Abstract: The invention relates to a variable valve control device (1) for internal combustion engines of the reciprocating-piston design having at least one gas exchange valve, which can be actuated by a camshaft (3) by means of a cam device (4) that is connected to the camshaft (3) for conjoint rotation and that has at least two different cam tracks (7, 8), which camshaft is supported in such a way that the camshaft can be rotated about a camshaft axis (2), wherein, selectively, one of the cam tracks (7, 8) can be activated and at least one other cam track (8, 7) can be deactivated by means of a control device (10), and wherein the control device (10) has at least one control element (11), which is guided axially, in particular within the camshaft, and by which at least one cam device (4) that is supported on the camshaft (3) for conjoint rotation but axially movably and that has at least two different cam tracks (7, 8) can be adjusted by means of at least one driving piece (12).

Abstract: The invention relates to a method for optimizing a driver assistance system having the work steps of defining at least one driver assistance system A to be optimized, determining at least one vehicle parameter function that is suitable for characterizing an operating state of a vehicle, and at least one environmental parameter function that is suitable for characterizing the surroundings of the vehicle, calculation of at least one driving situation characteristic function that characterizes a driving situation of the vehicle, particularly at least on the basis of the at least one vehicle parameter function and/or of the at least one environmental parameter function, calculation of at least one control intervention characteristic function that is suitable for characterizing the activity of the driver assistance system A, and calculation of a correction function that depends on the at least one driving situation characteristic function and characterizes a subjective perception of the driving situation by at lea

Abstract: In a test run, in order to easily provide a high-quality propulsion torque of a torque generator based on the partially low-quality measured variables available on the test bench, it is foreseen that an inner torque (Mi) of the torque generator (D) is measured and based on the measured inner torque (Mi), from an equation of motion, including the measured inner torque (Mi), a dynamic torque (Mdyn) and a shaft torque (Mw) measured on the output shaft of the torque generator (D), a correction torque ({circumflex over (M)}cor) is estimated, and from the estimated correction torque ({circumflex over (M)}cor) and the measured inner torque (Mi), the propulsion torque (Mv) according to the relation Mv={circumflex over (M)}cor+Mi is computed.

Abstract: The invention relates to a variable valve control device (1) for internal combustion engines of the reciprocating-piston design having at least one gas exchange valve (32), which can be actuated by a camshaft (3) by means of a cam device (4) that is connected to the camshaft (3) for conjoint rotation and that has at least two different cam tracks (7, 8), which camshaft is supported in such a way that the camshaft can be rotated about a camshaft axis (2), wherein, selectively, one of the cam tracks (7, 8) can be activated and at least one other cam track (8, 7) can be deactivated by means of a control device (10), and wherein the control device (10) has at least one control lever (12), which can be pivoted about a pivot axis (11), and has at least one first control body (13), which is connected to the camshaft (3) for conjoint rotation and in the surface of which at least one first control groove (17) and at least one second control groove (18) are formed, wherein, selectively, a first control stud (19) of the

Abstract: A method for producing an output data stream includes picking up and digitalizing a combustion chamber signal to a combustion chamber signal data stream and, simultaneously therewith, picking up and digitalizing a crankshaft angle signal to a crankshaft signal data stream. The combustion chamber signal data stream is split or duplicated into a first and a second combustion chamber signal data flow. The first combustion chamber signal data flow is filtered to a first filtered combustion chamber signal data stream and then transformed to a first transformed combustion chamber signal data stream. The second combustion chamber signal data flow is transformed to a second transformed combustion chamber signal data stream. The first and second transformed combustion chamber signal data streams are combined to an output data stream which comprises the first and second transformed combustion chamber signal data streams in a respective first and second crankshaft angle range.

