Abstract: A conveying unit (1) for a fuel cell system (31) for conveying and/or recirculating a gaseous medium, in particular hydrogen, comprising a jet pump (4) driven by a driving jet of a pressurized gaseous medium, and comprising a metering valve (6) with a nozzle (12), wherein: the conveying unit (1) is designed as a combined valve jet pump assembly (2); the gaseous medium is fed to the jet pump (4) by means of the metering valve (6); the jet pump (4) has a main body (8); and the jet pump (4) is connected to an anode inlet (3) of a fuel cell (29).

Abstract: The invention relates to a jet pump unit (46) for controlling a gaseous medium, in particular hydrogen, comprising a nozzle (1) and a mixing tube unit (30), said mixing tube unit (30) having a longitudinal axis (48) and the nozzle (1) a longitudinal axis (18). The longitudinal axis (48) of the mixing tube unit (48) and the longitudinal axis (18) of the nozzle (1) include an angle (?) with each other.

Abstract: The invention relates to a metering valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (2), wherein an interior space (3) is formed in the valve housing (2). A reciprocating closing element (10) is arranged in the interior space (3), which interacts with a valve seat (37) for opening or closing at least one passage channel (25). Furthermore, the metering valve (1) comprises a nozzle (11), the at least one passage channel (25) being formed in the nozzle (11) and the passage channel (25) having a circular-cylindrical portion.

Abstract: A jet pump unit (46) includes a pump housing (49), a metering valve (1) with a valve housing (2), a mixer tube area (52), an intake channel (43) and a runoff area (45). A through-hole (2) that forms a through-opening (80) is designed in said pump housing (49). The metering valve (1) is received in the through-opening (80) and a first step (200) and a second step (202) are formed in said through-opening (80), radially with respect to a longitudinal axis (40) of the jet pump unit (46), for the purpose of radially centering and guiding the metering valve (1) in said pump housing (49).

Abstract: The invention relates to a method for deactivating a fuel cell system (10) comprising a jet pump (28) for conveying an anode-side gas flow in a recirculation path (26), wherein the jet pump (28) comprises a metering valve (36) for metering H2. While the fuel cell system (10) is cooling, a flow passes through a drive nozzle (46) at least once in order to discharge condensed water. The t invention additionally relates to a jet pump (28) comprising a metering valve (36) and to the use of the method in order to deactivate a fuel cell system (10).

Abstract: A conveying device for a fuel cell system for conveying and/or recirculating a gaseous medium, in particular hydrogen, includes a recirculation fan, a jet pump that is driven by a motive stream of a gaseous medium that is under pressure, and a metering valve. The gaseous medium is supplied to the jet pump by the metering valve. The conveying device further includes an inlet fluidically connected to an anode outlet of the fuel cell and an outlet fluidically connected to an anode inlet of the fuel cell. The jet pump and the metering valve form a combined valve/jet-pump assembly. The components of the conveying device are positioned on a planar carrier element such that flow lines between and/or within the components extend only parallel to the planar carrier element. The planar carrier element is arranged between the fuel cell and the conveying device.

Abstract: The invention relates to a jet pump unit (46) for controlling a gaseous medium, in particular hydrogen, comprising a nozzle (1) and a mixing tube unit (30), said mixing tube unit (30) having a longitudinal axis (48) and the nozzle (1) a longitudinal axis (18). The longitudinal axis (48) of the mixing tube unit (48) and the longitudinal axis (18) of the nozzle (1) include an angle (?) with each other.

Abstract: The invention relates to a proportional valve (100) for controlling a gaseous medium, in particular hydrogen, comprising a movable closure element (301) and a first spring (302) arranged on the closure element (301), the first spring (302) being configured in order to exert a first spring force on the closure element (301) in a closing direction, and an actuator (200), the actuator (200) being configured in order to provide an adjustable force in the opposite direction to the first spring force, the closure element (301) being configured in order to close and to open a through opening (102) by the movement, the proportional valve (100) comprising a closure element (305) which is arranged at an end of the closure element (301) remote from the first spring (302), and a second spring (304), the second spring (304) being arranged on the closure element (305) and the second spring (304) being configured in order to exert a second spring force on the closure element (305), the second spring force counteracting the

Abstract: The invention relates to a proportional valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (2), in which a closing element (10) arranged therein interacts with a valve seat (19) in order to open and close at least one passage opening (18). Furthermore, an armature device (25), which is operatively connected to the closing element (10), and an electromagnet (26) are provided, by means of which electromagnet a magnetic force can be produced on the armature device (25) and the armature device (25) can move reciprocatingly along a longitudinal axis (40) of the proportional valve (1). Moreover, the electromagnet (26) comprises an inner pole (14), an outer pole (13) and a solenoid coil (12) and the armature device (25) composes an armature (8). The valve housing (2) and the inner pole (14) are magnetically connected to each other by means of a magnetic choke point (20). The magnetic choke point (20) is formed in an axial region of extent of the armature (8).

Abstract: A conveying unit (1) for a fuel cell system (31) for conveying and/or recirculating a gaseous medium, in particular hydrogen, comprising a jet pump (4) driven by a driving jet of a pressurized gaseous medium, and comprising a metering valve (6) with a nozzle (12), wherein: the conveying unit (1) is designed as a combined valve jet pump assembly (2); the gaseous medium is fed to the jet pump (4) by means of the metering valve (6); the jet pump (4) has a main body (8); and the jet pump (4) is connected to an anode inlet (3) of a fuel cell (29).

