Abstract: Method and apparatus for measuring catalytic reactivity in diagnosing a gas-permeable object, such as a catalyst or a filter, that has been removed from an exhaust gas tract connected downstream of an internal combustion engine of, motor vehicle. The method includes applying, through an opening in a device, a test medium with a defined composition, to a front face of the removed object; and measuring, at a position located, with respect to a flow direction of the test medium, downstream of the front face, at least of: a concentration of at least one reduced or oxidized constituent of the test medium after passage of the test medium through the gas-permeable object; and a temperature of the object after the test medium is applied to the gas-permeable object.

Abstract: The invention relates to a method for the quality improvement of a gas-permeable object, such as a filter or catalyst, removed from an exhaust gas system of an internal combustion engine. To attain a cost-effectively realizable method, it is provided according to the invention that, in an automated process, a condition of the object is measured, after which a quality improvement is carried out, after which a condition of the object is measured again. Furthermore, the invention relates to an apparatus for the diagnosing and quality improvement of a gas-permeable object, such as a filter or a catalyst, removed from an exhaust gas system of an internal combustion engine.

Abstract: The invention relates to a method for diagnosing a gas-permeable object, such as a catalyst (15) or a filter, that was removed from an exhaust gas tract connected downstream of an internal combustion engine, in particular removed from a motor vehicle. In order to obtain particularly precise information about a function of the catalyst (15), according to the invention, an end face of the catalyst (15) is subjected to a test medium of a defined composition, such as propane gas or carbon monoxide, through an opening (5) by means of a device (2) in order to measure a catalytic reactivity. At a position located downstream, a concentration of at least one reduced or oxidized constituent of the test medium is measured after having passed the catalyst (15) and/or a temperature of the object after being subjected to the test medium is measured.

Abstract: An apparatus for metering a urea or a urea-water solution for delivery to a catalytic converter assembly for removing nitrogen oxides from the exhaust gases of a Diesel engine, includes a housing block supporting function components communicating via a line, formed by recesses in the housing block, for transporting the reducing agent, and the walls of the line are formed by the housing block. This apparatus assures a simple line layout for reducing agent with a minimum number of sealing points that is accordingly appropriate for large-scale mass production.

Abstract: The apparatus for generating a mixture of reducing agent and air has a pumping agent feed pump having a pump housing and a mixing chamber into which reducing agent and air pumped by the feed pump can be introduced; the mixing chamber is embodied in a mixing chamber body which communicates directly with the pump housing of the feed pump and forms a cap of the pump housing. The feed pump has a drive shaft which protrudes into the pump housing, and the mixing chamber body is disposed at least approximately radially to the drive shaft The apparatus has a compact structural size and only a slight reducing agent-filled idle volume.

Abstract: A valve device for metering a fluid for metering a urea-water solution for the aftertreatment of exhaust gases from internal combustion engines, which contains elements that flex or are compressed under high pressure so that the volume of the working chamber can change in order to limit high pressures, which arise in the event of a phase change of the fluid to be metered, to a non-damaging intensity.

Abstract: A device used in an exhaust gas posttreatment system of an internal combustion engine has a mixing chamber into which reducing agent controlled by a metering valve, and air under pressure, can be introduced. The mixing chamber is embodied in a mixing chamber body, with which a valve body of the metering valve is connected. The mixing chamber discharges into a connection stub, and the metering valve has a valve member, which to control the reducing-agent/air mixture supply means into the mixing chamber cooperates with the face end of the connection stub as a valve seat. The valve body is screwed into a bore of the mixing chamber body.

Abstract: Device and method for purifying exhaust gases from motor vehicles. A housing includes an intake opening, an outlet opening, an exhaust gas inflow area, an exhaust gas outflow area, and a longitudinal axis. At least one module for purifying exhaust gas is arranged in the housing and has a module axis. The at least one module connects the exhaust gas inflow area and the exhaust gas outflow area, and the module axis is tilted relative to the longitudinal axis of the housing. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: Device and method for purifying motor vehicle exhaust gases. The device includes a metallic housing with plural intakes for a time-offset introduction of individual exhaust gas flows and at least one outlet for discharging exhaust gas. At least one purification module with at least one of: at least one filter element and at least one catalyst element is arranged within the housing, and a gas-permeable metal foam body is disposed on an intake side of the at least one purification module on an intake side. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: A method and a device for metering a reducing agent is described, which is used for mass regulated metering of a reducing agent, in particular urea or a urea-water solution for the exhaust gas treatment of the exhaust gas of a diesel engine in particular. The device includes a mass sensor for measuring the reducing agent mass flow into the catalytic converter system.

