Abstract: The invention relates to a device for holding and fastening a bus bar (1) to a substrate (2), in particular to a metallic housing (10), having: a metallic supporting body (3) for supporting the bus bar (1) on the substrate (2), a thermally conductive and electrically insulating intermediate layer (4) for arrangement between the supporting body (3) and the substrate (2), a holding element (6) which can be fixed to the substrate (2) with the aid of a fastener (5), and a clamping and/or resilient element (7) for applying a preloading force to the supporting body (3) in the direction of the substrate (2) directly or indirectly via the holding element (6). The invention also relates to a metallic housing (10) having a device according to the invention.

Abstract: The invention relates to a pressure-controlled shut-off valve (1) for temporarily interrupting the air supply to a fuel cell stack in a fuel cell system, comprising a valve piston (3) which can be moved back and forth in a cylindrical housing bore (2) and which is biased in the direction of a seal seat (5) by the spring force of a spring (4), wherein a connection between an air inlet channel (6) and an air outlet channel (7) is produced or interrupted depending on the axial position of the valve piston (3). According to the invention, the valve piston (3) delimits a spring chamber (8), which receives the spring (4) and to which ambient pressure is applied, on one side and a control chamber (9), which is connected to the air inlet channel (7), on the other side within the housing bore (2). The invention additionally relates to a fuel cell system comprising a shut-off valve (1) according to the invention.

Abstract: The invention relates to a shut-off valve (1) for temporarily interrupting the supply of air to a fuel cell stack in a fuel cell system, said shut-off valve comprising a valve piston (3) which can move back and forth in a cylindrical housing bore (2) and is prestressed in the direction of a sealing seat (5) by the spring force of a spring (4), wherein a connection between an air inlet duct (6) and an air outlet duct (7) is established or interrupted depending on the axial position of the valve piston (3). According to the invention, inside the housing bore (2), one end of the valve piston (3) delimits a spring chamber (8) which accommodates the spring (4) and is subjected to ambient pressure, and the other end thereof delimits a control chamber (9) which can be connected to the air inlet duct (7) via a control valve (10). The invention also relates to a fuel cell system comprising a shut-off valve (1) according to the invention.

Abstract: The invention relates to a pressure-controlled shut-off valve (1) for temporarily interrupting the air supply to a fuel cell stack in a fuel cell system, comprising a valve piston (3) which can be moved back and forth in a cylindrical housing bore (2) and which is biased in the direction of a seal seat (5) by the spring force of a spring (4), wherein a connection between an air inlet channel (6) and an air outlet channel (7) is produced or interrupted depending on the axial position of the valve piston (3). According to the invention, the valve piston (3) delimits a spring chamber (8), which receives the spring (4) and to which ambient pressure is applied, on one side and a control chamber (9), which is connected to the air inlet channel (7), on the other side within the housing bore (2). The invention additionally relates to a fuel cell system comprising a shut-off valve (1) according to the invention.

Abstract: The invention relates to a fuel cell system (100) having at least one fuel cell stack (101), an air path (10), wherein air from the surroundings reach the fuel cell stack (101) via the air path (10), an exhaust gas path (12), a fuel line (20), wherein fuel is transported to the fuel cell stack (101) via the fuel line (20). According to the invention, the air path (10) is connected to a cooling line (30) via a branch (33), wherein the cooling line (30) is connected to a PDU unit (32).

Abstract: The invention relates to a method for operating a fuel cell system, in which method a supply of air to a fuel cell stack (20) is interrupted intermittently, in particular in the event of a standstill of the system, by means of a pressure-controlled shutoff valve (1), which comprises a valve element (4), which valve element can be moved back and forth between two end positions and is preloaded toward a sealing seat (3) by means of the spring force of a closing spring (2). According to the invention, in at least one of the two end positions, the valve element is held in the end position in question additionally by means of the magnetic force of an electromagnet (5) and/or of a permanent magnet (6), the electromagnet (5) and/or the permanent magnet (6) interacting with a magnetic or magnetizable part (7) of the valve element (4).

