Patent ID: 9441590
Filing Date: 2016-09-13
CPC Classification: F02M

Claim Text:
1. A fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine, the valve comprising: a nozzle needle configured to perform a stroke motion in a central bore of a nozzle body in order to open or close at least one injection opening ( a sealing region encircling a portion of the nozzle needle, wherein the nozzle needle interacts with a conically extending sealing seat formed on the nozzle body, wherein the conically extending sealing seat has an opening angle (α wherein the nozzle body comprises a guiding region as part of a central bore, the guiding region configured to facilitate axial alignment of the nozzle needle, and wherein the guiding region defines a first portion with a first diameter and a second portion with a second diameter greater than the first diameter, the second portion formed immediately adjacent to the conically extending sealing seat, wherein the guiding region length is no more than 40% of the total length of the nozzle body defined from an end adjacent the combustion chamber, and wherein the nozzle needle has a diameter that is complimentary to the first diameter of the guiding region.