Abstract: A method and an apparatus for metering a reducing agent in which the reducing agent is delivered, via a line and a final control element that regulates the metering, in particular a metering valve, to a catalytic converter assembly for removing nitrogen oxides from the exhaust gases, in particular of a Diesel engine; a pressure drop in the line dictated especially by gas inclusions is detected, and the line is ventilated via the final control element.

Abstract: An apparatus for metering a urea or a urea-water solution for delivery to a catalytic converter assembly for removing nitrogen oxides from the exhaust gases of a Diesel engine, includes a housing block supporting function components communicating via a line, formed by recesses in the housing block, for transporting the reducing agent, and the walls of the line are formed by the housing block. This apparatus assures a simple line layout for reducing agent with a minimum number of sealing points that is accordingly appropriate for large-scale mass production.

Abstract: A device for generating a mixture of reducing agent and air, having a mixing space into which reducing agent via a reducing agent delivery conduit and air via an air delivery conduit can be introduced into the mixing space, having means for pressurizing the air, in such a way that the air flows essentially at the speed of sound through the air delivery conduit.

Abstract: A valve device for metering a fluid for metering a urea-water solution for the aftertreatment of exhaust gases from internal combustion engines, which contains elements that flex or are compressed under high pressure so that the volume of the working chamber can change in order to limit high pressures, which arise in the event of a phase change of the fluid to be metered, to a non-damaging intensity.

Abstract: The apparatus (10) for generating a mixture of reducing agent and air has a feed pump (16), by which reducing agent is pumped and which has a pump housing (22, 32). The apparatus (10) furthermore has a mixing chamber (50), into which reducing agent and air pumped by the feed pump (16) can be introduced; the mixing chamber (50) is embodied in a mixing chamber body (36). The mixing chamber body (36) communicates directly with the pump housing (22, 32) of the feed pump (16) and forms a cap of the pump housing (22, 32). The feed pump (16) has a drive shaft (24) for a feed element (30), which protrudes into the pump housing (22) of the feed pump (16), and the mixing chamber body (36) is disposed at least approximately radially to the drive shaft (24). The apparatus (10) has a compact structural size and only a slight reducing agent-filled idle volume.

Abstract: The device is a component of a system for posttreatment of the exhaust gas of a self-igniting internal combustion engine; by means of the mixture of reducing agent and air that it generates, the action of a reduction catalytic converter is improved. The device has a mixing chamber (22), into which reducing agent, via a reducing agent supply means controlled by a metering valve (24), and air, via an air supply means, can be introduced. The mixing chamber (22) is embodied in a mixing chamber body (20), with which a valve body (26) of the metering valve (24) is connected. The mixing chamber (22) discharges, toward the metering valve (24), into a connection stub (42), and the metering valve (24) has a valve member (74), which to control the reducing-agent/air mixture supply means into the mixing chamber (22) cooperates at least indirectly with the face end (43) of the connection stub (42) as a valve seat. The valve body (26) is screwed into a bore (38) of the mixing chamber body (20).

Abstract: A method and an apparatus for metering a reducing agent are proposed, in which the reducing agent is delivered, via a line (12) and a final control element that regulates the metering, in particular a metering valve, to a catalytic converter assembly (30) for removing nitrogen oxides from the exhaust gases, in particular of a Diesel engine; a pressure drop in the line (12) dictated especially by gas inclusions is detected, and the line (12) is ventilated via the final control element.

Abstract: A method and a device for metering a reducing agent is described, which is used for mass regulated metering of a reducing agent, in particular urea or a urea-water solution for the exhaust gas treatment of the exhaust gas of a diesel engine in particular. The device includes a mass sensor for measuring the reducing agent mass flow into the catalytic converter system.

Abstract: A device for generating a mixture of reducing agent and air, having a mixing space (16) into which reducing agent via a reducing agent delivery conduit (64) and air via an air delivery conduit (61) can be introduced into the mixing space (16), having means for pressurizing the air, in such a way that the air flows essentially at the speed of sound through the air delivery conduit (61).

Abstract: A fuel supply device for an internal combustion engine has a supply container, at least one feed pump for supplying a fuel from the supply container, a high pressure pump to which the fuel is supplied from the supply container by the feed pump, so that the fuel is supplied under high pressure at least indirectly to injection points of an internal combustion engine, the feed pump being driven mechanically by the internal combustion engine, and a further feed pump provided additionally to the mechanically driven feed pump and supplying the fuel from the supply container to the high pressure pump, the further feed pump having an electric drive and being operable independently from the mechanically driven feed pump.