Abstract: A foil bearing (10) having at least one foil (16, 18), which is arranged and fixed in place inside a bearing bushing (12). In order to simplify the production, in particular assembly, of the foil bearing (10), the bearing bushing (12) has at least two openings (20, 22, 24) offset from each other in the circumferential direction of the bearing bushing (12) or depressions (120, 122, 124) made in the inner lateral surface of the bearing bushing, into which openings or depressions two opposing circumferential end sections (16 a, 16 b, 18 a, 18 b) of the at least one foil (16, 18) engage.

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19), the first bead (15) and the second bead (19) being arranged opposite one another and forming a channel (21), the first bead (15) and the second bead (19) each comprising a central base surface (23) and at least two inclined surfaces (24) and the first bead (15) and/or the second bead (19) comprising at least one outer base surface (25), and wherein the at least one outer base surface (25) and/or the central base surface (23) have at least one opening (27) for the passage of at least one medium (29). The invention also relates to an arrangement of electrochemical cells (1) and a method for operating an arrangement of electrochemical cells (1).

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19), the first bead (15) and the second bead (19) being arranged opposite one another and forming a channel (21), the first bead (15) and the second bead (19) each comprising a central base surface (23) and at least two inclined surfaces (24), and the first bead (15) and/or the second bead (19) comprising at least one outer base surface (25).

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising a first monopolar plate (13) and a second monopolar plate (17), at least one port (55), a seal (47), and an active surface (53), wherein the first monopolar plate (13) and/or the second monopolar plate (17) have at least one opening element (111) for the passage of at least one medium (29), the at least one opening element (111) is located between the at least one port (55) and the active surface (53) and has a first opening surface (113) and a second opening surface (115), wherein the first opening surface (113) and the second opening surface (115) have a common lateral line (117), and the first opening surface (113) and the second opening surface (115) are arranged at a deflection angle (119) to one another in a range of 30° to 120°. The invention also relates to an arrangement (69) of electrochemical cells (1) and to a method for operating the arrangement (69) of electrochemical cells (1).

Abstract: The invention relates to a method (100) for operating an inverter (1) which selectively connects each of three alternating current phases (U, V, W) of an inductive load (4) to the plus pole or minus pole of a direct current (2) provided at the input (1a) of the inverter (1) by actuating switching elements (3a-3f) arranged in three half bridges (5a-5c), wherein the switch states of the switching elements (3a-3f) are modified (110) by a rotating space vector modulation. Additionally, in the event of a modulation between space vectors (6a-6f) which have the same switch element (3a, 3d; 3b, 3e; 3c, 3f) switch states with respect to at least one half bridge (5a-5c), such a half bridge (5a-5c) remains completely deactivated (120).

Abstract: The invention relates to a fuel cell system (1) comprising a fuel cell stack (2) with a cathode (3), to which air can be fed as cathode gas via a cathode gas path (4), an air compressor (5) being integrated in the cathode gas path (4). According to the invention, the cathode gas path (4) branches downstream of the air compressor (5) into a main path (4.1), which can be connected to an inlet (6) of the fuel cell stack (2), and into a secondary path (4.2), which can be connected to an outlet (7) of the fuel cell stack (2), wherein the main path (4.1) and the secondary path (4.2) can each be shut off individually or together with the aid of a shut off device (8). The invention also relates to a method for operating a fuel cell system (1).

Abstract: The present invention relates to a fuel cell stack (10) and to a method for producing such a fuel cell stack (10). The fuel cell stack (10) comprises at least two fuel cell modules (58) with in each case at least two individual cells (5), each fuel cell module (58) having module end plates (70) on both cell stack outer sides (66), and fuel cell stack compression means (82), via which the fuel cell modules (58) stacked one on top of the other are braced to form a fuel cell stack (10).

Abstract: The invention relates to a bearing arrangement for a shaft in a turbocompressor having at least one water-fed hydraulic bearing, which is configured to support for rotation an axle of the turbocompressor, wherein the water-fed hydraulic bearing encloses the shaft at a circumference of the shaft to form a bearing gap therebetween; and wherein the water-fed hydraulic bearing is configured to allow water to flow through the bearing gap to support the shaft hydraulically; and two seals, which are designed to seal the bearing gap against the shaft; and wherein gas from the turbocompressor is applied to the two seals outside the bearing gap to seal the bearing.

Abstract: The invention relates to a method (100) for operating an inverter (1) which selectively connects each of three alternating current phases (U, V, W) of an inductive load (4) to the plus pole or minus pole of a direct current (2) provided at the input (1a) of the inverter (1) by actuating switching elements (3a-3f) arranged in three half bridges (5a-5c), wherein the switch states of the switching elements (3a-3f) are modified (110) by a rotating space vector modulation. Additionally, in the event of a modulation between space vectors (6a-6f) which have the same switch element (3a, 3d; 3b, 3e; 3c, 3f) switch states with respect to at least one half bridge (5a-5c), such a half bridge (5a-5c) remains completely deactivated (120).

Abstract: The invention relates to a foil bearing (10) having at least one foil (16, 18), which is arranged and fixed in place inside a bearing bushing (12). In order to simply the production, in particular assembly, of the foil bearing (10), the bearing bushing (12) has at least two openings (20, 22, 24) offset from each other in the circumferential direction of the bearing bushing (12) or depressions (120, 122, 124) made in the inner lateral surface of the bearing bushing, into which openings or depressions two opposing circumferential end sections (16a, 16b, 18a, 18b) of the at least one foil (16, 18) engage.

