Robert Boschgmbh

Markus Buerglin

Dirk Heilig

Wolfgang Ripper

Johannes Schaller

Martin Braun

Thorsten Mayer

Michael Offenhuber

Matthias Burger

Markus Gloeckle

Ulrich Meingast

Dirk Von Meduna

Stefan Fischer

Ilona Ullmann

Martin Czasch

Sebastian Kaefer

Gudrun Bieder

Franz-Josef Trompeter

Bruno Zeyer

Matthias Kruse

Thomas Prasser

Vera Lindemer

Goetz Flender

An injection module () for injecting a reducing agent into the exhaust system () of an internal combustion engine () has at least two outlet openings () for discharging at least one reducing agent primary jet (), the outlet openings () being designed in such a way that that the reducing agent primary jets () exiting the outlet openings () collide and create a spray mist () in the exhaust system ().

Injection module and exhaust system having an injection module

A method of metering a fluid, pollutant-reducing medium, in particular an aqueous urea solution, into a motor vehicle exhaust system is proposed, in which the fluid medium is delivered to a nozzle module, in particular a nozzle or a valve, and introduced into the exhaust system by the nozzle module. A transport system arranged upstream of the nozzle module is activated with pulse-width modulation. The method and the associated metering system ensure that, in particular, a reducing agent is arranged or metered precisely and in a robust manner relative to degrees of coldness, with the use of few components.

Method and metering system for reducing pollutants in motor vehicle exhaust gases

The invention proposes a method for metering a reagent, in which the reagent is sprayed into a spray tube () via an electrically activated metering valve (), and is mixed in the spray tube () with compressed air, and in which the reagent mixed with compressed air is introduced by means of the spray tube () into an exhaust gas duct () and is atomized, and a device for carrying out the method. The procedure according to the invention is distinguished in that the duration of the metering valve activation signal () is corrected depending on the differential pressure between the hydraulic pressure (p_Rea_hyd) of the reagent in the metering valve () and the pneumatic pressure (p_D_pneu) in the spray tube (). The procedure according to the invention permits a high degree of accuracy in the metering of the reagent.

Method for metering a reagent into an exhaust gas duct and device for carrying out the method

The invention relates to an ammonia tank of an exhaust gas treatment system of a vehicle, having a tank wall. The invention provides that the tank wall is surrounded by a reagent reacting with regard to ammonia.

Ammonia tank of an exhaust gas treatment system of a vehicle

The invention relates to a device for supplying a reducing agent into an exhaust system of an internal combustion engine. The device includes a delivery pump for delivering the reducing agent from a storage tank into an exhaust tube of the exhaust system. A metering device is provided between the delivery pump and the exhaust tube, which metering device supplies reducing agent, which is delivered continuously by the delivery pump, in an intermittent fashion into the exhaust tube.

Device for delivering a reducing agent to an exhaust system of an internal combustion engine

A metering device for introducing an operating medium into an exhaust manifold of an internal combustion engine, the device comprising a cooling system for cooling an injector module of the metering device. The cooling system is provided with a cooling circuit encompassing at least one cooling fluid and at least one cooling device which dissipates heat from the cooling circuit. A first portion of the cooling circuit is disposed at least in part below the cooling device and/or a second portion of the cooling circuit is located at least in part above a point that heats the cooling circuit, especially above the injector module.

Metering device and internal combustion engine having a metering device

A medium supply system of an exhaust gas cleaning device for treating the exhaust gas of an internal combustion engine comprising a storage tank and a supply line which is connected to the storage tank for supplying the medium to a dosing unit connected to an exhaust pipe and to a recycling line for recycling the medium to the storage tank. The supply line and/or the recycling line are provided with at least one conduit area comprising at least one first and second parallel partial channels for the medium circulation, wherein said partial channels exhibit different insulation properties. An exhaust gas cleaning device comprising the inventive supply system and a method for the operation thereof are also disclosed.

Supply system for a medium for treating exhaust gases of an internal combustion engine; exhaust gas cleaning device; and a method for operating a supply system

The invention relates to a dosing system comprising a dosing means for metering a liquid, especially an aqueous urea solution used for the after treatment of exhaust gases generated by combustion engines. The liquid can be conveyed from a reservoir into an exhaust manifold through the dosing means in a normally operating conveying device. According to the invention, at least one area that is located between a dosing point and the reservoir and is impinged upon by the liquid can be emptied counter to a normal transport direction of the liquid.

Metering system and method for operating a metering system

The invention relates to a metering system for injecting pollutant reducing medium into an exhaust system includes a metering pump, and at least one self-opening nozzle for injecting fluidic media into the exhaust gas system. The nozzle is self-opening with a needle chamber, a nozzle needle and a spring chamber with a spring element. The needle chamber and spring chamber are separated by a flexible membrane which prevents fluidic media from escaping from the needle chamber into the spring chamber, and also permits an excess pressure to prevail in the needle chamber in relation to the spring chamber, causing the nozzle needle to be displaced in opposition to a spring force, thus releasing a nozzle opening. The inventive metering system is cost-effective, robust and can also be used at low operating temperatures.

Metering system for reducing pollutants in motor vehicle exhaust gases

Apparatus for storing and metering of reducing agents that may be used within the framework of a catalytic exhaust gas aftertreatment, having a device for storing the reducing agent to be metered and a metering device for applying the reducing agent to the exhaust gas to be treated, the device for storing the reducing agent having an outer container and a cartridge, containing the reducing agent, that is able to be exchangeably positioned in it.

Method and device for storing and dosing a reducing agent

A method and a device for treatment of the exhaust of an internal combustion engine in which a fluid is used as an auxiliary agent for the treatment; a partial chemical conversion of the auxiliary agent is at least occasionally stimulated in order to produce a substance that reduces the freezing point of the fluid when the temperature of the fluid falls below a critical value.

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Ditzingen, Germany

Markus Buerglin