. A fuel injection valve comprising: a needle valve with a seat surface on a distal end side; a nozzle body with a seat section on which the seat surface rests and with an injection opening disposed downstream of the seat section; and a swirl flow generating section with a spiral groove for causing fuel injected via the injection opening to swirl, wherein the seat surface includes a first contact point, the first contact point contacting a second contact point included in the seat section during valve closing, a line segment drawn by connecting the first contact point and the second contact point when the valve is fully open intersects a virtual straight line in an intersection, the virtual straight line passing a bottom of a first groove section and a bottom of a second groove section, the bottom of the first groove section that appears the most downstream side of a cross section of the swirl flow generating portion in a plane including a central axis of the needle valve, and the bottom of a second groove section that appears one step upstream side of the first groove section, and the intersection is located at a place between the first contact point and the second contact point when the valve is fully open.