Abstract: In a motor vehicle drive train device with a drive engine and a drive train which has a first coupling unit in the form of a clutch arranged close to the drive engine and at least one second coupling unit arranged in the flow of force from the drive engine close to the drive wheels of the vehicle, a control unit is provided which controls the coupling units and which has an overrun operating mode wherein, at a first point, the drive engine can be disconnected from the drive train by opening the clutch and, at a second point, the coupling units close to the drive wheels can be disengaged so as to disconnect the drive train also from the drive wheels.

Abstract: The disclosure relates to a method for operating a DC/DC voltage converter comprising a first switching bridge with at least two first switches coupled to an input of the DC/DC voltage converter, a second switching bridge with at least two second switches coupled to an output of the DC/DC voltage converter, a transformer and at least one capacitor, wherein the first switching bridge is connected to the second switching bridge via the transformer. The first switches are switched such that a resonant circuit formed by the transformer and the at least one capacitor is operated in resonance, and the second switches are switched at the same clock frequency with a phase shift compared to the first switches, such that the second switches are switched prior to the first switches. The disclosure also relates to a DC/DC voltage converter comprising a control circuit for the first and second switches which is configured to carry out the method, and to a backup power system including such a DC/DC voltage converter.

Abstract: A method for operating a cold start emission control of an internal combustion engine, a combustion chamber pressure in at least one cylinder of the internal combustion engine being initially detected, at least one characteristic variable for a combustion process of the internal combustion engine being determined based on the detected combustion chamber pressure, a setpoint value being established for the characteristic variable, a deviation of the characteristic variable from the setpoint value being determined, and an error entry being generated as a function of the determined deviation.

Abstract: A drive train control arrangement for a motor vehicle drive train includes a main drive train, a first drive axle permanently driven by the main drive train, an auxiliary drive train and a second drive axle coupleable to the main drive train via the auxiliary drive train, which has a first clutch unit and a second clutch unit connected downstream in the power train of the first clutch unit for connecting the second drive axle to the main drive train, and a control unit, which in at least one operating mode that closes the at least one second clutch unit of the auxiliary drive train to shift into a standby operating mode when a defined operating condition is present, and with the standby operating mode activated, closes the first clutch unit of the auxiliary drive train to connect the coupleable second drive axle depending on at least one parameter.

Abstract: In a method for determining a filling difference between at least two cylinders of an internal combustion engine, e.g., an Otto-cycle engine, a power output parameter contribution made available by the respective cylinder to a total power output parameter of the internal combustion engine is ascertained for each of the at least two cylinders for different fuel quantities, and an air inhomogeneity between the at least two cylinders is ascertained on the basis of the power output parameter contributions, ascertained for the different fuel quantities, of the at least two cylinders.

Abstract: In a method for operating an internal combustion engine, a measured NOx actual value is compared to an NOx setpoint value, and an exhaust gas recirculation is controlled as a function of a deviation of the NOx actual value from the NOx setpoint value. Respective portions of internally recirculated exhaust gases and externally recirculated exhaust gases of a total of recirculated exhaust gases are adjusted for controlling the exhaust gas recirculation.

Abstract: A method for setting an exhaust gas recirculation rate in an engine system having an internal combustion engine, the exhaust gas recirculation rate indicating the portion of the exhaust gas recirculated into one cylinder of the internal combustion engine with regard to the total gas quantity present in the cylinder, including: operating the internal combustion engine according to an input for the exhaust gas recirculation rate, an ignition of an air/fuel mixture being carried out in the cylinder at a certain ignition timing; adjusting the ignition timing in the cylinder of the internal combustion engine; correcting the input for the exhaust gas recirculation rate as a function of a change in an operating behavior of the internal combustion engine due to the ignition timing adjustment.

Abstract: A device for converting direct voltage from an electrochemical store or a fuel cell to alternating voltage, includes a two-stage design having a single DC/DC converter stage for generating an intermediate circuit voltage from the output voltage of the electrochemical store or the fuel cell, which converter stage converts, in particular raises, the direct voltage in a wide input voltage range directly to an intermediate circuit voltage with which a DC/AC converter stage can be operated to generate the alternating voltage. The single DC/AC converter stage generates the alternating voltage from the intermediate circuit voltage. The invention further relates to a method for actuating a device for converting direct voltage from a store or energy generator into alternating voltage for feeding into a supply network.

Abstract: The present invention relates to a method for the reliable and reproducible preparation of 4-[17?-methoxy-17?-methoxymethyl-3-oxoestra-4,9-dien-11?-yl]benzaldehyde (E)-oxime (asoprisnil) on the pilot and manufacturing scale. Asoprisnil, which is prepared by this method, is distinguished by a very good physical stability and is therefore particularly suitable for the manufacture of solid pharmaceutical forms (tablets, coated tablets, etc.).

Abstract: The invention comprises a reflector with a fastening device for an animal collar. The reflector includes a base plate with an inner surface and an outer surface. A clip, which is substantially U-shaped, runs over the inner surface, the end of the first leg of the clip being fastened by means of a movable connection to a first side of the base plate, and the end of the second leg being suitable for being irreversibly fastened to a side of the base plate opposite from the first side. On the outer surface of the base plate there are triple prisms. On the inner surface of the base plate there is/are one or more spacers. The invention also comprises a collar containing an active substance which can leave the collar over the entire length. At least one of the reflectors according to the invention is fastened to the collar.

Abstract: A vehicle includes at least one of (i) an undercarriage and an upper carriage arranged rotatably about a vertical axis with respect to the undercarriage and (ii) a leverage means arranged pivotably about a horizontal axis with respect to the upper carriage, wherein a sensor system is provided for monitoring at least one stability criterion with respect of a tilt movement of the vehicle, and wherein a control unit is coupled to the sensor system for automatically initiating an action and/or performing an action for stabilizing the vehicle depending on the at least one stability criterion.

Abstract: Disclosed are a method and a device for diagnosing a catalytic converter located in a exhaust gas flow. Said method and device are based on an evaluation of the hygroscopic properties of the catalytic converter.

Abstract: The present invention relates to a method for the reliable and reproducible preparation of 4-[17?-methoxy-17?-methoxymethyl-3-oxoestra-4,9-dien-11?-yl]benzaldehyde (E)-oxime (asoprisnil) on the pilot and manufacturing scale. Asoprisnil, which is prepared by this method, is distinguished by a very good physical stability and is therefore particularly suitable for the manufacture of solid pharmaceutical forms (tablets, coated tablets, etc.).

Abstract: The invention relates to an apparatus for purifying liquids, in particular for purifying ballast water.

Abstract: The invention relates to a method for reducing uncontrolled combustions in an internal combustion engine, which occur independently of the ignition by a spark plug, wherein uncontrolled combustions are detected in the internal combustion engine (1). In order to reduce the damaging effects of the uncontrolled combustions to the internal combustion engine, the incipient uncontrolled combustion (B) is reduced after said incipient uncontrolled combustion (B) has been detected.

Abstract: The invention relates to a method and an apparatus for determining an exhaust gas recirculation rate in an internal combustion engine, in which the exhaust gas recirculation rate indicates a proportion of exhaust gas in a gas quantity delivered to a cylinder of the internal combustion engine, and combustion takes place in the cylinder of the engine cyclically during a combustion phase. The method includes the steps of ascertaining a combustion course statement over the course of combustion in the cylinder of the engine, and ascertaining an actual exhaust gas recirculation rate from the combustion course statement with the aid of a predetermined exhaust gas recirculation rate function.