Abstract: An electrically driven motor vehicle has current collectors for pickup from a dual-pole power transmission line device. A device determines the voltages between a vehicle chassis and the current collectors. The device is a bridge circuit with two equal voltage divider resistors connected in series between the two current collectors and a bridge shunt resistor electrically connected to a center tap between the voltage divider resistors and to the vehicle chassis, or the device has two voltage measurement devices for determining a voltage between the first current collector and the vehicle chassis and a voltage between the second current collector and the vehicle chassis. There is also described a method for operating the motor vehicle and a system with the motor vehicle and a dual-pole power transmission line device.

Abstract: A drive unit for a motor vehicle that includes an internal combustion engine, which has a combustion engine and an exhaust gas line, via which exhaust gas can be removed from the combustion engine. A cyclic process device is provided for converting the thermal energy of the exhaust gas into mechanical work in a thermodynamic cyclic process, wherein a working medium with respect to its direction of flow flows through a first heat exchange device, in which a heat transfer from the exhaust gas to the working medium takes place, then flows through an expansion device, in which an expansion of the working medium and thereby the generation of the mechanical work take place, and then flows through a second heat exchange device, in which a heat transfer from the working medium to a cooling medium takes place.

Abstract: An internal combustion engine having at least one combustion chamber, the internal combustion engine being connected via the exhaust thereof with an exhaust system. Disposed in the exhaust system is a heat exchanger of an exhaust heat recovery system, which can be used to transfer the waste heat of the exhaust gas to an operating fluid of the exhaust heat recovery system. Furthermore, the internal combustion engine is couplable to an air-conditioning compressor of an air-conditioning circuit. The exhaust heat recovery system has a further heat exchanger, in which the waste heat of a compressed refrigerant of the air-conditioning circuit is transferred to the operating fluid of the exhaust heat recovery system.

Abstract: An internal combustion engine having at least one combustion chamber, the internal combustion engine being connected via the exhaust thereof with an exhaust system. Disposed in the exhaust system is a heat exchanger of an exhaust heat recovery system, which can be used to transfer the waste heat of the exhaust gas to an operating fluid of the exhaust heat recovery system. Furthermore, the internal combustion engine is couplable to an air-conditioning compressor of an air-conditioning circuit. The exhaust heat recovery system has a further heat exchanger, in which the waste heat of a compressed refrigerant of the air-conditioning circuit is transferred to the operating fluid of the exhaust heat recovery system.

Abstract: A drive unit for a motor vehicle that includes an internal combustion engine, which has a combustion engine and an exhaust gas line, via which exhaust gas can be removed from the combustion engine. A cyclic process device is provided for converting the thermal energy of the exhaust gas into mechanical work in a thermodynamic cyclic process, wherein a working medium with respect to its direction of flow flows through a first heat exchange device, in which a heat transfer from the exhaust gas to the working medium takes place, then flows through an expansion device, in which an expansion of the working medium and thereby the generation of the mechanical work take place, and then flows through a second heat exchange device, in which a heat transfer from the working medium to a cooling medium takes place.

Abstract: A method for determining the temperature of an electrically heatable catalytic converter having an electric heating element that includes a heating resistor, the electrical resistance of which changes as a function of the component temperature of the electrically heatable catalytic converter. This resistance is determined from the current intensity and the voltage at the electrically heatable catalytic converter, and is used to determine the component temperature of the catalytic converter, based on a characteristic curve stored in the control unit. The energization of the heating resistor for determining the component temperature takes place in each case for only a short time in order to minimize the energy input into the heating resistor and thus avoid overheating of the heating resistor. In addition, by use of the short time interval, the aim is to minimize the energy requirements for determining the component temperature of the electrically heatable catalytic converter.

Abstract: A method for determining the temperature of an electrically heatable catalytic converter having an electric heating element that includes a heating resistor, the electrical resistance of which changes as a function of the component temperature of the electrically heatable catalytic converter. This resistance is determined from the current intensity and the voltage at the electrically heatable catalytic converter, and is used to determine the component temperature of the catalytic converter, based on a characteristic curve stored in the control unit. The energization of the heating resistor for determining the component temperature takes place in each case for only a short time in order to minimize the energy input into the heating resistor and thus avoid overheating of the heating resistor. In addition, by use of the short time interval, the aim is to minimize the energy requirements for determining the component temperature of the electrically heatable catalytic converter.