Abstract: The present invention relates to a fuel cell stack (10) and to a method for producing such a fuel cell stack (10). The fuel cell stack (10) comprises at least two fuel cell modules (58) with in each case at least two individual cells (5), each fuel cell module (58) having module end plates (70) on both cell stack outer sides (66), and fuel cell stack compression means (82), via which the fuel cell modules (58) stacked one on top of the other are braced to form a fuel cell stack (10).

Abstract: The invention relates to a device for metering two different liquid or gaseous fuels, comprising a nozzle element (4) in which a first pressure chamber (6) that can be filled with a first fuel is formed, wherein an outer nozzle needle (10) is received in the pressure chamber in a longitudinally movable manner. The outer nozzle needle (10) is equipped with a second pressure chamber (12) which can be filled with a second fuel and in which an inner nozzle needle (15) is arranged in a longitudinally movable manner, said inner nozzle needle interacting with an inner nozzle seal (16) formed in the outer nozzle needle (10) in older to open and close at least one inner injection opening (17). Furthermore, at least one outer injection opening (13) is provided which can be connected to the first pressure chamber (6), the at least one outer injection opening (13) being formed in the outer nozzle needle (10).

Abstract: The invention relates to a device for metering two different liquid or gaseous fuels, comprising a nozzle element (4) in which a first pressure chamber (6) that can be filled with a first fuel is formed, wherein an outer nozzle needle (10) is received in the pressure chamber in a longitudinally movable manner. The outer nozzle needle (10) is equipped with a second pressure chamber (12) which can be filled with a second fuel and in which an inner nozzle needle (15) is arranged in a longitudinally movable manner, said inner nozzle needle interacting with an inner nozzle seal (16) formed in the outer nozzle needle (10) in older to open and close at least one inner injection opening (17). Furthermore, at least one outer injection opening (13) is provided which can be connected to the first pressure chamber (6), the at least one outer injection opening (13) being formed in the outer nozzle needle (10).

Abstract: The invention relates to a fuel metering device for regulating the delivery rate of a high-pressure fuel pump of a fuel injection device for an internal combustion engine. The fuel metering device has a control valve actuated by an electromagnet and having a valve member. The electromagnet has an armature and an armature rod and the armature rod is axially movably supported in at least one bushing. The at least one bushing is designed as a solid, one-piece metal component. The bushing is preferably made of steel and the bearing surface thereof, in which the armature rod is supported, has a nitrocarburized and polished surface layer.

Abstract: The present invention relates to a fuel metering device for a fuel injection system for internal combustion engines having a plastic housing. According to the invention, the fuel metering device includes a control valve having a valve piston which is actuated by an actuating device. Furthermore, the plastic housing can be produced by spray-coating.

Abstract: The present invention relates to a fuel metering device for a fuel injection system for internal combustion engines having a plastic housing. According to the invention, the fuel metering device includes a control valve having a valve piston which is actuated by an actuating device. Furthermore, the plastic housing can be produced by spray-coating.

Abstract: The invention relates to a fuel metering device for regulating the delivery rate of a high-pressure fuel pump of a fuel injection device for an internal combustion engine. The fuel metering device has a control valve actuated by an electromagnet and having a valve member. The electromagnet has an armature and an armature rod and the armature rod is axially movably supported in at least one bushing. The at least one bushing is designed as a solid, one-piece metal component. The bushing is preferably made of steel and the bearing surface thereof, in which the armature rod is supported, has a nitrocarburized and polished surface layer.

Abstract: The invention relates to an expansion device for a refrigerant, in particular an expansion device to control the high-pressure level of an air conditioner. In accordance with the invention, it is provided that the expansion device (16) is a sliding seat valve (22). In addition, the invention relates to an air conditioner (10), in particular an air conditioner (10) for a motor vehicle, with a compressor (12), a condenser or gas cooler (14), an expansion device (16) as well as an evaporator (18). In accordance with the invention, it is proposed that the expansion device (16) is formed by at least one sliding seat valve (22).

Abstract: To reduce the space of a control device having a power circuit and an electronic component, the power circuit including components to which higher currents are applied, in particular currents in the range of 5 A to 70 A, and the electronic component including a switching logic realized on a circuit board, the electrical connections between the components of the power circuit are realized by a single-layer pressed screen. Receptacles for the contact pins of the components are formed in the pressed screen. The receptacles are arranged and formed in such a way that the components are held in frictional engagement in the receptacles and are electrically contacted via the contact pins.

Abstract: To effectively prevent uneven wear of a moving mover 70 and to stabilize the control characteristics by a valve. Rotation force is exerted to the mover 70 by the fluid flowing from the first chamber to the second chamber, or vice versa, which are formed at the opposite ends of the mover 70. With respect to a flow passageway 110 formed within an anchor 72 and for allowing passage of the fluid therethrough, there are provided a passageway portion 111 which is disposed along the axial direction and another passageway portion 112 which crosses the axial direction. By this, rotation force is generated at the time the fluid passes from the former passageway portion 111 to the latter passageway portion 112 (or vice versa) which crosses the axial direction.