Abstract: An electronic circuit arrangement for a fuel cell arrangement may include a first electrical voltage converter stage and a second electrical voltage converter stage. An electrical fuel cell voltage may be appliable to the first electrical voltage converter stage on an input side. The electrical fuel cell voltage may be convertible into a first electrical output voltage of the first electrical voltage converter stage via the first electrical voltage converter stage. The first electrical output voltage may be appliable to the second electrical voltage converter stage on an input side. The first electrical output voltage may be convertible into a second electrical output voltage of the second electrical voltage converter stage via the second electrical voltage converter stage. An electrical interconnection of the first electrical voltage converter stage and the second electrical voltage converter stage may be switchable between a first interconnection state and a second interconnection state.

Abstract: A method for determining a temperature of an Insulated-Gate Bipolar Transistor (“IGBT”) driver, the IGBT driver may include two Metal-Oxide-Semiconductor Field-Effect Transistor (“MOSFET”) elements, two direct voltage terminals for providing a base direct voltage for the two MOSFET elements, two gate terminals for providing two control voltages for the two MOSFET elements, a measurement output for outputting an output voltage, and an alternating voltage source for providing an alternating voltage, the method may include providing the control voltages, the base direct voltage, and the alternating voltage, superimposing the alternating voltage with the base direct voltage, capturing the output voltage at the measurement output of the IGBT driver, and determining the temperature of the respective MOSFET elements from the captured output voltage.

Abstract: A traction battery of a motor vehicle is disclosed. The traction battery includes a housing having a housing pot and a lid closing the housing pot. A plurality of components to be cooled are arranged in the housing. A cooling device having at least one cooling channel is arranged within the housing and connected to the components to be cooled in a heat-transferring manner. At least one insert is provided. The components to be cooled lie against the at least one insert in a heat-transferring manner.

Abstract: An electronic circuit arrangement for a fuel cell arrangement may include a first electrical voltage converter stage and a second electrical voltage converter stage. An electrical fuel cell voltage may be appliable to the first electrical voltage converter stage on an input side. The electrical fuel cell voltage may be convertible into a first electrical output voltage of the first electrical voltage converter stage via the first electrical voltage converter stage. The first electrical output voltage may be appliable to the second electrical voltage converter stage on an input side. The first electrical output voltage may be convertible into a second electrical output voltage of the second electrical voltage converter stage via the second electrical voltage converter stage. An electrical interconnection of the first electrical voltage converter stage and the second electrical voltage converter stage may be switchable between a first interconnection state and a second interconnection state.

Abstract: A method for controlling a pressure in a crankcase of an internal combustion engine with a crankcase venting device. The crankcase venting device may include a suction line via which a blow-by gas is removable from the crankcase, a pumping device, and an oil mist separating device. The pumping device and the oil mist separating device may be arranged in the suction line. The method may include controlling a rotational speed of an electric drive in at least one of a closed-loop manner and an open-loop manner, the electric drive configured to drive the pumping device. The method may also include adjusting the pressure in the crankcase via manipulating the rotational speed of the electric drive. The method may further include inferring the pressure in the crankcase via evaluating at least one performance parameter of the electric drive.

Abstract: A method for controlling a pressure in a crankcase of an internal combustion engine with a crankcase venting device. The crankcase venting device may include a suction line via which a blow-by gas is removable from the crankcase, a pumping device, and an oil mist separating device. The pumping device and the oil mist separating device may be arranged in the suction line. The method may include controlling a rotational speed of an electric drive in at least one of a closed-loop manner and an open-loop manner, the electric drive configured to drive the pumping device. The method may also include adjusting the pressure in the crankcase via manipulating the rotational speed of the electric drive. The method may further include inferring the pressure in the crankcase via evaluating at least one performance parameter of the electric drive.

Abstract: A liquid mist separation device for separating liquid from a gas flow may include a nozzle plate including at least one nozzle which is open at least in part and at least one baffle plate. The device may also include at least one valve element which, together with the nozzle plate, forms at least one variable nozzle. The at least one variable nozzle may be arranged fluidically parallel to the at least one nozzle. The nozzle plate and the at least one valve element may be arranged axially displaceable relative to each other. The nozzle plate and the at least one baffle plate may be disposed at a fixed distance with respect to one another. Opposite the at least one nozzle and the at least one variable nozzle a baffle plate may be arranged, which deflects the gas flow emerging from the respective nozzle and on which liquid droplets precipitate.

Abstract: A pump device may include a side channel compressor that may include a housing having a conveying chamber and a fluid inlet and outlet. The compressor may include an impeller having blades radially on an outside and which may be mounted rotatably in the housing, the blades lying in the conveying chamber, and a shaft mounted rotatably about an axis of rotation and on which the impeller may be fastened. The conveying chamber may have at least one side channel running in a region of the blades and connecting the fluid inlet and outlet to one another in a circumferential direction. An intermediate region may be formed in the circumferential direction between the fluid inlet and outlet and in which a distance of the blades in an axial direction to the nearest wall may be such that no more than a predetermined amount of fluid flows in the intermediate region.

