Abstract: A component carrier of a dosing system including a plurality of components for injecting a urea solution into the exhaust gas flow of an internal combustion engine comprises a base plate forming the component carrier, a plurality of inner flow channels integrated into the base plate, and an inlet port and an outlet port connecting the inner flow channels with the coolant circuit of the internal combustion engine. The component carrier is heated by flowing a fluid having an elevated temperature and circulating in the coolant circuit from the inlet port to the outlet port passing through the inner flow channels and transferring the heat from the fluid to the component carrier. The components of the dosing system mounted on the component carrier and in thermal contact with the component carrier are heated by heat transfer from the heated component carrier.

Abstract: The invention relates to a reducing agent metering system for injecting a reducing agent into the exhaust gas stream of a combustion engine for selective catalytic reduction, with a feed pump, by means of which reducing agent is conveyed from a reducing agent tank via a delivery line and is introduced via at least one nozzle into the exhaust gas stream of the combustion engine, whereby the delivery line is formed by a hose (1) that has on the outside an electrical conductor (2) that encloses the hose (1) like a jacket, whereby the reducing agent metering system has a monitoring unit by means of which the electrical conductivity between the reducing agent in the hose (1) and the electrical conductor (2) is monitored.

Abstract: The invention relates to an electronically controlled metering system having at least one sensor for injection of a reducing agent, especially a urea solution, into the exhaust gas stream of an internal combustion engine for selective catalytic reduction, the metering system being connected/connectable to a tank from which the reducing agent can be taken, the reducing agent being conveyed by means of a pump, the metering system having a first line which carries the reducing agent and the metering system having a compressed air supply and a second line which carries compressed air and at least one nozzle which is coupled to both lines and by which the reducing agent together with the compressed air can be injected into the exhaust gas stream, the metering system in the line which carries the reducing agent having at least one damping element for equalization of pressure fluctuations.

Abstract: The invention relates to a reducing agent metering system, and to a method for controlling the injection of a reducing agent into the exhaust gas flow (9) of a turbocharged internal combustion engine for selective catalytic reduction, wherein the metering system can be connected to a reducing agent tank (1), from which reducing agent can be removed, wherein the metering system comprises at least one nozzle (5) through which the reducing agent can be injected by means of compressed air into the exhaust gas flow (9), wherein at least one part of the compressed air is taken from a charger of the internal combustion engine, wherein the compressed air supply (6) comprises an electric air pump (7) for generating compressed air, and comprises a bypass (19) in parallel with the air pump (7), so that the charge air of the turbocharger flows over or can flow over the air pump (7).

Abstract: The invention relates to a reducing agent dosing system for injecting a reducing agent into the exhaust-gas flow of an internal combustion engine for selective catalytic reduction, wherein the dosing system can be or is connected to a reducing agent tank (1) from which reducing agent is extracted and delivered by means of a reducing agent pump (2), wherein there is a compressed air supply (3) and at least one nozzle (4) is provided which is connected to the pressure line (11) of the reducing agent pump (2) and via which the reducing agent is introduced into the exhaust-gas flow and atomized by means of compressed air, wherein the pressure line (11) of the reducing agent pump (2) issues via an inlet (6) into a valve (5) which, when it is subjected to pressure by reducing agent delivered by the reducing agent pump (2), opens up the inlet (6) to the valve (5) and an overflow duct to an outlet (7) of the valve to a dosing line (12) to the nozzle (4).

Abstract: The invention relates to an injection nozzle (1) for injection of a reducing agent into an exhaust gas system (2) of an internal combustion engine for selective catalytic reduction, especially for atomization by means of compressed air or propellant gas, the nozzle (1) having at least one outlet opening, the nozzle (1) upstream of the outlet opening having a variable volume (8) which after completion of injection of the liquid is increased in order to draw gas from the vicinity (2) through the outlet opening into the nozzle (1).

Abstract: The invention relates to a metering system for injecting a urea solution into the exhaust gas flow (9) of an internal combustion engine for selective catalytic reduction, and method for controlling the injecting of a urea solution by means of compressed air, wherein the metering system can be connected to a urea solution tank (1), wherefrom urea solution can be removed, and wherein the metering system can be connected to a compressed air supply (6), wherein the metering system comprises at least one nozzle (5) through which the urea solution can be injected into the exhaust gas flow (9) by means of compressed air, wherein the metering system comprises an air valve (7) by means of which the pressure and/or the quantity of air and/or the valve opening times of the compressed air supply (6) can be regulated, and a sensor for measuring the pressure and/or the quantity of air is disposed in the compressed air supply (6) between the air valve (7) and the nozzle (5), so that the quantity of compressed air fed in for

Abstract: The invention relates to a reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, with a delivery pump (2) by means of which the reducing agent is delivered from a reducing agent tank (1) via a delivery line (3) and is introduced into the exhaust gas flow of the internal combustion engine via at least one nozzle (7), a metering chamber (4) being integrated into the delivery line (3) and being divided into two separate volumes (10, 20) by means of a position-variable element (5), each of the two volumes (10, 20) having at least one input (11, 21) and at least one output (12, 22). Furthermore the invention relates to a method for operating such a reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction.

