Abstract: The invention relates to a method (100) and to a device (450) for reserve driving of a vehicle (400), wherein the vehicle (400) comprises a drive unit (410), an auxiliary unit (420) having a drive (430) associated with the auxiliary unit (420), and at least one wheel (440). The wheel (440) is designed to roll on the ground at least during reserve driving of the vehicle (400) or during the travel of the vehicle (400). The device (450) is designed to detect a failure of the drive unit (410); to couple the drive (430) of the auxiliary unit (420) to the wheel (440); and to operate the drive (430) of the auxiliary unit (420) for the reserve driving of the vehicle (400).

Abstract: For operating an internal combustion engine having a throttle situated in an exhaust line or exhaust return line, in which a heat engine is driven by a quantity of heat produced by the internal combustion engine, in a first non-heating operating mode of the internal combustion engine, a first setpoint value is preset, a first operating parameter that characterizes a temperature of the internal combustion engine is detected, a first triggering value is determined for the triggering of the at least one throttle as a function of the first setpoint value and the first operating parameter, the at least one throttle is triggered in accordance with the first triggering value, and the at least one heat engine is driven by the resulting quantity of heat.

Abstract: The invention relates to a method and an apparatus for detecting the point in time of commencement of crystallization of a heat storage material (40), in particular a latent heat storage material, which is supercooled by means of a Peltier element (32). The profile (10) of the current I of the Peltier element (32) is measured. The commencement of the crystallization process in the heat storage material (40) is deduced when a discontinuity (20, 22) which follows a continuous decrease (16) in the current and after which the current (I) increases again (18) is detected in the current profile (10).

Abstract: A latent heat storage for an internal combustion engine is described having a crystallizable storage medium for storing heat while utilizing the enthalpy of a melting procedure. The storage medium has a state of supercooled molten mass at ambient temperature. Furthermore, the latent heat storage includes a crystallization nucleus provider for providing a crystallization nucleus in the storage medium, in order to trigger a crystallization of the storage medium to release stored heat in the state of supercooled molten mass. Additionally, an internal combustion engine is provided having such a latent heat storage and a method for temperature control of an internal combustion engine. In a first step of the method, a crystallized storage medium is melted in order to store heat while utilizing the enthalpy of the melting procedure. The storage medium then cools down at most to the ambient temperature and forms a supercooled molten mass in the process.

Abstract: For operating an internal combustion engine having a throttle situated in an exhaust line or exhaust return line, in which a heat engine is driven by a quantity of heat produced by the internal combustion engine, in a first non-heating operating mode of the internal combustion engine, a first setpoint value is preset, a first operating parameter that characterizes a temperature of the internal combustion engine is detected, a first triggering value is determined for the triggering of the at least one throttle as a function of the first setpoint value and the first operating parameter, the at least one throttle is triggered in accordance with the first triggering value, and the at least one heat engine is driven by the resulting quantity of heat.

Abstract: Compressor, especially an axial piston compressor for a vehicle air-conditioning system, having a housing delimiting a drive mechanism chamber (17), having a cylinder block in which at least one piston is mounted so as to be axially displaceable back and forth, and having a cylinder head having a suction side and a delivery side, there being provided between the drive mechanism chamber (17) and the suction side (18) a fluid connection (12, 13) in which there is arranged a regulating valve (10) by means of which, starting from a predetermined pressure difference between the drive mechanism chamber (17) and the suction side (18), the fluid connection between the drive mechanism chamber and the suction side is increasingly throttled as the pressure difference further increases, in order that the mass flow flowing out is thereby maintained at an approximately constant low initial level.

Abstract: Compressor, especially a compressor for the air-conditioning system of a motor vehicle, having a housing (1) and, for drawing in and compressing a coolant, a compressor unit arranged in the housing (1) and driven by means of a drive shaft, the compressor unit being regulated by means of the pressure (PC) prevailing in a drive mechanism chamber substantially bounded by the housing (1), there being an additional regulation device (17) and/or control device for the inlet-gas-side coolant mass flow and/or the inlet pressure and/or the inlet density.