Abstract: A fuel cell system includes at least one fuel cell having an anode chamber, a cathode chamber, a hydrogen pressure reservoir, a recirculation line connecting an outlet of the anode chamber to an inlet of the anode chamber, a recirculation conveyor with a compressor wheel in the region of the recirculation line, and a turbine for expanding the hydrogen that is under pressure before entry into the anode chamber. The recirculation conveyor is driven at least partially by the turbine. The turbine and the compressor wheel are formed in one component.

Abstract: A method for non-releasable fixing of at least one component to a further component is provided in which a hot rivet is introduced into an opening of the at least one first component and an end face of a shank of the hot rivet is welded to a surface of the further component. Subsequently, with plastic deformation of the hot rivet, the shank of the hot rivet is compressed until a head of the hot rivet lies with a pre-stressing force at least in areas on a surface of the at least one component. The pre-stressing force, with which the head of the hot rivet lies at least in areas on the surface of the at least one component, is adjusted to a predefined value.

Abstract: In a motor vehicle drive arrangement having a main drive train for driving a main axle and an auxiliary drive train for driving an auxiliary drive axle, with a power shift clutch for connecting the auxiliary drive train to the main drive train, the auxiliary drive train comprises at least one switching unit for engaging the power shift clutch which is arranged in the power flow in series with the switching unit without a differential speed.

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 fuel cell system includes at least one fuel cell arranged in a housing and an conveyor means for air supply for a cathode region of this fuel cell. A partial air flow branches off from the supply air to the fuel cell after the conveyor, the partial air flow flowing as bearing air and/or cooling air at least through a part of the conveyor. The partial air flow flows in the flow direction before or after the conveyor as scavenging air through the housing of the fuel cell.

Abstract: An exhaust gas aftertreatment installment and associated exhaust gas aftertreatment method utilizes a nitrogen oxide storage catalytic converter and an SCR catalytic converter. A particulate filter is provided upstream of the nitrogen oxide storage catalytic converter or between the latter and the SCR catalytic converter or downstream of the SCR catalytic converter. The time of regeneration operating phases of the nitrogen oxide storage catalytic converter can be determined as a function of the nitrogen oxide content of the exhaust gas downstream of the nitrogen oxide storage catalytic converter or of the SCR catalytic converter and/or as a function of the ammonia loading of the latter. Moreover, a desired ammonia generation quantity can be determined for a respective regeneration operating phase. The installation and method are adopted for use for motor vehicle internal combustion engines and other engines which are operated predominantly in lean-burn mode.

Abstract: A supply assembly and a fuel cell system having a supply assembly that demonstrates a cost-effective and/or resilient design in operation. A supply assembly for coupling to a fuel cell device is proposed, having a gas-to-gas humidifier that is designed and/or arranged in order to humidify the oxidation means A for the fuel cell device by means of the humidity from the exhaust gases B of the fuel cell device has an exhaust gas region and an oxidation means region that are separated from one another by a separation layer. The separation layer enables a transmission of the humidity from the exhaust gas region into the oxidation means region for humidification of the oxidation means A, wherein the gas-to-gas humidifier has a monolithic honeycomb structure for fowling the exhaust gas region and the oxidation means region.

Abstract: A steel piston with a piston upper part (12) with combustion chamber recess (11) and ring wall (5), and with a piston lower part (13) with piston body or piston skirt and with connecting rod bearing (8) for internal combustion engines with cylinder crankcases made of lightweight metal alloys, with at least the piston lower part consisting of a steel alloy which has a coefficient of thermal expansion in the range from 13 to 20×10?6 1/K.

Abstract: A center console of a motor vehicle has a cover that is able to be opened, which closes a storage compartment that lies thereunder in its closed position and releases this in an open position. A comfortable adjustment of the cover is possible via an adjustment mechanism. The adjustment mechanism is formed in such a way that it first lifts the cover during opening and adjusts it backwards and subsequently swings it upwards.

Abstract: A rotor arm for an electrical machine having a support pot, which includes a hub for the mounting of a drive shaft, for mounting at least one magnetic element is provided. The rotor arm includes a supporting disk arranged on a support pot at a distance axially from the hub. The supporting element has a passage aligned with the hub for mounting the drive shaft.

Abstract: A method for operating an exhaust emission control system of a motor vehicle internal combustion engine, in the exhaust gas line of which an oxidation-catalytically active exhaust emission control component is arranged upstream of a SCR-catalyst is provided. An ageing state of the oxidation-catalytically active exhaust emission control component is determined by correlating a hydrocarbon fraction present in the exhaust emission upstream of the oxidation-catalytically active exhaust emission component with a simultaneous nitrogen oxide conversion of the SCR-catalyst.

Abstract: A method for environmental representation, in which two images of an environment (U) are taken respectively and a disparity image is determined by means of stereo image processing. An unobstructed free space (F) is identified in the disparity image, in that each pixel of the disparity image is allocated either to the unobstructed ground surface (B) or to one of several segments (S11 to Snu) depending on disparity values of the respective pixel. Segments (S11 to Snu) of the same width are formed from pixels of the same or similar distance to an image plane. An object (O1 to Ok) located outside of the free space (F) is modelled in the environment (U) using one segment (S11 to Snu) or several segments (S11 to Snu).