Abstract: Diaphragm pump for delivering a fluid, in particular an exhaust-gas aftertreatment medium, such as an aqueous urea solution for example, comprising a working chamber (1) which is delimited by a working diaphragm (2) and which can be connected via a first valve (3) to an inlet (4) and via a second valve (5) to an outlet (6), and an electromagnet (7) which comprises a coil assembly (8) and an armature (9) which interacts with the coil assembly (8) and is operatively connected to the working diaphragm (2). According to the invention, the valves (3, 5) are configured in a valve plate (10) which is arranged between the coil assembly (8) and the armature (9). Exhaust-gas aftertreatment system having a diaphragm pump of this type.

Abstract: The invention relates to a plastic vehicle tank for an aqueous urea solution used for reducing the hydrogen oxide content in exhaust gases of an internal combustion engine. In the preferred embodiment, the inventive tank comprises a functional unit comprising at least one pump, at least one pressure control valve, at least one internal container provided with an internal electrical heating and at least one suction line. The functional unit is preferably mounted in the form of a lid on the container opening for closing it.

Abstract: The invention relates to a delivery module for a dosage system used to introduce a reducing agent into the exhaust gas tract of an internal combustion engine. The delivery module has a housing, which accommodates various components, and which is produced as an injection moulded component. A heating system is integrated in the vicinity of the center of the housing. The housing has at least one chamber for receiving additional components.

Abstract: The invention relates to a device for metering a liquid reducing agent into an exhaust gas system for the reduction of pollutants in the exhaust gas. The device comprises a metering valve and an adapter to be mounted on an exhaust gas pipe. The metering valve is connected to the adapter by a connector element, which has at least one metal sound absorber.

Abstract: The invention relates to a valve arrangement (2) for metering a fluid medium into an exhaust line (22), comprising a valve seat (10) which acts together with a closing body (12) and in which a valve passage (14) is implemented, and a perforated disc (6) that is disposed downstream of the valve seat, closes off the valve passage, and has at least one axial hole (8) in the area of the valve passage through which the fluid medium can be injected into the exhaust line (22). The valve arrangement further comprises a connecting flange (16) for connecting the valve arrangement (2) to the exhaust line (22) in a fluid-tight manner, wherein the perforated disc (6) extends from the valve passage to the connecting flange and is implemented such that said perforated disc seals the connecting flange against the exhaust line in a fluid-tight manner in the installed state. A separate seal is thus no longer required, because the perforated disc performs the sealing function.

Abstract: The invention relates to a device (40) for reducing pollutants, in particular nitrogen oxides, in an exhaust gas flow of an internal combustion engine, comprising a reducing agent (46), in particular a urea-water solution, which is stored in a storage tank (42), a metering module, in particular a nozzle (68), for injecting the reducing agent (46) into the exhaust gas flow, and a pump (56, 100) for delivering the reducing agent (46) from a suction point (62) in the storage tank (42) to the metering module via lines (58, 66). According to the invention, the pump (56, 100) lies beneath a reducing agent level (44) in the storage tank (42), and a non-return valve is provided. As a result of the non-return valve, the device (40) is prevented from refilling with the reducing agent (46) after the reducing agent (46) is completely sucked back from the device (40) after shutting off the internal combustion engine, in particular after extended idle times of the internal combustion engine.

Abstract: The invention relates to a device for the regeneration, temperature loading and/or thermal management of a component, assigned to an exhaust system, of an internal combustion engine. The device includes at least one injection valve which injects a fluid, in particular fuel, into the exhaust system, preferably in chatter mode, for example as a function of the pressure of the supplied fluid. The injection valve has a valve head and a valve seat which have geometries designed in such a way that a fluidic force of the supplied fluid acting on the injection valve drops continuously over a stroke of the valve head. The invention also relates to an injection valve having such valve-head and valve-seat geometries and to a corresponding method for the regeneration, temperature loading and/or thermal management of a component, assigned to an exhaust system, of an internal combustion engine.

Abstract: The invention relates to a line feedthrough through a heating kettle cover of a heating kettle of a reducing agent tank. At least one line penetrates an opening of the heating kettle cover and is sealed by means of a sealing element. It is provided that the sealing element is configured as an elastic plug sealing stopper, which is inserted in a holder associated with the heating kettle cover in a sealing manner.

Abstract: The invention relates to a storage tank (10) for receiving a medium (12) that can be frozen, in particular a reducing agent, comprising a ventilation unit (34, 36; 72) and a crucible-shaped container (22) introduced in the storage tank (10). An air chamber (50) in the crucible-shaped container (22) is connected via a ventilation line (60) or an overflow opening (40) to an air chamber (48) of the storage tank (10), which is ventilated via a ventilation unit (34, 36; 72).

