Abstract: In a method for operating a motor vehicle having an internal combustion engine, pre-heating measures (7) for reaching operating temperatures for components of the exhaust-gas post-treatment system and/or for a lambda probe of the motor vehicle are provided prior to the departure (10) of the motor vehicle. The activation of a transducer (1) by a driver of the motor vehicle for explicitly announcing an impending departure of the motor vehicle is provided as the trigger for the pre-heating measures (7), in particular for avoiding an unnecessary initiation of pre-heating measures.

Abstract: In a method for operating a motor vehicle having an internal combustion engine, pre-heating measures (7) for reaching operating temperatures for components of the exhaust-gas post-treatment system and/or for a lambda probe of the motor vehicle are provided prior to the departure (10) of the motor vehicle. The activation of a transducer (1) by a driver of the motor vehicle for explicitly announcing an impending departure of the motor vehicle is provided as the trigger for the pre-heating measures (7), in particular for avoiding an unnecessary initiation of pre-heating measures.

Abstract: The invention relates to a fuel cell installation comprising a fuel cell unit (6). Said installation is also provided with a dosing unit (8) which comprises at least one dosing valve (7) and is used to dose a fuel (10) for at least one anode (12) of the fuel cell unit (6), and a starting valve for dosing the fuel (10) for at least one cathode (19) of the fuel cell unit (6) during a starting phase. The aim of the invention is to be able to produce and operate one such fuel cell installation in an economical manner. To this end, at least one throttle element (18) comprising a fixed internal cross-sectional area is used to fix the maximum quantity of fuel that can be dosed in the starting phase.

Abstract: The invention relates to a fuel cell installation comprising a fuel cell unit (6). Said installation is also provided with a dosing unit (8) which comprises at least one dosing valve (7) and is used to dose a fuel (10) for at least one anode (12) of the fuel cell unit (6), and a starting valve for dosing the fuel (10) for at least one cathode (19) of the fuel cell unit (6) during a starting phase. The aim of the invention is to be able to produce and operate one such fuel cell installation in an economical manner To this end, at least one throttle element (18) comprising a fixed internal cross-sectional area is used to fix the maximum quantity of fuel that can be dosed in the starting phase.

Abstract: A fuel cell device has a fuel cell, a hydrogen storage, and a hydrogen burner supplied from said hydrogen storage.

Abstract: A valve for controlling a fluid, in particular for controlling a gas, is described, encompassing a valve housing an actuation unit for an at least locally tubular valve armature which is guided axially displaceably and is equipped with a valve closure member by which a fluid flow between an inflow side and an outlet side is controllable and which coacts with a valve seat. The valve armature comprises a guidance collar in a region remote from the valve closure member, and is equipped with a second guidance in a region offset with respect to the guidance collar.

Abstract: A safety system for a gas-operated apparatus for generating energy, in particular in a vehicle, includes at least one sensor for measuring the gas concentration. The sensor is preferably disposed in the passenger compartment of the vehicle. In the event of a dangerously high gas concentration, a fan and/or power window control is triggered via a control unit in such a way that the fastest possible air exchange in the passenger compartment of the vehicle results.

Abstract: A device and a method are proposed for the introduction of a processing agent downstream of the engine, in particular a fuel, into the exhaust-gas stream of an internal combustion engine, in which a gas discharge for boosting an at least partial of the supplied processing agent is supported.

Abstract: A fuel cell apparatus has a diaphragm located between the anode and cathode sides of a fuel cell. At least one pressure compensation element (10, 20) is provided, which limits the differential pressure acting on the diaphragm (5).

Abstract: The invention relates to an apparatus for dividing an entering gas flow into two split flows, each of which flows through a branch of a line system. A control element is provided, which executes a control motion about a shaft between a first position and a second position. The entering gas flow is divided continuously, by means of the adjustable control element, at a volumetric flow ratio, and at the same time the control element allocates a medium to be metered, whose infeed point is associated with the control element, to the split flows at a different ratio VDOS.

Abstract: An apparatus for controlling a fuel cell device for energy supply in a finished end product has a control unit for an operation of the fuel cell device, the control unit being formed so as to control control operational points in predetermined phases during the operation and to obtain an adjustable value of at least one device variable of the fuel cell device and to evaluate it with respect to at least one previously determined value of the device variable of the fuel cell device.

Abstract: A fuel cell device has a fuel cell, a cooling unit for cooling the fuel cell, and a connecting unit for connecting the cooling unit to a cooled or air conditioned space for use of a space waste air for cooling.

Abstract: A fuel cell device has a fuel cell, a hydrogen storage, and a hydrogen burner supplied from said hydrogen storage.

Abstract: A device and a method are proposed for the introduction of a processing agent downstream of the engine, in particular a fuel, into the exhaust-gas stream of an internal combustion engine, in which a gas discharge for boosting an at least partial of the supplied processing agent is supported.

Abstract: A safety system for a gas-operated apparatus for generating energy, in particular in a vehicle, includes at least one sensor for measuring the gas concentration. The sensor is preferably disposed in the passenger compartment of the vehicle. In the event of a dangerously high gas concentration, a fan and/or power window control is triggered via a control unit in such a way that the fastest possible air exchange in the passenger compartment of the vehicle results.

Abstract: A fuel cell device has a fuel cell unit, a conversion unit for converting material mixtures to a hydrogen-containing fluid stream, a separation device for separating at least one hydrogen-enriched material stream from a fluid residual stream, the separation device being formed as a mass separation device for separating different masses.

Abstract: The invention relates to an apparatus for dividing an entering gas flow (1) into two split flows (20, 21), each of which flows through a branch (8, 9) of a line system. A control element (7) is provided, which executes a control motion (26) about a shaft (10) between a first position (27) and a second position (28). The entering gas flow (1) is divided continuously, by means of the adjustable control element (7), at a volumetric flow ratio VGas, and at the same time the control element (7) allocates a medium (5) to be metered, whose infeed point (3, 25) is associated with the control element (7), to the split flows (20, 21) at a different ratio VDOS.

Abstract: A method for the regeneration of an NOx store in the exhaust gas of internal combustion engines is presented. The NOx store takes up NOx from the exhaust gas when there is an oxygen excess therein and regenerates by outputting nitrogen when there is an oxygen deficiency in the exhaust gas. In the method, a reversal is made alternately between first phases having oxygen excess in the exhaust gas and second phases having oxygen deficiency. In the method, the oxygen deficiency in the exhaust gas is generated to regenerate the storage catalytic converter via a specific mass of fuel excess in the exhaust gas ahead of the NOx store. This mass is to be held constant.

Abstract: In a method and device for selective catalytic NOx reduction in oxygen-containing exhaust gases using ammonia and a reduction catalyst, gaseous ammonia is made available by heating a solid storage medium in a container. The method and device are suitable for use in motor vehicles in particular.

Abstract: A method and a device for selective catalytic NOx reduction in oxygen-containing exhaust gases using ammonia and a reduction catalyst (9) are described, according to which gaseous ammonia is made available by heating a solid storage medium (2) in a container (1). The method and the device are suitable for use in motor vehicles in particular.