Abstract: A method for operating a fuel cell system involves operating the fuel cell with recirculation of anode exhaust gas below a predefined maximum load limit of the fuel cell and operating the fuel cell without recirculation of the anode exhaust gas between the load limit and the full load of the fuel cell.

Abstract: A brake disc includes a friction ring and a pot arranged concentrically in an opening of the friction ring. The pot has a pot gearing system with at least one pot tooth space, on which a flap is molded, which projects radially in the direction of a corresponding annular tooth of an annular gearing system of the friction ring and radially overlaps the annular tooth on a first axial end.

Abstract: A piston arrangement for a combustion chamber of an internal combustion engine having a variable compression ratio. A piston includes a device for the variable adjustment of the compression ratio associated with the combustion chamber, and a piston pin is coupled to the piston via respective connecting regions, via which piston pin the piston can be coupled to a connecting rod of the internal combustion engine. The device includes the piston pin having at least one eccentric element, which is eccentrically arranged with respect to the connecting regions of the piston pin and via which the piston pin can be coupled to the connecting rod.

Abstract: An apparatus is used for the recirculation of anode exhaust gases of a fuel cell, with a recirculation blower and at least one jet pump operated by a propulsion gas stream. The propelling medium is in this case a pressurized fuel, for example hydrogen. The anode outlet of the fuel cell is connected to the intake connection of the at least one jet pump. The outlet of the at least one jet pump is then connected to both the anode inlet and the intake connection of the recirculation blower. The output of the recirculation blower can be connected to the intake connection of the at least one jet pump.

Abstract: A microprocessor driven two dimensional search engine examines transmission operating points within a plurality of search range spaces and assists in determining properties associated with the driveline at various operating points within the space. The size of the space is reduced by rearrangement of data.

Abstract: A valve device for a gaseous medium of an airbag is provided. The valve device includes a textile layer, in particular a woven fabric, which is permeable with respect to the medium at least in certain regions. The valve device also includes at least one film covering the textile layer in at least one region and which forms at least one passage region of the valve device, which is at least substantially closed in a closed position of the valve device and open at least in certain regions in an at least temporary passage position of the valve device.

Abstract: A fuel cell system for a vehicle includes a burner for producing a heat flow by combustion of a fuel gas which reacts with an oxidant. A heating heat exchanger provided to heat a vehicle passenger compartment is arranged in a coolant circuit of the fuel cell system, and is externally heated, at least at times, by the burner.

Abstract: A fuel cell system includes at least one fuel cell, line elements for supplying and discharging starting materials and/or products to/from the fuel cell, and at least one condensation unit. The condensation unit is situated in at least one of the line elements and, at least in individual operating phases of the fuel cell, the condensation unit is at a lower temperature level than the areas surrounding it and the fuel cell.

Abstract: In a motor vehicle having an internal combustion engine disposed in an engine compartment provided with a hood, and also an electrical machine for at least assisting in driving the vehicle and generating electric energy, and a power electronics system for controlling the electric power supply to, and from the electric machine during operation of the motor vehicle by the internal combustion engine and/or the electrical machine, the power electronics system is arranged in the engine compartment above the internal combustion engine and below the hood.

Abstract: In a motor vehicle camshaft adjusting device which comprises an open- and/or closed-loop control unit for adjusting the camshaft phase position in a normal operating mode to a temporarily intermittently constant phase position, the open- and/or closed loop control unit has an engine start operating mode in which the camshaft phase position is advanced during opening of the valve so as to provide a valve opening angle range which is smaller than a geometric normal opening angle range based on a crankshaft angle range.

Abstract: A method for operating a production plant having a plurality of work stations to carry out at least one respective work step by a control system allocated to the production plant involves a control system assigning human workers or robots to work stations according to at least one criterion relating to a production requirement, wherein each worker or robot can be assigned to one or several work stations.

Abstract: In an internal combustion engine for a motor vehicle, having a first cylinder bank and a second cylinder bank and an exhaust tract including a first exhaust manifold and a second exhaust manifold with a first exhaust gas duct and a second exhaust gas duct and a first exhaust gas turbocharger including a first turbine situated in the exhaust tract and a second exhaust gas turbocharger including a second turbine arranged in the exhaust tract, the first turbine and the second turbine are selectively drivable in alternation by at least a portion of the exhaust gas via a valve device that is switchable between at least three positions and is situated upstream from the first turbine and the second turbine so that, in a first position of the valve device, the engine is operated in a pulse supercharging mode; in a second position of the valve device, the engine is operated in a ram charging mode and in a third position of the valve device, the engine is operated in a sequential supercharging mode.

Abstract: A method for operating a production plant having an unmanned transport system involves transporting a first parts carrier having a plurality of parts from a warehouse to a picking station by at least one industrial truck. At least one part, which is predetermined according to a parts list, is extracted from the parts carrier using a worker and deposition of the part on a further parts carrier. The further parts carrier is transported to a work station by a further industrial truck.

Abstract: The invention relates to a slide tool, in particular for press-fitting or crimping a friction ring of a brake disc with a pot of the brake disc. The invention furthermore relates to a brake disc, in particular of a motor vehicle, having a pot, which has a floor and a wall that protrudes from and encloses it, and having a friction ring, which has an opening in which the wall is arranged.

Abstract: An electrically conductive adhesive is disclosed for bonding anode and cathode flow field plates together for use in fuel cells. The adhesive formulation comprises epoxy methacrylate resin and non-fibrous carbon particles but little to no carbon fibres. The adhesive provides suitable strength, bond gap, conductivity and other properties, particularly for flow field plates made of flexible graphite, carbon, or metal.

Abstract: In an internal combustion engine comprising a plurality of cylinders with at least one cylinder head including inlet channels extending from an inlet flange surface to a cylinder inlet and outlet channels extending from a cylinder outlet to an opening in an outlet flange surface and an oil chamber provided in the cylinder head for supplying lubricant to an actuation device for gas exchange valves, the inlet flange and the outlet flange have flat surfaces which are arranged at an angle relatively to each other so that the surface planes intersect above the cylinder head and the cylinder head, as a result, has an essentially triangular cross-section.

Abstract: A method for protecting a vehicle occupant in a vehicle seat of a vehicle that includes at least one protection element arranged on the vehicle seat and that can be triggered in order to protect the vehicle occupant located on the vehicle seat is triggered in the event of an impending collision or in the event of a collision. A momentum (motion impulse) is exerted on the vehicle occupant or at least one body section of the vehicle occupant when the protection element is triggered. Due to the momentum the vehicle occupant or at least one body section of the vehicle occupant is moved away from a collision section of the vehicle that is colliding or will collide with the object. The intensity of the momentum is varied in relation to a determined accident severity and/or a determined accident type.

Abstract: A system for NOx reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO2, particulate filter, a source of reductant such as NH3 and an SCR catalyst. Considerable improvements in NOx conversion are observed.