Robert Bosch

Achim Knittel

Martin Kiontke

Stephan Pohl

Jochen Winkler

Ulrich Meingast

Juergen Krueger

Martin Murst

Thorsten Rankel

Claudius Henkel

Thilo Kreher

Gellert Elsoe

The invention relates to a metering device () for introducing a process liquid or auxiliary agent into a flow pipe of an internal combustion engine, in particular for introducing a reducing agent into an exhaust gas pipe (). Said device comprises an injection valve () and a receiving device () comprising a heat sink element () and a cover element (). The injection valve () and the receiving device () are combined to form a structural unit by means of bonded connections ().

Metering module for metering a reducing agent

The invention relates to a device for cooling a metering module, in particular a module for metering an operating agent/auxiliary agent such as a reducing agent into the exhaust gas system of an internal combustion engine. A cooling device through which a cooling fluid flows is associated with the metering module (). An outer surface () of the metering module () is enclosed by a cooling member () through which the cooling fluid flows. The multi-part cooling member () comprises drainage openings () for discharging () the cooling fluid/for discharging liquids in order to prevent said fluid/liquids from accumulating on the bottom of the cooling member ().

Cooling device with drainage openings for a metering valve

The invention relates to a metering module () for metering a reduction means in an exhaust system of an internal combustion engine. The metering module () comprises at least one cooling element () through which cooling fluid flows. The metering module () has a cooled connection piece () that is actively cooled by the cooling fluid.

Cooling device for connection piece

The invention relates to a device for cooling a metering module () for dispensing a process liquid/auxiliary agent into the exhaust gas system of an internal combustion engine. The metering module () comprises a housing () with a plurality of housing sections (), (), (), (). A first housing section (), (), on which a supply line () for the process liquid/auxiliary agent is located, is situated in a region () of the metering module () that is exposed to varying temperatures, said section being made of metal.

Metering module with high-temperature resistance

The invention relates to a device for cooling a metering module (), in particular a module for metering an operating agent/auxiliary agent such as a reducing agent into the exhaust gas system of an internal combustion engine. A cooling device comprising a cooling member () through which a cooling liquid flows is associated with the metering module (). The cooling member () acts as a housing () for the metering module (). A first group of parts () forms an air gap insulation () on an electric contact (), while cooling fluid flows through a second group of parts ().

Metering module featuring air gap insulation

The invention relates to a dosing module () for injecting a reduction agent, in particular a urea-water solution, into an exhaust pipe of an internal combustion engine, in particular of a self-igniting internal combustion engine, to reduce nitrogen oxides in the exhaust stream, wherein the dosing module has a main cooling element () through which a cooling liquid flows, in particular for cooling an injection valve () for the reduction agent. According to the invention, an additional cooling element (), through which the cooling liquid likewise flows, in particular for cooling in the region of an electrical plug connection () and of an electromagnet () for actuating the injection valve (), is placed on the basis cooling element (), wherein a guide insert () for the cooling liquid is arranged in the main cooling element (). As a result of the guide insert (), priority cooling of the end section () of the injection valve () which is in direct contact with the hot exhaust stream of the internal combustion engine occurs. According to the invention, reliable operation of the dosing module () is ensured, even at ambient temperatures of 160&#xb0; C. and above.

Dosing module

The invention relates to a dosing module () for metering a reducing agent into an exhaust system of an internal combustion engine. Said dosing module () comprises at least one cooling member () through which a cooling fluid flows that is used to cool the internal combustion engine. An electric contact () is located in the top region of the dosing module (). The dosing module () is enclosed in a full housing () that comprises an upper and a lower cooling member () through which a directed cooling fluid stream () flows that runs from the valve tip region () in the direction of the electric contact ().

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Ditzingen, Germany

Achim Knittel