Abstract: The invention relates to a proportional valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (2), on which a nozzle body (20) is formed. A closing element (18) is arranged in the valve housing (2), wherein the closing element (18) releases or blocks at least one passage opening (27) formed on the nozzle body (20) on a valve seat (30) formed on the nozzle body (20). Moreover, the closing element (18) is movably guided in a reciprocating manner in an axial guide (16) in the nozzle body (20).

Abstract: The invention relates to a proportional valve (100) for controlling a gaseous medium, in particular hydrogen, comprising a movable closure element (301) and a first spring (302) arranged on the closure element (301), the first spring (302) being configured in order to exert a first spring force on the closure element (301) in a closing direction, and an actuator (200), the actuator (200) being configured in order to provide an adjustable force in the opposite direction to the first spring force, the closure element (301) being configured in order to close and to open a through opening (102) by the movement, the proportional valve (100) comprising a closure element (305) which is arranged at an end of the closure element (301) remote from the first spring (302), and a second spring (304), the second spring (304) being arranged on the closure element (305) and the second spring (304) being configured in order to exert a second spring force on the closure element (305), the second spring force counteracting the

Abstract: The invention relates to a metering valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (2), wherein an interior space (3) is formed in the valve housing (2). A reciprocating closing element (10) is arranged in the interior space (3), which interacts with a valve seat (37) for opening or closing at least one passage channel (25). Furthermore, the metering valve (1) comprises a nozzle (11), the at least one passage channel (25) being formed in the nozzle (11) and the passage channel (25) having a circular-cylindrical portion.

Abstract: The invention relates to a proportional valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (2), in which a closing element (10) arranged therein interacts with a valve seat (19) in order to open and close at least one passage opening (18). Furthermore, an armature device (25), which is operatively connected to the closing element (10), and an electromagnet (26) are provided, by means of which electromagnet a magnetic force can be produced on the armature device (25) and the armature device (25) can move reciprocatingly along a longitudinal axis (40) of the proportional valve (1). Moreover, the electromagnet (26) comprises an inner pole (14), an outer pole (13) and a solenoid coil (12) and the armature device (25) composes an armature (8). The valve housing (2) and the inner pole (14) are magnetically connected to each other by means of a magnetic choke point (20). The magnetic choke point (20) is formed in an axial region of extent of the armature (8).

Abstract: A conveying device for a fuel cell system for conveying and/or recirculating a gaseous medium, in particular hydrogen, includes a recirculation fan, a jet pump that is driven by a motive stream of a gaseous medium that is under pressure, and a metering valve. The gaseous medium is supplied to the jet pump by the metering valve. The conveying device further includes an inlet fluidically connected to an anode outlet of the fuel cell and an outlet fluidically connected to an anode inlet of the fuel cell. The jet pump and the metering valve form a combined valve/jet-pump assembly. The components of the conveying device are positioned on a planar carrier element such that flow lines between and/or within the components extend only parallel to the planar carrier element. The planar carrier element is arranged between the fuel cell and the conveying device.

Abstract: The invention relates to a jet pump unit (46) comprising a pump housing (49), a metering valve (1) with a valve housing (2), a mixer tube area (52), an intake channel (43) and a runoff area (45), wherein a through-hole (2) that forms a through-opening (80) is designed in said pump housing (49). The metering valve (1) is received in the through-opening (80) and a first step (200) and a second step (202) are formed in said through-opening (80), radially with respect to a longitudinal axis (40) of the jet pump unit (46), for the purpose of radially centering and guiding the metering valve (1) in said pump housing (49).

Abstract: The invention relates to a metering valve (1) for controlling a gaseous medium, particularly hydrogen, comprising a valve housing (2), wherein an interior space (3) is formed in said valve housing (2). A movable closing element (10) is arranged in the interior space (3) along a longindinal axis (40) of the metering valve (1), and said element interacts with a valve seat (19) in order to open or close off an opening cross-section of an inflow region (28) into a through channel (18). Furthermore, the metering valve (1) comprisies a nozzle (15) in which the through channel (18) is formed and on which at least one sealing element (54) is arranged, wherein the sealing element (54) is designed to seal a gap (56) in an opening in which said nozzle (15) is received.

Abstract: A method for operating a line circuit (4) for waste heat utilization of an internal combustion engine (2), and a control unit (1). A feed pump (6), at least one heat exchanger (8), an expansion machine (10), a condenser (12) and a control unit (1) are situated in the line circuit (4). The control unit (1) calculates a time period which is required until individual components or all the components of the line circuit (4) have reached a predefined temperature, in order to start up the line circuit (4) at least partially.

Abstract: The invention relates to a device and a method for separating dirt particles from the working medium of a turbine (10). The turbine (10) comprises at least one rotor (11) which is arranged in a housing (17). A swirl generator (20) is provided that sets the working medium and the dirt particles in a spiral-shaped rotational movement along a principal axis (22) by means of the geometry of the swirl generator (20) and thereby separates the dirt particles from the working medium. The swirl generator (20) is designed in such a way that the working medium experiences a reversal of the speed component parallel to the principal axis (22) within the swirl generator (20).

Abstract: The invention relates to a fuel injection valve comprising a housing (1) in which pressure is applied to a nozzle needle (8), in a control chamber (28), at least indirectly with a closing force in the direction of a valve seat (10). The pressure in the control chamber (28) can be adjusted using a control valve (40) as said control chamber (28) is able to be connected to a low pressure chamber (46) via an outlet restrictor (31) and be filled with fuel at high pressure via an inlet restrictor (30). A longitudinally-displaceable control piston (29) is arranged in the control chamber (28) and divides said chamber (28) into a first control sub-chamber and a second control sub-chamber (228), the first control sub-chamber (128) being able to be connected to the low pressure chamber (46) by means of said outlet restrictor (31).