Robert Boschgmbh

Andreas Gruenberger

Hans-Christoph Magel

Holger Rapp

Wolfgang Stoecklein

Matthias Horn

Udo Schaich

Marco Beier

Thomas Pauer

Dieter Junger

Markus Rueckle

Martin Kiontke

Jochen Wessner

Andreas Rettich

Wilhelm Christ

Andreas Rau

Andreas Koeninger

Thomas Schwarz

Armin Richter

Stephan Wursthorn

Stephan Amelang

Henning Kreschel

Lorenz Zerle

Marco Stieber

Alexander Villmann

Sven Siauw

Philipp Wachter

A conveying unit () for a fuel cell system () for conveying and/or recirculating a gaseous medium, in particular hydrogen, comprising a jet pump () driven by a driving jet of a pressurized gaseous medium, and comprising a metering valve () with a nozzle (), wherein: the conveying unit () is designed as a combined valve jet pump assembly (); the gaseous medium is fed to the jet pump () by means of the metering valve (); the jet pump () has a main body (); and the jet pump () is connected to an anode inlet () of a fuel cell (). According to the invention, a deflection and/or change of direction of the gaseous medium which flows in a flow direction VII from the jet pump () to the anode input () of the fuel cell () occurs exclusively in the deflection region (), said the jet pump () having a separate closure cover () connected to the main body (), and the deflection region () and/or the deflection- or guiding geometry of the deflection region for the gaseous medium () is formed exclusively in the component of the closing cover ().

Conveying unit for a fuel cell system for conveying and/or controlling a gaseous medium

The invention relates to a metering valve () for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (), wherein an interior space () is formed in the valve housing (). A reciprocating closing element () is arranged in the interior space (), which interacts with a valve seat () for opening or closing at least one passage channel (). Furthermore, the metering valve () comprises a nozzle (), the at least one passage channel () being formed in the nozzle () and the passage channel () having a circular-cylindrical portion.

Metering valve and jet pump unit for controlling a gaseous medium

The invention relates to a proportional valve () for controlling a gaseous medium, in particular hydrogen, comprising a movable closure element () and a first spring () arranged on the closure element (), the first spring () being configured in order to exert a first spring force on the closure element () in a closing direction, and an actuator (), the actuator () being configured in order to provide an adjustable force in the opposite direction to the first spring force, the closure element () being configured in order to close and to open a through opening () by the movement, the proportional valve () comprising a closure element () which is arranged at an end of the closure element () remote from the first spring (), and a second spring (), the second spring () being arranged on the closure element () and the second spring () being configured in order to exert a second spring force on the closure element (), the second spring force counteracting the first spring force.

Proportional valve for controlling a gaseous medium and fuel cell arrangement

The invention relates to a proportional valve () for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (), in which a closing element () arranged therein interacts with a valve seat () in order to open and close at least one passage opening (). Furthermore, an armature device (), which is operatively connected to the closing element (), and an electromagnet () are provided, by means of which electromagnet a magnetic force can be produced on the armature device () and the armature device () can move reciprocatingly along a longitudinal axis () of the proportional valve (). Moreover, the electromagnet () comprises an inner pole (), an outer pole () and a solenoid coil () and the armature device () composes an armature (). The valve housing () and the inner pole () are magnetically connected to each other by means of a magnetic choke point (). The magnetic choke point () is formed in an axial region of extent of the armature (). Furthermore, the inner pole () has a cavity () having a cavity edge (). The armature () plunges in said cavity () during the reciprocating motion of said armature. In a closed position of the proportional valve (), an end face () of the armature () lies at the same height as the cavity edge () of the cavity () with respect to the longitudinal axis (), the cavity edge () forming the end of the magnetic choke point ().

Proportional valve for controlling a gaseous medium

The invention relates to a fuel injection valve comprising a housing () in which pressure is applied to a nozzle needle (), in a control chamber (), at least indirectly with a closing force in the direction of a valve seat (). The pressure in the control chamber () can be adjusted using a control valve () as said control chamber () is able to be connected to a low pressure chamber () via an outlet restrictor () and be filled with fuel at high pressure via an inlet restrictor (). A longitudinally-displaceable control piston () is arranged in the control chamber () and divides said chamber () into a first control sub-chamber and a second control sub-chamber (), the first control sub-chamber () being able to be connected to the low pressure chamber () by means of said outlet restrictor (). A sealing surface () is formed on the control piston () and interacts with a sealing seat () in the control chamber () such that the inlet restrictor () is hydraulically disconnected from the second control sub-chamber () when the sealing surface () comes to rest against the sealing seat (). Said first control sub-chamber () and second control sub-chamber () are constantly hydraulically interconnected by means of a restrictor connection ().

Fuel injection valve for internal combustion engines

A fuel injection valve includes a nozzle needle interacting with a valve seat by longitudinal movements thereof, thus opening/closing an injection opening. The nozzle needle undergoes a locking force toward the valve seat pressure in a control space. A control valve adjusts pressure in the control space. The control valve has a control valve space connected to the control space, in which a control valve member is disposed longitudinally movably, and opens and closes a connection of the control valve space to a leakage oil space by longitudinal movement. The control valve member is surrounded by pressure in the control valve space and configured such that no or very little resulting hydraulic force acts upon the control valve member in the movement direction by the pressure in the control space, if the control valve member closes the connection of the control valve space to the leakage oil space.

Growing community of inventors

Spraitbach, Germany

Andreas Gruenberger