Robert Boschgmbh

Joerg Schlerfer

Martin Maier

Joerg Heyse

Detlef Nowak

Guenter Dantes

Thomas Sebastian

Jens Pohlmann

A fuel injector, in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, includes a valve-closure member which forms a sealing seat together with a valve-seat surface which is formed on a valve-seat member, and several injection orifices, each of which is connected with at least one spiral groove so that an outer edge of the swirl grooves coincides in part with a circumferential edge of the injection orifices. The swirl grooves extend generally perpendicular to a center line of the injection orifice associated with them.

Fuel injector

A fuel injector for fuel injection systems of internal combustion engines has a valve needle ( ) and, mechanically linked thereto, a valve closing body ( ), which cooperates with a valve seat surface ( ) disposed in a valve seat body ( ) to form a sealing seat, and has a plurality of recesses ( ), which are introduced in the valve seat body ( ) downstream from the sealing seat. Situated downstream on the valve seat body ( ) is a flow-through screen ( ) in which, for each recess ( ), at least one discharge orifice ( ) is introduced, whose cross-section is smaller than that of the particular recess ( ) and which is positioned such that its inlet cross-section is situated fully within the outlet cross-section of the particular recess ( ).

Fuel injection valve

Growing community of inventors

Bietigheim-Bissingen, Germany

Joerg Schlerfer