Abstract: The aim of the invention is to allow a precise and quick regulation of the influencing variables in the operation of a fuel cell. A regulator is used for the regulation, said regulator being designed on the basis of a model of the gas conditioning unit in the form of a coupled nonlinear multivariable system in that the coupled nonlinear multivariable system is decoupled and linearized using Lie derivatives, and the regulator is designed for the decoupled linear multivariable system. The regulator calculates the control variables (uG, uS, uN, Q) for at least three present actuators of the influencing variables of the gas conditioning unit at each sampling time of the regulation using specified target variables (yj,dmd) and at least the three actuators of the gas conditioning unit adjust the calculated control variables (uG, uS, uN, Q at each sampling time of the regulation.

Abstract: The invention relates to a method for detecting an unsealed location in a heat recovery system of an internal combustion engine of a motor vehicle. The heat recovery system has at least one working medium, in particular a combustible working medium, and a working medium circuit with at least one evaporator, a pump, and at least one expansion machine to allow an early and reliable detection of leakages in the evaporator.

Abstract: Aspects of the present disclosure are directed to an internal combustion engine having a valve actuation device and at least one first exhaust valve and one second exhaust valve per cylinder. The first and second exhaust valves may be actuated together in at least one operating area of the internal combustion engine, via an exhaust valve bridge and a first valve lifter, by a first cam lobe of a first exhaust cam arranged on a camshaft. The camshaft having a second exhaust cam with at least one additional cam lobe and at least one second cam lobe A transmission device being arranged in the functional path between the second exhaust cam and the second exhaust valve, the transmission device allowing an idle stroke to be activated or deactivated. The first exhaust cam and the second exhaust cam are configured and arranged to be rotatable relative to one another.

Abstract: The invention relates to an energy generation unit comprising a high-temperature fuel cell stack (10), which is operated with liquid fuel, and a reformer (11) connected upstream of the fuel cell stack for processing the fuel, a recirculation line (13) for at least partially feeding back the anode exhaust gas into the reformer (1) and a device for feeding the liquid fuel into the anode exhaust gas. In accordance with the invention, the invention for feeding the fuel is in the form of an evaporator device (20), comprising a housing (21) which has an evaporator nonwoven (23) in the region of the fuel feed line (22), wherein the hot anode exhaust gas can be applied to said evaporator nonwoven from the recirculation line (13).

Abstract: The invention relates to a multi-speed transmission, comprising a power split device, an input shaft of the transmission being connected or connectable to prime mover, an output shaft, two shiftable sub-transmissions, each providing a plurality of different gear ratios, and at least one rotating electric machine, connected to said power split device, wherein the two sub-transmissions can be connected alternatively to the output shaft, and a control system, connecting said electric machine with an electric battery and auxiliary electrical consumers. The electric machine is connected to the power split device in a way to reduce torque value down to zero on either an input shaft of the first sub-transmission or on an input shaft of the second sub-transmission by applying different shaft torque levels, and the internal heat generation capacity of the electric machine exceeds the power capacity of the control system power line.

Abstract: The invention relates to a method for determining critical operating states in a fuel cell stack, consisting of single cells connected in series, wherein a low-frequency current or voltage signal is applied to the fuel cell stack, the resulting voltage or current signal is measured and the distortion factor thd is determined. According to the invention, the weighted sum of a term dependent on the membrane resistance RM and a term dependent on the distortion factor thd is used to determine an indicator THDAdryout correlating with the drying out of the fuel cell membranes of the fuel cell stack, the membrane resistance Rm being detected by impedance measurement.

Abstract: In order to create a control observer for any battery type in a structured and at least partially automated manner, first, a nonlinear model of the battery, in form of a local model network including a number of local, linear, time-invariant, and dynamic models, which each have validity in specific ranges of the input variables, is determined from the measuring data of a previously ascertained, optimized experimental design via a data-based modeling method. For each local model (LMi) of the model network determined in this manner, a local observer is then determined. The control observer (13) for estimating the SoC then results from a linear combination of the local observers.

Abstract: To determine a model for an output quantity (y) of a technical system that is dependent in a nonlinear manner on a number of input quantities in the form of an input quantity vector (u), a target output quantity range (COR) is defined and a model-based experimental design is determined with which the model is parameterized in the target output quantity range (COR) through the selection of associated input quantity vectors (ucand,COR). A distance-based selection criterion is used for the selection of the input quantity vectors (ucand,COR).

