Robert Boschgmbh

Michael Leukart

Wilhelm Christ

Gerhard Suenderhauf

Ulrich Lessing

Katja Grothe

Fabian Wolf

Ferdinand Nicolai

Christiane Schiedt

Anja Haug

Uli Herz

Beate Grota

The invention relates to a fuel injector (), comprising a nozzle body () in which a blind hole () is formed, wherein at least one injection opening () leads off same, comprising a nozzle needle (to) that is reciprocatingly movable along a longitudinal axis (), wherein the nozzle needle (-) has a valve seat () which forms a sealing seat () with a seating surface () in the nozzle body () in a lowered position of the nozzle needle (-), and comprising at least one borehole (-) in the nozzle needle (-), wherein at least some portions of a borehole inlet () of the at least one borehole (-) are located in the region of the seating surface () when the sealing seat () is formed, and a borehole outlet () of the at least one borehole (-) is located below the valve seat () of the nozzle needle (-) in the direction of the longitudinal axis ().

Fuel injector

The invention relates to a fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine, having a nozzle needle () which is guided, such that it can perform a stroke movement, in a central bore () of a nozzle body () in order to open up or close off at least one injection opening (), wherein the nozzle needle () interacts, by means of an encircling sealing region () formed on the combustion-chamber-side end thereof, with a sealing seat () that runs conically and is formed on the combustion-chamber-side end of the nozzle body (). According to the invention, the sealing seat () that runs conically has an opening angle (&#x3b1;) of between 30&#xb0; and 50&#xb0;, preferably of between 40&#xb0; and 50&#xb0;.

Fuel injection valve

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Stuttgart, Germany

Michael Leukart