Abstract: A computer-implemented method is provided for storing process data. The method comprises allocating a storage area for the process data in the storage means, loading the process data, from the at least one source system, and storing the process steps according to a predetermined data structure in the allocated storage area of the storage means. The predetermined data structure comprises a first attribute, in which a unique identification of the process instance of the respective process step is stored, a second attribute, in which an identification of the respective process step is stored, and a third attribute, in which the sequence of the process steps within a process instance is stored. The method then sorts the process steps in the allocated storage area, wherein the process steps are first sorted according to the first attribute, and subsequently, according to the third attribute.

Abstract: A computer-implemented method is provided for determining parallel process paths in process data. In a first step, a status hierarchy is generated from process steps stored in a storage means, wherein the process steps are read from the storage means and are added to the status hierarchy, and wherein for each added process step, a predecessor/successor relation is added to at least one further process step to the status hierarchy. In a second step, a process hierarchy of the process instance comprising nodes and edges is deduced from the process steps stored in the status hierarchy and the respective predecessor and/or successor relations.

Abstract: A computer-implemented method is provided for determining a net throughput time between process steps of a process instance, wherein a processor is used for determining the net throughput time of the process instance in a calendar, in which a number of time intervals is stored, which are to be considered for the determination of the net throughput times, and the processor performs a matching procedure between the time specifications stored for the process steps and the time intervals stored in the calendar, wherein subsequently to the matching procedure, a net throughput time between two process steps is calculated.

Abstract: A computer-implemented method is provided for analysis of process data. The method comprises receiving an APE statement (Advanced Process Algebra Execution), wherein the APE statement defines a query of process instances from the storage means, and wherein the APE statement comprises at least one process operator, and executing the APE statement and reading the process instances according to the APE statement from the storage means, and providing the result of the query for further processing.

Abstract: The invention relates to a system (1) for venting a fuel tank (3). The system (1) has a gas vessel (9), a first line (11), and a second line (13). The gas vessel (9) is designed to receive fuel vapor (7) from the fuel tank (3). The first line (11) connects the gas vessel (9) to an air supply path (21) of an internal combustion engine (19). The second line (13) connects the gas vessel (9) to a fuel supply path (30) of the internal combustion engine (19).

Abstract: A method for operating an internal combustion engine in which combustion air is supplied to a combustion chamber of the internal combustion engine, which air is compressed with the aid of a pulse supercharger, the pulse supercharger being controlled in such a way that optionally, in a first operating mode, the combustion air is compressed in order to support a compressor of a turbocharger, or in a second operating mode, the combustion air compressed with the aid of the compressor is cooled.

Abstract: A method for operating an internal combustion engine in which combustion air is supplied to a combustion chamber of the internal combustion engine, which air is compressed with the aid of a pulse supercharger, the pulse supercharger being controlled in such a way that optionally, in a first operating mode, the combustion air is compressed in order to support a compressor of a turbocharger, or in a second operating mode, the combustion air compressed with the aid of the compressor is cooled.

Abstract: A method for diagnosing an internal combustion engine including at least one microphone associated with the internal combustion engine, the sound of the internal combustion engine being recorded and converted into an electrical signal. The electrical signal representing the sound is used for the diagnosis of the operating state of the internal combustion engine.

Abstract: A method and an arrangement for detecting the end of a start operation in an internal combustion engine (1) of a motor vehicle make it possible to distinguish the start operation from a steady-state condition of the engine (1) even for starters having a high starter rpm. At least one operating variable of the engine is determined which is different from the rpm thereof. The at least one operating variable is compared to a pregiven threshold value. The end of the start operation is detected when the at least one operating variable reaches or exceeds the threshold value.

Abstract: A method for operating an internal combustion engine is provided, such as, for example, in a motor vehicle, in which at least two different fuels are simultaneously supplied to at least one combustion chamber of the internal combustion engine.

Abstract: A fuel cell system has a combustion device, a fuel cell unit and a reformer for transforming fuel into a reformed gas, the combustion device having at least one exhaust pipe as an outlet for exhaust gas, the use of such a fuel cell system resulting in a marked reduction in the additional energy that may be required for heating the transforming unit. This is achieved by positioning at least one heat exchanger unit at the exhaust pipe for heating a heating fluid and/or a fuel of the reformer, using the heat from the exhaust gas stream.

