Abstract: A device for measuring flow processes of fluids. The device includes an inlet, an outlet, a drive unit, a positive displacement flow meter which is driven by the drive unit, the positive displacement flow meter including a positive displacement chamber, a supply duct which fluidically connects the positive displacement chamber to the inlet, a discharge duct which fluidically connects the positive displacement chamber to the outlet, a bypass which bypasses the positive displacement flow meter, a differential pressure sensor arranged in the bypass, and an evaluation and control unit which provides a control of the positive displacement flow meter based on a differential pressure applied to the differential pressure sensor. The supply duct and the discharge duct each rise in a fluid flow direction.

Abstract: The invention relates to a system comprising a plurality of first sensors to measure parameters characterizing a vehicle operating state; a second sensor to measure a parameter characterizing an emission of an fuel processing apparatus; a control device to measure repeatedly over a predefined time period and to determine a vehicle operating state based on a first data set with measured values from the plurality of first sensors and predefined parameter ranges describing a predefined vehicle operating state; an allocation device to allocate a second data set comprising measured values from the second sensor to the predefined vehicle operating state; and an evaluation device to determine a characteristic value for assessing or optimizing the operating behavior of the vehicle based on the vehicle operating state and the second data set, wherein the characteristic value characterizes an energy efficiency of the vehicle or an emission behavior of the fuel processing apparatus.

Abstract: A length-adjustable connecting rod has a first rod part and a second rod part, with the rod parts being displaceable telescopically toward and/or in one another by means of a length-adjusting means, and with the length-adjusting means being chargeable via a hydraulic channel with a hydraulic medium. The hydraulic channel is fluidly connectable by means of a control device to a hydraulic medium supply channel. The control device has a first and a second valve, each with a valve chamber and each with a valve body that can be pressed by a restorative force against a valve seat. The valve chamber of the first valve is fluidly connected to a first hydraulic channel, and the second valve chamber of the second valve to a second hydraulic channel. The valve bodies are operatively interconnected via a connecting device that can be displaced between a first position and a second position.

Abstract: A length-adjustable connecting rod for an internal combustion engine, comprises a first connecting rod member, a second connecting rod member and at least one cylinder-piston assembly for adjusting the first connecting rod member relative to the second connecting rod member. The cylinder-piston assembly can be actuated by way of a hydraulic adjustment mechanism, where the hydraulic adjustment mechanism comprises at least one oil filter in order to filter the engine oil of the internal combustion engine flowing into the cylinder-piston assembly. The invention further relates to an internal combustion engine with such a length-adjustable connecting rod and the use of such a cylinder-piston assembly for a length-adjustable connecting rod of an internal combustion engine.

Abstract: The present invention relates to a fuel cell system (100a, 100b, 100c) comprising a fuel cell stack (5) having an anode portion (5a) and a cathode portion (5b), a reformer (3) for reforming fuel for use in the anode portion (5a) of the fuel cell stack (5), and a fuel tank (1) for providing the fuel to the reformer (3), wherein downstream of the fuel tank (1) and upstream of the reformer (3) there is located a desulphurization unit (2) with an adsorber (2a) for the adsorptive desulphurization of fuel, which is conducted from the fuel tank (1) via the desulphurization unit (2) to the reformer (3), wherein the adsorber (2a) is provided with anodes (5a) and cathode portions (5b) and/or an internal combustion engine (11) of the fuel cell system (100a; 100b; 100c) is in fluid communication by means of a regeneration fluid line (12), wherein fluid heated by the regeneration fluid line (12) can be conveyed from the anode portion (5a) and cathode portion (5b) and/or from the internal combustion engine (11) to the adso

Abstract: The invention relates to a liquid-cooled internal combustion engine comprising at least one cylinder block which has a cooling jacket (1) and comprises multiple cylinders (2). The cooling jacket (1) has a base (3) facing a crankcase and a cover (4) facing a cylinder head sealing plane (4a), and the base (3) has an undulating course when seen in a lateral view of the cylinder block. A first spacing (H2) between two adjacent cylinders (2) in the region of at least one first motor transverse plane (8) is larger than a second spacing (H2) between the base (3) of the cooling jacket (1) and the cover (4) in the region of at least one second motor transverse plane (10) containing the cylinder axis (9) when measured in the direction of the cylinder axis (9) in both cases.

