Abstract: An open-centered large rolling bearing having two concentric bearing rings, which are supported against one another in the axial direction of the rolling bearing by means of at least two axial bearings, which are arranged on opposite end faces of a bearing ring. In the radial direction, the bearing rings are supported against one another by at least three radial bearings, which are arranged on inner and outer circumferential sides of a bearing ring.

Abstract: A motor vehicle is provided) with at least one fuel cell and a device for preparing a beverage, which has a steam and/or liquid dispenser for dispensing a liquid into a vessel. A supply line is provided between the at least one fuel cell and the steam and/or liquid dispenser for supplying product water generated in the at least one fuel cell to the steam and/or liquid dispenser. A method for preparing a beverage is also provided.

Abstract: A multi-row rolling bearing having an inner ring and an outer ring and at least two axial rolling bearing rows for supporting axial forces between the inner and outer ring, wherein the two axial rolling bearing rows are seated on opposite axial sides of a radially projecting annular lug which engages in an annular groove and which is supported by means of said axial rolling bearing rows against the annular groove. According to the invention, at least one of the axial rolling bearing rows is formed as an angular-contact roller bearing with an angle of inclination of greater than 0° to at most 45°.

Abstract: A method for operating a fuel cell system comprising a control unit and at least one fuel cell comprises a cycle of the following steps: recording of an actual U/I characteristic curve of the fuel cell, comparison of the recorded actual U/I characteristic curve of the fuel cell with a target U/I characteristic curve stored in a memory, at least within a predetermined or pre-determinable current range, and determination of the difference between the target U/I characteristic curve and the actual U/I characteristic curve within the current range, comprising the following steps: continuous or clocked repetition of the cycle until the difference reaches or exceeds a predetermined or pre-determinable difference limit value, and adjustment of at least one parameter of the control unit to reduce or minimize the difference.

Abstract: The disclosure relates to a method for increasing a temperature of a vehicle interior of a vehicle from a low temperature value to an increased temperature value, wherein the vehicle has a fuel cell system with a fuel cell stack and a compressor connected with the fuel cell stack at the cathode side, comprising: drawing in cathode gas via the compressor, and compressing and heating the drawn-in cathode gas. At least a portion of a cathode gas mass flow of the heated cathode gas is directed into the vehicle interior, and the temperature of the vehicle interior is raised to the increased temperature value. Moreover, the disclosure relates to a vehicle for implementing the method.

Abstract: The invention relates to a method for transmitting data between a first unit which accumulates data that has been generated with a first frequency and a second unit which requests the accumulated data with a second frequency. The method has the steps of requesting a first total increment and a first value, which represents a time increment belonging to the first total increment, from the first unit, said first total increment being the data content of the accumulated data block provided at the request time in the first unit; generating a second total increment from the first total increment using the first value, the second total increment being the data content of a data block adapted to a nominal time increment of the second frequency; and transmitting the second total increment to the second unit.

Abstract: The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas.

Abstract: A precipitated silica having an SiOHisolated absorbance ratio of greater than or equal to 1.5, a silanol group density of 1 to 3.0 SiOH/nm2, a modified tapped density of 1 to 50 g/l, and a pH of 3-5, when measured as a aqueous suspension of 5.00 g of the precipitated silica in 100 ml. of deionized water allows preparation of storage-stable RTV-1 silicone rubber formulations without stabilizer. A process for preparing the precipitated silica and its use in thickening sealants is provided.

Abstract: It has been found that conventional cheap waterglass qualities in a strongly acidic medium react to give high-purity silica grades, the treatment of which with a base leads to products which can be processed further to give glass bodies with low silanol group contents.

Abstract: A control device comprises a sensor unit, which outputs a measurement signal, which reflects a deviation of an oscillator along a direction of excitation. A controller main unit derives a control signal for an actuator unit from the measurement signal and a harmonic set point signal such that the actuator unit counteracts a deviation of the deflection of the oscillator from a set amplitude of a harmonic resonance oscillation. A controller extension unit estimates actual-phase and actual-amplitude of a residual oscillation of the oscillator and synchronizes the harmonic set point signal with the residual oscillation at a deactivated actuator unit. The residual energy contained in the residual oscillation is used, in order to arrive faster at a defined operation state of the oscillator.

Abstract: The invention relates to a method for transmitting data between a first unit which accumulates data that has been generated with a first frequency and a second unit which requests the accumulated data with a second frequency. The method has the steps of requesting a first total increment and a first value, which represents a time increment belonging to the first total increment, from the first unit, said first total increment being the data content of the accumulated data block provided at the request time in the first unit; generating a second total increment from the first total increment using the first value, the second total increment being the data content of a data block adapted to a nominal time increment of the second frequency; and transmitting the second total increment to the second unit.

Abstract: The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas.

Abstract: A controller unit includes a PI-controller for harmonic command variables. The transfer function of the PI-controller has a conjugate complex pole at a controller angular frequency ?r in the s-plane or a pole at e±j?rT in the z-plane, wherein T is the sampling time of a discrete input signal of the PI-controller and ?r is larger than 0. The controller angular frequency ?r is chosen equal to the resonance angular frequency ?0 of an oscillator. The controller parameters, are, for example determined by pole/zero compensation. The controller unit allows, for example, a broad band control of harmonic oscillators in rotation rate sensors.

Abstract: A control device comprises a sensor unit (170), which outputs a measurement signal, which reflects a deviation of an oscillator (190) along a direction of excitation. A controller main unit (200) deduces from the measurement signal and a harmonic set point signal a control signal for an actuator unit such that the actuator unit (180) counteracts a deviation of the deflection of the oscillator (190) from a set amplitude of a harmonic resonance oscillation. A controller extension unit (600) estimates at deactivated actuator unit (180) actual-phase and actual-amplitude of a residual oscillation of the oscillator (190) and synchronizes the harmonic set point signal with the residual oscillation. The residual energy contained in the residual oscillation is used, in order to arrive faster at a defined operation state of the oscillator.

Abstract: A controller unit includes a PI-controller for harmonic command variables. The transfer function of the PI-controller has a conjugate complex pole at a controller angular frequency ?r in the s-plane or a pole at e±j?rT in the z-plane, wherein T is the sampling time of a discrete input signal of the PI-controller and ?r is larger than 0. The controller angular frequency ?r is chosen equal to the resonance angular frequency ?0 of an oscillator. The controller parameters, are, for example determined by pole/zero compensation. The controller unit allows, for example, a broad band control of harmonic oscillators in rotation rate sensors.

Abstract: The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas.

Abstract: It has been found that conventional cheap waterglass qualities in a strongly acidic medium react to give high-purity silica grades, the treatment of which with a base leads to products which can be processed further to give glass bodies with low silanol group contents.

Abstract: Hydrophilic precipitated silicas which combine a particularly low initial moisture content with low moisture absorption over time, a low tapped density and a low silanol group density, have the following physicochemical parameters: equilibrium moisture content (at 70% relative humidity/20° C.) of 0.5%-5.0% by weight, based on the weight of the hydrophilic precipitated silica, BET surface area of 50-250 m2/g, CTAB surface area of 50-250 m2/g, and DBP (anhydrous) of 200-350 g/100 g.

Abstract: The invention relates to stabilized dispersions of precipitated silicon dioxide, to a process for production thereof and to the use thereof, especially for production of paper coatings for glossy photo paper for inkjet printing.

Abstract: The present invention relates to suspensions which have a very low salt content and contain at least one precipitated silica, a process for producing them and also their use.