Abstract: A method for operating an internal combustion engine is provided, such as, for example, in a motor vehicle, in which at least two different fuels are simultaneously supplied to at least one combustion chamber of the internal combustion engine.

Abstract: A method and an arrangement for detecting the end of a start operation in an internal combustion engine (1) of a motor vehicle make it possible to distinguish the start operation from a steady-state condition of the engine (1) even for starters having a high starter rpm. At least one operating variable of the engine is determined which is different from the rpm thereof. The at least one operating variable is compared to a pregiven threshold value. The end of the start operation is detected when the at least one operating variable reaches or exceeds the threshold value.

Abstract: The device for determining load in internal combustion engines includes a pressure sensor connected with a combustion chamber of an internal combustion engine which produces an output signal depending on a combustion chamber pressure, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and a processor for determining a load of the engine from relative values of the output signal of the pressure sensor at predetermined crankshaft angles. The processor includes a device for determining the load from a pressure difference between combustion chamber pressures measured at two different predetermined crankshaft angles (x1, x2) or from two integrated pressure values. The integrated relative pressure values are obtained by integration of a pressure-proportional output signal of the pressure sensor between two different predetermined crankshaft angles.

Abstract: The invention is directed to a method for high-resolution rpm detection in a multicylinder internal combustion engine having a crankshaft. Segment times (ts) are detected in which the crankshaft of the engine passes through predetermined angular regions. First corrective values are formed during overrun operation and logically coupled to the segment times (ts) so that deviations of the segment times (ts) of different segments are compensated in the overrun operation. Second corrective values outside of the overrun operation are determined on the basis of the corrected segment times and logically coupled to at least one of the corrected segment times and further processed segment times so that the deviations of the corrected segment times or the further processed segment times are compensated with each other during misfire-free operation.

Abstract: Process for controlling the warm-up in an internal combustion engine wherein the combustion chamber pressure is obtained and evaluated, so that, using the evaluation of the combustion chamber pressure signal, the combustion is controlled so that combustion is not completed at the time the exhaust valve opens during warm-up.

Abstract: A method and an arrangement for controlling an internal combustion engine is suggested wherein, in at least a first operating range, a lean air/fuel mixture are pregiven and, for a power command from the driver (for example, in transient operating states or in the vicinity of the full load range) a switchover to a stoichiometric mixture takes place; during the transition, the torque change (caused by the change of the air/fuel ratio) is essentially compensated by correspondingly influencing the air supply to the engine.

Abstract: In a process for controlling the warm-up in an internal combustion engine, the combustion chamber pressure is evaluated, so that the warm-up period is divided into first and second phases that are controlled differently.

Abstract: A transmitter wheel is used for example to detect speed changes of an internal combustion engine with high precision in order to calculate a running imbalance value from them. A transmitter wheel of this kind has for example three segments, which are ideally the same length, but in reality usually have lengths which differ slightly from one another. In order to prevent measurement errors which are caused by this, it is known to determine the actual lengths by means of an adaption process. The device according to the invention is embodied such that for each segment, it has a plurality of adaption filters to detect different adaption values for different speed ranges. It has namely turned out that in different speed ranges, different lengths are measured, which is an error that must be compensated for since the length of a segment is in fact actually constant.

Abstract: In a method and device for monitoring a secondary-air system, a first value is determined which characterizes the secondary air stream blown by the secondary-air system into the exhaust-gas channel of an internal combustion engine. On the basis of this first value, the functioning of the secondary-air system is judged. If the first value lies within a predeterminable interval, it is concluded that the secondary-air system is operating properly. If the first value, on the other hand, lies outside of this predeterminable interval, it is concluded that a malfunction is present. The first value is determined from a second value which characterizes the stream of air fed to the internal combustion engine, from the air/fuel ratio of the mixture drawn in by the internal combustion engine, and from the air/fuel ratio prevailing in the exhaust-gas channel downstream of the place of introduction of the secondary-air line.