Patent ID: 9297344
Filing Date: 2016-03-29
CPC Classification: F02M

Claim Text:
1. A fuel injection valve for an internal combustion engine, comprising: an injector body having an injector shaft and a receiving hole for an injector needle, wherein the receiving hole defines: at least one injector tip hole formed in a tip portion of the injector shaft, the at least one injector tip hole extending from the blind injector hole and connecting the injector ring chamber below the valve seat to an outer region, and an injector needle being movable in a longitudinal direction in the receiving hole and having a needle tip comprising: wherein the cone-shaped valve seat has an angle of taper that is smaller than the angle of taper of the cone-shaped needle portion of the injector needle, such that in a closed state of the fuel injection valve the cone-shaped needle portion of the needle tip rests on the cone-shaped valve seat only at a circumferential line of transition between the cone-shaped needle portion and the elongated needle body, thereby defining a contiguous chamber between the cone-shaped needle portion and the cone-shaped valve seat and between the needle pilot and the blind injector hole wall, the contiguous chamber being sealed off from the injector ring chamber in the closed state of the fuel injection valve, and wherein the needle pilot of the needle tip has a needle pilot tip having a cross-sectional shape with respect to the longitudinal axis corresponding to the cross-sectional shape of the blind injector hole with respect to the longitudinal axis to protrude into the blind injector hole reducing a compression volume formed between the valve seat and the at least one injector tip hole extending from the blind injector hole in the closed state of the fuel injection valve.