Abstract: The invention relates to a method the assessing the controllability of a vehicle by a driver in a risky or problematic situation. In order to carry out assessment of the controllability of a vehicle early, the following steps are provided: a. modelling the drive train and the movement dynamics of the vehicle, b. modelling situation conditions and environmental conditions, c. selecting a risky or problematic situation, d. selecting a driver capability type, e. modelling the driver's reaction as a function of the selected driver capability type. f. simulating the dynamic vehicle behaviour in the longitudinal and transverse directions of a planned trajectory on the basis of the drive train model and movement dynamics model for the predefined situation and environmental conditions when the selected risky or problematic situation occurs, g.

Abstract: According to the invention, in an energy accumulator emulation the accuracy of energy accumulator emulation is increased in that a load current demand on the energy accumulator (20) is converted to a cell tester load current (IZ) of a real reference cell (6) based on the configuration of the energy accumulator (20) and the cell tester load current (IZ) is applied to the reference cell (6), and thereby the cell voltage (UZ) of the reference cell (6) is measured and the cell voltage (UZ) of the reference cell (6) is converted to a first energy accumulator voltage (UB) based on the configuration of the energy accumulator (20), a second energy accumulator voltage (UB_Mod) is calculated from the energy accumulator model (10) and the load current demand and the first energy accumulator voltage (UB) is compared to the second energy accumulator voltage (UB_Mod) and the energy accumulator model (10) is adjusted if the first energy accumulator voltage (UB) deviates by a specified tolerance range (TB) from the second en

Abstract: A multi-phase synchronous converter consisting of a plurality of half bridges which in turn consist of an upper power switch and a lower power switch, the converter being actuated by a pulse width modulation dependent on a predetermined pulse duty cycle in the range of zero to one hundred percent. The multi-phase synchronous converter generates an output current and is operated in a normal mode in which the power switches switch with a normal switching period defined by a predetermined normal switching frequency, and a normal pulse duration dependent on the actual pulse duty cycle. As soon as the pulse duty cycle exceeds an upper duty cycle threshold or falls below a lower duty cycle threshold, the multi-phase synchronous converter is switched from the normal mode into an operating mode in which at least one of the power switches of at least one half bridge is deactivated.

Abstract: The invention relates to a fuel cell system (100) having a fuel supply unit (8) and fuel cells (1, 2) having a cathode (4, 4?) and an anode (3, 3?), wherein the cathode (4, 4?) features a cathode feed line (40), the anode (3, 3?) features an anode feed line (30), and the flow in the anode (3, 3?) is connected with the flow in the fuel supply unit (8) via the anode feed line (30), in which a reforming apparatus (13) is arranged, and having an anode exhaust line (6) provided with at least one burner apparatus (22, 23).

Abstract: The present invention concerns a starting burner (100a; 100b) for a fuel cell system (1000a; 1000b), having a catalyst (10) with a catalyst inlet (11) and a catalyst outlet (12), a catalyst area (13) being formed between the catalyst inlet (11) and the catalyst outlet (12), and the catalyst area (13) being surrounded by a catalyst wall (14) in a passage direction (D) from the catalyst inlet (11) to the catalyst outlet (12), and an operating fluid guide section (20) for supplying an operating fluid (F1) to the catalyst inlet (11), wherein the operating fluid guide section (20) is arranged outside the catalyst (10) at least in sections along the catalyst wall (14). The invention also concerns a fuel cell system (1000) with the starting burner (100a; 100b) and a method for heating a service fluid (F1) in the fuel cell system (1000a; 1000b).

