The invention relates to a delivery module (1) for a metering system for metering a reducing agent, in particular an aqueous urea solution, into an exhaust gas section of a motor vehicle, comprising a pump (2) which is connected or can be connected to a reducing agent storage tank (4) on the suction side via a suction line (3) and to a metering module (6) on the pressure side via a delivery line (5), wherein a return line (7) which leads back into the storage tank (4) branches off from the delivery line (5). According to the invention, a filter (8) is integrated into the delivery module (1) on the suction side. The invention additionally relates to a metering system comprising such a delivery module (1).

An inline reductant filter assembly includes a filter housing, a filter media, and one or more valves. The filter housing is fluidly coupled to an upstream portion of a reductant line and a downstream portion of the reductant line. The filter media is positioned in the filter housing. The one or more valves are selectively movable from a first position to a second position. In the first position, the one or more valves permit fluid to flow along a first fluid flow path from the upstream portion of the reductant line, through the filter media, to the downstream portion of the reductant line. In the second position, the one or more valves prevent fluid from flowing along the first fluid flow path through the filter media.

A vehicle includes an exhaust aftertreatment system for use with an automotive internal combustion engine. The system includes a reagent mixer configured to deliver a reagent for mixing with exhaust gases produced by the engine. The reagent mixer includes a flow-redirection housing defining an mixing chamber and a manifold coupled downstream of the flow-redirection housing. A doser is mounted to the flow-redirection housing and is configured to inject the reagent toward the mixing chamber.

An auxiliary system with purge control automatically supplies diesel exhaust fluid (DEF) to an onboard DEF tank of a diesel engine to enable prolonged unattended operation. The system includes an auxiliary DEF tank, an auxiliary DEF supply line, a controller, a pump, an air inlet, and a three-way valve configured to switch the pump inlet between the auxiliary DEF tank and air. In response to low-level DEF, the pump delivers DEF through the supply line to replenish the onboard DEF tank. The controller may automatically calculate onboard DEF tank volume based on the delivered volume of DEF, and DEF level data received from an ECM, to enable replenishment control regardless of engine make and model. In response to high-level DEF, engine stoppage, or other system fault, the controller switches the valve to air and runs the pump for a predetermined time to purge DEF from the supply line. The auxiliary system may be skid-mounted, portable, and configured to supply DEF to multiple diesel engines.

A reagent dosing system includes an injector having an outlet configured to be in fluid communication with the exhaust conduit; a reagent tank configured to hold a volume of reagent; a water tank configured to hold a volume of water; and a means for 1) pumping reagent from the reagent tank to the injector for injection of reagent into the exhaust conduit and 2) pumping water from the water tank to the injector for flushing residual reagent from the injector.

An exhaust aftertreatment system for use with an automotive diesel engine, the system includes a selective catalytic reduction unit a reagent storage tank, and a reagent distribution system. A reagent fluid is stored in the reagent storage tank. The reagent is delivered to exhaust gases produced by the engine using the reagent distributor. The selective catalytic reduction unit is positioned downstream of the reagent distributor and is configured to remove effluents from the exhaust gases.

An internal combustion engine system includes: an internal combustion engine mounted on a vehicle; a NOx selective reduction catalyst; a reducing agent supply device including a urea water addition valve configured to add urea water into the exhaust gas passage upstream of the NOx selective reduction catalyst, a urea water tank, a urea water flow passage that connects the urea water addition valve and the urea water tank, and a pump configured to supply the urea water addition valve with the urea water from the urea water tank; and a control device. The control device is configured to perform a runoff reduction control that controls at least one of the reducing agent supply device and the internal combustion engine such that the amount of runoff of the urea water from the urea water tank becomes less when the tilt angle of the vehicle is large than when it is small.

A method and device for controlling a delivery device for an aqueous urea solution in a motor vehicle, with a tank, with a suction line, with a pump, with a pressure line, and with an injector, wherein the aqueous urea solution can be conveyed from the tank along the suction line, through the pump, through the pressure line, and to the injector. The method performs a rinsing procedure of at least the pressure line, wherein the pump is operated counter to its usual conveying direction during the rinsing procedure and the injector is closed in a first phase of the method, wherein the pump is operated for an operating duration t1 and at a speed of rotation n1 during the first phase of the method.

An exhaust aftertreatment system for use with an automotive diesel engine, the system includes a selective catalytic reduction unit a reagent storage tank, and a reagent distribution system. A reagent fluid is stored in the reagent storage tank. The reagent is delivered to exhaust gases produced by the engine using the reagent distributor. The selective catalytic reduction unit is positioned downstream of the reagent distributor and is configured to remove effluents from the exhaust gases.

A method for operating a feed module of an SCR catalytic converter system which has a feed pump, a feedback pump and a hydraulic interface channel. The feed module is operated in a test state in which a feed operation of the feed pump takes place and a feed operation of the feedback pump does not take place. Owing to a time profile of an MSP current (I.sub.MSP) of the feed pump it is decided in the test state whether the feed module is to change into a thawing state.