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| 20100136454 | FUEL CIRCUIT OF A FUEL CELL SYSTEM - A fuel cell circuit of a fuel cell system includes a fuel cell unit having an input on the anode side for feeding fuel from a storage tank to the fuel cell unit, and an output on the anode side for discharging fuel cell waste gas on the anode side from the fuel cell unit. A recirculation circuit is provided, to return the fuel cell waste gas on the anode side to the input on the anode side. The recirculation circuit is connected to an intake line of an ejector unit, and fuel can be fed from the storage tank directly into the recirculation circuit. | 06-03-2010 |
| 20100143810 | Fuel Cell System and Method of Operating the Same - A method of operating a fuel cell system with at least one fuel cell unit comprising a plurality of fuel cells, each having one anode and one cathode, the anode adjoining an anode gas compartment and the cathode adjoining a cathode gas compartment, hydrogen being supplied to the anode and an oxidizing agent being supplied to the cathode. Hydrogen is supplied to the anode compartment during a retention time before start-up of the fuel cell system, in which no fuel cell reaction takes place in the fuel cell unit. Hydrogen is stored in an adsorption storage element during fuel cell operation and released to the anode compartment during the retention time. | 06-10-2010 |
| 20100255388 | Fuel Cell System and Method of Operating a Fuel Cell System - In a fuel cell system a specific connection and a valve arrangement make it possible for a compressor to supply precompressed air to a fuel cell stack via a waste gas line, said air then leaving the fuel cell stack via a line which is otherwise an air feed line. In this way, a humidifier may be bypassed. This is sensible in particular during a start phase at low ambient temperatures, during which the fuel cell system is intended to warm up without moisture in the fuel cell stack having a negative effect, for instance by freezing. The compressor may be operated both in the start phase or stop phase and during conventional operation by the same mode of operation. | 10-07-2010 |
| 20110045367 | Fuel Cell Supply System, Fuel Cell System and Method of Operating the Same - A fuel cell supply system | 02-24-2011 |
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| 20110194807 | OPTICAL SENSOR - An optical sensor for detecting a substance includes a first waveguide and a second waveguide optically coupled via a directional coupler to the first waveguide. The sensor has a functional surface in a region of the directional coupler for accumulating or storing the substance to be detected so that an intensity of a coupling arranged by the directional coupler between the first waveguide and the second waveguide can be changed by the accumulating or storing of this substance. The first waveguide extends in a freely floating manner over a coupling path covered by the directional coupler or rests on a swellable material. The first waveguide is guided in a vicinity of the coupling path so that a spacing between the first waveguide and the second waveguide can be changed there by a deformation or movement of the first waveguide or of a carrier of the first waveguide. | 08-11-2011 |
| 20110290002 | PHOTOACOUSTIC GAS SENSOR AND ITS USE - The invention relates to a gas sensor having a mechanical microresonator, which has an excitation apparatus for optically exciting a mechanical oscillation of the microresonator as well as a reading apparatus for detecting the oscillation of the microresonator, wherein the reading apparatus comprises a waveguide which is implemented together with the microresonator on a dielectric or semiconducting substrate and is intended to optically read the oscillation of the microresonator, and wherein the excitation apparatus has an optical waveguide which is implemented on the same substrate and optically connects an excitation light source to the immediate surroundings of the microresonator. The invention also relates to a use of such a sensor to analyse a gas composition. | 12-01-2011 |
| 20110305413 | OPTICAL MODULATOR, INTEGRATED OPTICAL CIRCUIT, AND METHOD FOR MODULATING AN OPTICAL SIGNAL - The invention relates to an optical modulator, comprising a first waveguide for a signal to be modulated, a second waveguide for a control signal, and an auxiliary waveguide, wherein the auxiliary waveguide is supported by a carrier which can be deflected to change a distance between the first waveguide and the auxiliary waveguide, wherein the carrier also comprises two layers with different coefficients of thermal expansion and the second waveguide is guided in such a way that a temperature of the carrier at least in a section can be manipulated by light transported by the second waveguide. The invention further relates to an integrated optical circuit comprising such an optical modulator, and to a modulation method which can be performed with such a modulator. | 12-15-2011 |
| 20120057173 | SENSOR ARRANGEMENT AND DETECTION METHOD - The invention relates to an optical sensor arrangement comprising a measuring optical fiber demonstrating birefringence modifiable as a function of a measurement variable, and to an optical analysis unit having two optical branches implemented as optical fibers forming a Mach-Zehnder interferometer and an optical coupler for bringing together light guided in the two branches, wherein at least one output of the coupler is optically connected to at least one light-sensitive element, and wherein the analysis unit comprises a polarizing beam splitter from which the optical branches originate, wherein the measurement optical fiber is connected upstream of an optical input of the polarizing beam splitter, and wherein a polarization converter is disposed in a course of one of the optical branches. The invention further relates to a detection method that can be performed using said sensor arrangement. | 03-08-2012 |
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| 20100045128 | DIRECT CURRENT MACHINE - The invention relates to a DC current machine, in particular a DC current motor for driving a blower of a motor vehicle, with a pole housing forming the stator of the machine, a rotor that is rotatably mounted in two bearing plates, and with a brush support for supplying current to the rotor. According to the invention, a support is integrated into the brush support, with de-tensioning for the electrical connecting cables of the machine, which means that a secure fastening, de-tensioning, and insulation of the connecting cables is achieved without additional components and without additional expense in the assembly of the machine. | 02-25-2010 |
| 20110227442 | ELECTRIC MACHINE - The invention relates to a synchronous machine with hybrid energisation, in particular a generator for supplying the electrical system of a motor vehicle, comprising a laminated stator ( | 09-22-2011 |
| 20110304233 | ELECTRIC MACHINE HAVING A ROTOR - The invention relates to an electric machine, particularly a transversal flux machine, comprising a rotor ( | 12-15-2011 |
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| 20100263952 | Method and device for operating a hybrid drive - A method for operating a hybrid vehicle, which has a first and a second drive unit, in which the second drive unit is started by at least a portion of the operating energy generated by the first drive unit. In order to improve the driving comfort of the hybrid vehicle during the startup of the second drive unit while driving, the second drive unit, which is at rest, is started using kinetic energy obtained from a driving movement of the hybrid vehicle, while the hybrid vehicle is driven by the first drive unit. | 10-21-2010 |
| 20110320080 | METHOD FOR OPERATING A VEHICLE ELECTRICAL SYSTEM HAVING AT LEAST TWO ONBOARD SUBSYSTEMS - A method for operating a vehicle electrical system of a motor vehicle, the vehicle electrical system having at least two onboard subsystems having different electrical voltages, and a coupling is provided which allows a flow of electrical energy between the onboard subsystems, the one onboard subsystem being connected to a generator and/or at least one electrical consumer, and the other onboard subsystem being connected to at least one electrical consumer. In the event of a fault, the voltage supplied by the generator is lowered to a value that poses no risk to persons, yet an energy flow from the onboard subsystem having the generator to the other onboard subsystem having the consumer taking place nevertheless. | 12-29-2011 |