Abstract: A liquid mist separation device for separating liquid from a gas flow may include a nozzle plate including at least one nozzle which is open at least in part and at least one baffle plate. The device may also include at least one valve element which, together with the nozzle plate, forms at least one variable nozzle. The at least one variable nozzle may be arranged fluidically parallel to the at least one nozzle. The nozzle plate and the at least one valve element may be arranged axially displaceable relative to each other. The nozzle plate and the at least one baffle plate may be disposed at a fixed distance with respect to one another. Opposite the at least one nozzle and the at least one variable nozzle a baffle plate may be arranged, which deflects the gas flow emerging from the respective nozzle and on which liquid droplets precipitate.

Abstract: A vehicle may include an internal combustion engine having a crankcase and a supercharging apparatus, and a crankcase ventilation apparatus having at least one oil-separating apparatus including at least one oil separator. An oil return line may communicate separated oil from the crankcase ventilation apparatus to the crankcase. An ejector pump may be driven via a compressed air flow of the supercharging apparatus and may be configured to generate an underpressure for driving a blow-by gas. The crankcase ventilation apparatus may include a pump control valve configured to at least one of regulate and control the compressed air flow through the ejector pump.

Abstract: A pump device may include a side channel compressor that may include a housing having a conveying chamber and a fluid inlet and outlet. The compressor may include an impeller having blades radially on an outside and which may be mounted rotatably in the housing, the blades lying in the conveying chamber, and a shaft mounted rotatably about an axis of rotation and on which the impeller may be fastened. The conveying chamber may have at least one side channel running in a region of the blades and connecting the fluid inlet and outlet to one another in a circumferential direction. An intermediate region may be formed in the circumferential direction between the fluid inlet and outlet and in which a distance of the blades in an axial direction to the nearest wall may be such that no more than a predetermined amount of fluid flows in the intermediate region.

Abstract: A spiral compressor may include a stationary first spiral member and an orbiting second spiral member intermeshing with the first spiral member. The spiral compressor may include a pendulum slide mechanism that may have an inner ring and a stationary outer ring connected to the inner ring via a plurality of pendulums. The pendulum slide mechanism may include an eccentric member disposed on a radial inside of the inner ring with respect to a central access of the inner ring. The inner ring on an inner circumferential side may be drivingly connected to the eccentric member and on an outer circumferential side may be rigidly connected to the second spiral member. The second spiral member may transmit an orbiting motion in relation to the first spiral member via the pendulum slide mechanism when the eccentric member is driven.

Abstract: A vehicle may include an internal combustion engine having a crankcase and a supercharging apparatus, and a crankcase ventilation apparatus having at least one oil-separating apparatus including at least one oil separator. An oil return line may communicate separated oil from the crankcase ventilation apparatus to the crankcase. An ejector pump may be driven via a compressed air flow of the supercharging apparatus and may be configured to generate an underpressure for driving a blow-by gas. The crankcase ventilation apparatus may include a pump control valve configured to at least one of regulate and control the compressed air flow through the ejector pump.

Abstract: A spiral compressor may include a stationary first spiral member and an orbiting second spiral member intermeshing with the first spiral member. The spiral compressor may include a pendulum slide mechanism that may have an inner ring and a stationary outer ring connected to the inner ring via a plurality of pendulums. The pendulum slide mechanism may include an eccentric member disposed on a radial inside of the inner ring with respect to a central access of the inner ring. The inner ring on an inner circumferential side may be drivingly connected to the eccentric member and on an outer circumferential side may be rigidly connected to the second spiral member. The second spiral member may transmit an orbiting motion in relation to the first spiral member via the pendulum slide mechanism when the eccentric member is driven.

Abstract: A telescope has an entrance pupil region; a first concave mirror (M1) belonging to a first rotationally symmetric aspheric surface and reflecting light passing through the entrance pupil region; a second convex mirror (M2) belonging to a second rotationally symmetric aspheric surface and reflecting light reflected by the first mirror; a third convex mirror (M3) belonging to a third rotationally symmetric aspheric surface and reflecting light reflected by the second mirror; a fourth concave mirror belonging to a fourth rotationally symmetric aspheric surface and reflecting light reflected by the second mirror to an exit pupil. The first, second, third and fourth rotationally symmetric aspheric surfaces are centered on the symmetry axis of the third mirror. The first, second and fourth mirrors are centered along the first direction perpendicular to the optical axis and off-centered in a second direction perpendicular to the symmetry axis and to the first direction.

Abstract: The invention relates to an air conditioning system, especially a motor vehicle air conditioning system, that can be operated as a heat pump. Said system comprises a compressor (2), a heating body (3), a throttle element (4), and an evaporator (6), the compressor (2) having a variable stroke. The throttle element (4) is especially embodied as a controllable expansion valve (5) that contributes to the regulation of the heating capacity during the operation of the heat pump.

Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (TS) with the pressure being outside a predefinable intended pressure range ([pu,po]).

Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (Ts) with the pressure being outside a predefinable intended pressure range ([pu,po]).

Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (TS) with the pressure being outside a predefinable intended pressure range ([pu,po]).

Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (TS) with the pressure being outside a predefinable intended pressure range ([pu,po]).