Abstract: The invention relates to a retainer device for retaining a reducing agent metering valve. The retainer device at least partially surrounds an interior space which is provided for holding the reducing agent metering valve. According to the invention, the retainer device has a sound dampening device which dampens sound vibrations emerging from the interior space.

Abstract: The invention relates to a reservoir tank for a reducing agent (1), in particular an aqueous urea solution for the after-treatment of exhaust gas from a combustion engine, comprising an outer container (2) and a pot-shaped inner container (3) which limits a partial volume (4) of the volume (5) of the outer container (2), a heating element (6) which is set in the inner container (3) and an extraction device (7) for extracting the reducing agent (1). According to the invention, the pot-shaped inner container (3) is surrounded in the floor region by an insulated collar (8) comprising a first limb (9) led to the outer circumferential surface (11) of the inner container (3) and a second limb (10) contacting the floor surface (12) of the outer container (2), such that the insulated collar (8) limits an additional partial volume (13) of the volume (5) of the outer container (2).

Abstract: A metering device for introducing liquid reducing agent into an exhaust gas pipe. A metering valve is supplied with contents from a working tank by a delivery unit and dispenses the tank contents in a discharge direction. The delivery unit establishes a negative pressure between the delivery unit and the metering valve when the delivery direction is reversed. The negative pressure causes gas to be drawn off through the metering valve against the discharge direction. The delivery direction is reversed by either a feed pump with a reversible effective direction or a feed pump and a repolarization valve which communicates with the feed pump and transposes an inlet and an outlet of the feed pump.

Abstract: The invention relates to a tank for storing a reducing agent, in particular a liquid reducing agent. The reducing agent reduces the nitrogen oxides from the waste gases of the internal combustion engine to nitrogen and water. The tank includes an external container in which an internal container is accommodated. A heating element is provided in the internal container and the liquid reducing agent can be removed by a removal device. The internal container is connected to the external container in such a way that the liquid reducing agent can flow out from the internal container into the external container.

Abstract: The invention relates to a method for operating a metering valve arranged in an exhaust gas region of an internal combustion engine for metering a reagent or a precursor of a reagent, comprising a cooling device to prevent excess temperatures. The invention further relates to a device for carrying out the method. During metering breaks of the regular metering process, a targeted predetermined minimum amount is metered for the cooling of the metering valve, if required.

Abstract: The invention relates to a storage tank (12) of a metering system (10) for introducing a reducing agent (32) in an exhaust gas tract of an internal combustion engine. The storage tank (12) comprises at least one opening (50) for mounting components (20, 24) and openings (46, 48, 63) for filling and emptying as well as venting (62). All openings (46, 48, 50, 62) are arranged above a region of the storage tank (12) flooded by the reducing agent (32).

Abstract: The invention relates to a dosing system (10) for introducing a reducing agent (18), especially urea or an aqueous urea solution, into an exhaust gas system of an internal combustion engine. The dosing system (10) comprises a reservoir (12, 14) for accommodating a stock in the reducing agent (18), a delivery unit (32), a level sensor (50) and a dosing module (38). The reservoir (40) is a standard reservoir integrated into a vehicle-specific component (60), especially a fuel tank (68).

Abstract: The invention relates to a tank for storing a liquid active ingredient for operating an aggregate of a motor vehicle, particularly a unit for post treatment of exhaust gases of the motor vehicle, comprising a container and at least one functional element (11, 18) extending into the container, wherein the functional element is provided with at least one agent (25, 26) for abrasion protection.

Abstract: The invention relates to a delivery module for a dosage system used to introduce a reducing agent into the exhaust gas tract of an internal combustion engine. The delivery module has a housing, which accommodates various components, and which is produced as an injection moulded component. A heating system is integrated in the vicinity of the center of the housing. The housing has at least one chamber for receiving additional components.

Abstract: The invention relates to a sensor arrangement for determining a tank fill level of a liquid, especially a reducing agent for removing nitrogen from the exhaust gases of an internal combustion engine, which liquid is contained in a tank, at least two electrically conductive measuring electrodes being at least partially embedded in a carrier that is produced of an electrically non-conductive material. The sensor arrangement includes a temperature sensor, especially a resistor with negative temperature coefficient being used as a temperature sensor, which is integrated into the carrier.

Abstract: The invention relates to a retainer device for retaining a reducing agent metering valve. The retainer device at least partially surrounds an interior space which is provided for holding the reducing agent metering valve. According to the invention, the retainer device has a sound dampening device which dampens sound vibrations emerging from the interior space.