Robert Boschgmbh

Franz Thoemmes

Ferdinand Reiter

Laurent Jeannel

Ian C Faye

Helmut G Schwegler

Dieter Maier

Hartmut Albrodt

Frank Miller

Markus Gesk

Ansgar Seitz

Dieter Etzel

Kerstin Koch

Martin Stahl

Tilo Starkert

Jürgen Lander

A spray orifice disk for a valve for a flowing fluid and, in particular, for a metering or injection valve for an internal combustion engine, including a disk body and a spray orifice set-up, which is formed in the disk body and is configured with at least one spray orifice for dispensing supplied fluid, and including at least one channel for supplying the fluid to the spray orifice. The spray orifice, the channel and/or the transition between the channel and the spray orifice being configured to form a swirl geometry of the spray orifice disk in such a manner, that during operation, due to interaction of one or more jets of the fluid emerging from the spray orifice in turbulence atomization, an oval cross-sectional pattern of the spray is formed, in particular, in the form of a flat spray.

Spray orifice disk and valve

The invention relates to an injector assembly for metering a fluid, in particular a reductant, into an exhaust line () of an internal combustion engine, comprising an injector (), a housing () which surrounds the injector (), a first opening () which is provided on the housing () in order to allow access for a fluid connection () in order to supply the fluid to the injector (), a second opening () which is provided on the housing (), and an electric connection assembly () which is arranged in the housing () and which is led from an electric connection () of the injector to the second opening (). The electric connection assembly () comprises a line portion () and a plug socket (), and the plug socket () is arranged in the housing () in a sealed manner on the second opening ().

Injector assembly for metering a fluid into an exhaust line

The invention relates to a device for metering fluid, particularly for the metered injecting of a reduction agent into the exhaust tract of an internal combustion engine, which has an electrically controllable metering valve () having a valve housing (), having an inlet opening and a metering opening () for the fluid, and a cooling module () to which a coolant is applied for cooling the metering valve. In order to achieve a permanent fording ability of the device, the metering valve () is hermetically sealed in the cooling module () and only the inlet opening and the metering opening () of the valve housing () are exposed.

Device for metering fluid

A metering valve or an injector includes: a valve-seat member which closes a valve chamber and has a central valve opening, and a spray orifice disk downstream from the valve-seat member in the flow direction of the fluid, which has at least one spray orifice. The spray orifice disk has a swirl chamber concentric with the spray orifice and at least one swirl duct leading from the swirl chamber to beneath the valve opening, and the swirl chamber and swirl duct are integrally formed as recesses into the disk surface of the spray orifice disk facing the valve body. The swirl duct has a duct cross section and the spray orifice has an orifice cross section such that the ratio of the duct cross section to the orifice cross section is equal to or greater than 1.5.

Valve for a flowing fluid

An injection valve for fuel-injection systems has a valve-seat support, a valve needle, a solenoid and a connection piece having a filter, to convey the fuel. Valve opening and valve seat are formed on the one-piece valve-seat support itself, which additionally guides the valve needle so as to be axially displaceable; solenoid coil and connector plug are combined in a separate, plastic-extrusion-coated coil part, the magnetic cup is placed over the coil part, and the connection piece is formed as separate plastic-injection-molded part having an integrated filter. Joining and sealing points between the connection piece on the one side and the coil part, magnetic cup and/or valve-seat support on the other side are bonded.

Injection valve

An atomizer nozzle () for fuels, in particular for feeding them into a chemical reformer for obtaining hydrogen, has a nozzle body () containing spray-discharge orifices () that discharge into a metering space, and has at least one metering aperture (). The spray-discharge orifices () are situated at elevation levels () so as to have a radial directional component with respect to a center line () of the nozzle body (), each elevation step having at least one spray-discharge orifice (), and the spray-discharge orifices () of at least one elevation level () being connected to at least one channel () of a nozzle-body insert () that has at least one flow-through opening ().

Growing community of inventors

Bietigheim-Bissingen, Germany

Franz Thoemmes