Abstract: To make the handling of a tire model for controlling a test run on a test bench simpler and more flexible and thus more practicable, it is provided that at least one longitudinal velocity of a tire is calculated in a first simulation unit with a first simulation model, and the longitudinal velocity is provided to a second simulation unit, and a longitudinal force and/or a rolling resistance torque of the tire are calculated with a second simulation model in the second simulation unit on the basis of the longitudinal velocity, and said longitudinal force and/or rolling resistance torque are used to calculate at least one target dyno value for a drive control unit of a load machine of the test bench.

Abstract: The invention relates to a reciprocating piston engine, in particular an internal combustion engine, comprising at least one length adjustable connecting rod (1) connected to a crankshaft (26), which connecting rod (1) comprises at least one first rod part (2) having a small connecting-rod eye (3) and at least one second rod part (4) having a large connecting-rod eye (5), which two rod parts (2, 4) can be displaced telescopically with respect to and/or into each other by means of a length adjustment device (100), wherein the length adjustment device (100) can be fluidically connected in at least one position of a control valve (15) to at least one oil pressure line (14, 6), and can be separated from the oil pressure line (16) in at least one second position of the control valve (15), wherein the control valve (15) can be electrically switched and inductively actuated.

Abstract: An electronics unit for a flow meter which includes a housing. The electronics unit includes a motherboard which controls the flow meter, at least one additional circuit board with additional electronic components, an electric plug connection arranged between the motherboard and the at least one additional circuit board, a connection box in which the at least one additional circuit board is fastened, and an electrical plug connection which connects the at least one additional circuit board to the motherboard in an electrically detachable manner. The motherboard is secured in the housing of the flow meter. The connection box is mechanically secured to the housing of the flow meter in a detachable manner.

Abstract: For the determination of a non-linear controller for a non-linear system it is proposed that a parameter set (KPID(k)) of the controller (1) is determined by means of an optimization using a multi-criteria evolutionary algorithm, in which algorithm a plurality of parameter sets (KPID(k)), which each represent a possible solution of the optimization, are determined in each evolution step and at least two quality values (fi) are determined for each parameter set (KPID(k)) and the quality values (fi) are optimized by the multi-criteria evolutionary algorithm.

Abstract: In order to be able to test an assembly of components of a vehicle on a test stand with improved dynamics, it is provided to calculate, in a simulation unit (20) using a simulation model (21) for the at least one component of the assembly, the instantaneous drive train rotary speed (nP) of this component from a drive train torque (TP) acting in the drive train (2) and the braking effect (B) of the braking system (11), and the calculated instantaneous drive train rotary speed (nP) is used by the vehicle control device (14) for calculating the at least one component, and the calculated drive train rotary speed (nP) is used by a drive controller (23) for controlling the load machine (8).

Abstract: The invention relates to a method for simulation-based analysis and/or optimization of a motor vehicle, preferably having the following working steps: simulating (SIOI) a driving operation of the motor vehicle (I) on the basis of a model (M) with at least one manipulated variable for acquiring values of at least one simulated variable which is suitable for characterizing an overall vehicle behaviour, in particular a driving capability, of the motor vehicle (I), wherein the model has at least one partial model, in particular a torque model, and wherein the at least one partial model is based on a function and preferably characterizes the operation of at least one component, in particular of an internal combustion engine of the motor vehicle (I); and—outputting (S I03) the values of the at least one simulated variable.

Abstract: A method for modifying a driving simulator is disclosed. During at least one time segment of an actual drive, a chronological profile of a biometric state of the athlete is determined, a chronological profile of a parameter of a vehicle used by the athlete is determined, and a relationship is determined between the chronological profile of the biometric state and parameter of the vehicle. During a first training in the driving simulator a developing chronological training profile of the biometric state of the athlete is determined, and during a further, second training in the driving simulator, the chronological training profile of the biometric state of the athlete, modified by mental stimulation of the athlete according to the determined relationship, is made to approximate the chronological profile of the biometric state of the athlete in the actual drive.

Abstract: A device for detecting signal pulses in an analog measurement signal of a particle counter is disclosed. The device includes an AD converter and an evaluation unit, wherein the evaluation unit includes a slope evaluation unit, which determines signal pulses by evaluating the pulses between adjacent samples in the digital data stream of the AD converter in real time.

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.