Abstract: The present invention relates to a generator unit (1) having a housing (10), a fuel cell device (20), which is arranged in an interior space (10a) of the housing (10), a gas-carrying duct (30) having an upstream opening (30a) and a downstream opening (30b), a valve (40), which is provided, in particular set up, to connect the interior space (10a) to the duct (30) at least at times in a gas-carrying manner, a driving device (50), which moves gas within the duct (30) from the upstream opening (30a) to the downstream opening (30b), and a sensor device (60), which is arranged in a downstream direction of the duct (30) starting from the valve (40) and is designed to detect at least one parameter of the gas. The present invention also relates to a method for monitoring a generator unit.

Abstract: A method for testing electrical energy storage systems for driving vehicles provides that the load current of the energy storage system traces by means of a control loop, if possible without delay, a reference current that varies over time according to predetermined test cycles. The control loop is created by means of a model-based controller design method in which a model of the impedance of the energy storage system is integrated in the model of the controlled system.

Abstract: The present invention relates to a method for shutting down a generator unit (1) comprising a fuel cell device (100) having the steps (a) shutdown of a current generation via a control unit (510); (b) detection of at least one anode temperature of an anode (122) of the fuel cell device (100), in particular during a cool-down process; (c) blocking of an escape of carbon monoxide from an anode chamber (120) in which the anode (122) is arranged at least partially, in particular, at least for the most part, completely, if the anode temperature is higher than the first limit temperature T1; (d) at least partial removal of carbon monoxide from an anode chamber (120) in which the anode (122) is arranged at least in part, in particular, at least for the most part, completely, if the anode temperature falls below a first limit temperature T1. The present invention further relates to a generator unit (1), a vehicle having this generator unit (1) and a use of this generator unit (1).

Abstract: The present invention relates to a generator unit (1) comprising a housing (100) having at least one opening (112), a fuel cell device, which is arranged in the housing (100), a tail pipe device (200) having at least one exhaust pipe (210), which is connected to the fuel cell device in a gas-carrying manner and extends through the opening (112) of the housing (100), and an insulator (220), which extends at least in an area between an outer wall of the exhaust pipe (210) and an edge of the opening (112) and, in particular, reduces, in particular, at least for the most part, prevents, heat transfer from the exhaust pipe (210) to the housing (100). Furthermore, the present invention relates to a tail pipe device (200) for use in a generator unit (1) of the type described here.

Abstract: In order to reduce the excitation of vibrations and resonances in a test bed for a real component and a virtual component, one of the following method steps is provided: a) determining a first correction value (K1) from the measured variable (M), wherein the first correction value (K1) is added to the measured variable (M) and the sum is communicated as a corrected measured variable (M*) to the virtual component for calculating the control variable (S), b) determining a second correction value (K2) from the calculated control variable (S), wherein the second correction value (K2) is added to the calculated control variable (S) and the sum is transferred as a corrected control variable (S*) to the actuator, c) determining a third correction value (K3) from the measured variable (M), wherein the third correction value (K3) is used to modify a parameter (P) of the equation of movement.

Abstract: A method for evaluating a transmission device using various characteristic values, wherein said characteristic values can be determined by means of variable or constant parameters.

Abstract: The invention relates to a length-adjustable connecting rod (1) for a reciprocating-piston machine, in particular for an internal combustion engine, comprising at least one first rod part (6) having a small connecting rod eye (2) and a second rod part (9) having a large connecting rod eye (4), which two rod parts can be moved in relation to each other and/or in each other in a telescopic manner, wherein the second rod part forms a guiding cylinder (8) and the first rod part forms a piston element (7) that can be longitudinally displaced in the guiding cylinder, wherein a first high-pressure chamber (10) is spanned between the second rod part and the piston element on the side of the piston element facing the large connecting rod eye, into which first high-pressure chamber at least one first oil channel (20) leads, in which in particular a first check valve (21) opening in the direction of the first high-pressure chamber is arranged, wherein at least a first return channel (22) extends from the first high-pres