Abstract: The invention relates to a fuel cell system (200) having a valve (10) in a valve housing (50), the valve (10) having: a) a drive unit (12), b) an elongate rotor (20) with a first rotor section (21) and a second rotor section (22), the second rotor section (22) having: I. a first radially circumferential projection (31), II. a second radial projection (36), which is spaced at a distance (d1) from the first radially circumferential projection (31) and has at least one opening (39) for the passage of the fluid of the fluid source (102), c) a main valve plate (60) which is movably mounted on the second rotor section (22) and has a rotor hole (62).

Abstract: The invention relates to a fuel cell system comprising a fuel cell stack (2) received in a first housing (1) and an energy supply unit received in a second housing (3), the two housings (1, 3) being connected or being capable of being connected in such a manner that openings (4, 5) provided in the housings (1, 3) are opposite one another and overlap, at least in part. According to the invention, an insert (6), which surrounds a pin or sleeve-shaped contact element (7) is arranged in the area of two opposing and at least in part overlapping openings (4, 5), wherein the insert (6) directly, or indirectly via a sealing ring (8), encloses the contact element (7) in a watertight manner and isolates same electrically at least against one of the two housings (1, 3).

Abstract: A method for adjusting the valve stroke or a closing duration of a solenoid valve for actuating a fuel injector includes first screwing a magnet adapter nut in a first screwing course on an injector body until a target stroke for the valve stroke is attained at a first torque. Upon attainment of the target stroke at the first torque, a further rotation takes place, at a differential torque. Next, the magnet adapter nut is unscrewed until a torque is reliably undershot. After that, rescrewing of the magnet adapter nut takes place in a second screwing course until the target stroke is attained at a second torque.

Abstract: The invention relates to an injector for injecting fuel into combustion chambers. According to the invention, a valve piston of a control valve is provided with low pressure on both faces thereof. The valve piston is arranged in a valve chamber hydraulically connected to a control chamber and is guided inside a sleeve received in the valve chamber. The valve chamber contains a spring supported on one end against the sleeve and on the other end on the valve piston such that the spring presses the valve piston onto a valve seat and the sleeve onto an opposing bottom surface. The valve piston diameter inside the sleeve corresponds to the effective valve piston diameter at the valve seat.

Abstract: The invention relates to a fuel injector having a magnetic assembly, a magnetic core, and a magnetic coil. The magnetic assembly is accommodated in a magnetic sleeve. The magnetic sleeve is provided with feedthroughs for electric contacting pins of the magnetic coil. Elastic sealing elements are inserted into the feedthroughs of the magnetic sleeve such that a pretensioning force acting in radial direction is applied to the contacting pins of the magnetic coil in the mounted state.

Abstract: The invention relates to a method for adjusting the valve stroke or a closing duration of a solenoid valve for actuating a fuel injector. First, the screwing of a magnet adapter nut in a first screwing course on an injector body is effected until a target stroke for the valve stroke is attained at a first torque. Upon attainment of the target stroke at the first torque, a further rotation takes place, at a differential torque. Next, the magnet adapter nut is unscrewed until a torque is reliably undershot. After that, rescrewing of the magnet adapter nut takes place in a second screwing course until the target stroke is attained at a second torque.

Abstract: The invention relates to an injector for injecting fuel into combustion chambers. According to the invention, a valve piston of a control valve is provided with low pressure on both faces thereof. The valve piston is arranged in a valve chamber hydraulically connected to a control chamber and is guided inside a sleeve received in the valve chamber. The valve chamber contains a spring supported on one end against the sleeve and on the other end on the valve piston such that the spring presses the valve piston onto a valve seat and the sleeve onto an opposing bottom surface. The valve piston diameter inside the sleeve corresponds to the effective valve piston diameter at the valve seat.

Abstract: The invention relates to a fuel injector having a solenoid valve which actuates a multi-part armature assembly. The armature assembly comprises an armature bolt, an armature bolt which is acted on by a valve spring, and an armature plate. As a result of the lifting motion of the armature bolt, a closing element is opened or closed, whereby an injection valve member can be actuated, in order to relieve the pressure in a control space. The armature plate is guided, decoupled from the armature bolt, on an armature guide.