Abstract: A component carrier (20) of a dosing system for injecting a urea solution to the exhaust-gas flow (9) of an internal combustion engine for the purpose of selective catalytic reduction, wherein the dosing system can be connected to a urea solution tank (1) from which urea solution can be extracted, and wherein the dosing system can be connected to a compressed air supply (6), wherein the dosing system has a pump (3) for feeding the urea solution and wherein the dosing system has at least one nozzle (5) by means of which the urea solution can be injected into the exhaust-gas flow (9) by means of compressed air, wherein components (2, 3, 7, 13, 14, 51, 52) of the dosing system can be mounted on the component carrier (20) so as to be in thermal contact with the component carrier (20), and wherein the component carrier (20) has at least one contact region (21, 22) for producing thermal contact with respect to the coolant circuit of the internal combustion engine, such that the component carrier (20) forms a heat s

Abstract: A component carrier of a dosing system including a plurality of components for injecting a urea solution into the exhaust gas flow of an internal combustion engine comprises a base plate forming the component carrier, a plurality of inner flow channels integrated into the base plate, and an inlet port and an outlet port connecting the inner flow channels with the coolant circuit of the internal combustion engine. The component carrier is heated by flowing a fluid having an elevated temperature and circulating in the coolant circuit from the inlet port to the outlet port passing through the inner flow channels and transferring the heat from the fluid to the component carrier. The components of the dosing system mounted on the component carrier and in thermal contact with the component carrier are heated by heat transfer from the heated component carrier.

Abstract: A metering system for injecting a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, including a reducing agent tank, a metering pump, an air compressor for a compressed air supply, at least one nozzle which is in a flow connection to a pressure line of the compressed air supply and a pressure line of the metering pump and by which the reducing agent can be injected into the exhaust gas flow by means of compressed air, the air compressor being located on a mounting plate and having channels which form intake and pressure lines of the air compressor and which have connection regions at the outlets from the mounting plate and one or more pockets which are in a flow connection to the channels and which form the intake connection and/or the pressure connection of the air compressor.

Abstract: A metering system for injecting a urea solution into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, and method for controlling the injecting of a urea solution by means of compressed air, wherein the metering system is connected to a urea solution tank and a compressed air supply, wherein the metering system comprises at least one nozzle through which the urea solution can be injected into the exhaust gas flow by compressed air, including an electronic control unit and air valve for regulating the pressure and/or the quantity of air and/or the valve opening times of the compressed air supply and a sensor for measuring the pressure and/or the quantity of air disposed in the compressed air supply between the air valve and the nozzle so that the quantity of compressed air fed in for atomizing the urea solution is controlled.

Abstract: The invention relates to an exhaust gas aftertreatment system for delivering a reducing agent (15) into the exhaust gas stream of an internal combustion engine for selective catalytic reduction, the system having a reducing agent tank (1) and a pump (3) for delivering the reducing agent from the tank (1) to an injection unit, the tank (1) having at least one opening, the pump (3) being made as an integrated unit (2) and being plugged into the opening of the tank, the integrated unit (2) forming a tank closure and sealing the tank.

Abstract: The invention relates to an injection nozzle (1) for injection of a reducing agent into an exhaust gas system (2) of an internal combustion engine for selective catalytic reduction, especially for atomization by means of compressed air or propellant gas, the nozzle (1) having at least one outlet opening, the nozzle (1) upstream of the outlet opening having a variable volume (8) which after completion of injection of the liquid is increased in order to draw gas from the vicinity (2) through the outlet opening into the nozzle (1).

Abstract: The invention relates to a reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, the metering system being connected/connectable to a reducing agent tank from which the reducing agent is taken and delivered by means of a delivery pump via a delivery line (1) and is introduced into the exhaust gas flow of the internal combustion engine via at least one nozzle, a Venturi tube (2) being integrated into the delivery line (1) and having a branch (3) which discharges into the nozzle, at the outlet (4) of the Venturi tube (2) there being an openable shutoff element so that with the shutoff element opened the reducing agent which is located in the nozzle and the branch (3) is intaken as a suction medium into the Venturi tube (2) and is carried away via the outlet (4).

Abstract: The invention relates to a reducing agent dosing system for injecting a reducing agent into the exhaust-gas flow of an internal combustion engine for selective catalytic reduction, wherein the dosing system can be or is connected to a reducing agent tank (1) from which reducing agent is extracted and delivered by means of a reducing agent pump (2), wherein there is a compressed air supply (3) and at least one nozzle (4) is provided which is connected to the pressure line (11) of the reducing agent pump (2) and via which the reducing agent is introduced into the exhaust-gas flow and atomized by means of compressed air, wherein the pressure line (11) of the reducing agent pump (2) issues via an inlet (6) into a valve (5) which, when it is subjected to pressure by reducing agent delivered by the reducing agent pump (2), opens up the inlet (6) to the valve (5) and an overflow duct to an outlet (7) of the valve to a dosing line (12) to the nozzle (4).

Abstract: A component carrier (20) of a dosing system for injecting a urea solution to the exhaust-gas flow (9) of an internal combustion engine for the purpose of selective catalytic reduction, wherein the dosing system can be connected to a urea solution tank (1) from which urea solution can be extracted, and wherein the dosing system can be connected to a compressed air supply (6), wherein the dosing system has a pump (3) for feeding the urea solution and wherein the dosing system has at least one nozzle (5) by means of which the urea solution can be injected into the exhaust-gas flow (9) by means of compressed air, wherein components (2, 3, 7, 13, 14, 51, 52) of the dosing system can be mounted on the component carrier (20) so as to be in thermal contact with the component carrier (20), and wherein the component carrier (20) has at least one contact region (21, 22) for producing thermal contact with respect to the coolant circuit of the internal combustion engine, such that the component carrier (20) forms a heat s