Robert Boschgmbh

Johannes Schaller

Wolfgang Ripper

Markus Buerglin

Thorsten Mayer

Georg Weber

Christian Walz

Ilona Ullmann

Cord Scharsack

Thomas Brinz

Bernd Mahr

Stefan Wickert

Horst Harndorf

Marc Bareis

Andreas Pfaeffle

Thomas Eh Walter

Frank Brenner

Matthias Loehr

Stefan Fischer

Hartmut Lueders

Ralf Schernewski

Dirk Heilig

Peter Khatchikian

Ulrich Meingast

Wolfram Veigel

Ulf-Peter Schmeling

Gudrun Bieder

Rudi Drefs

Viktor Pauli

Thomas Prasser

Horst Horndorf

A device and method for aftertreating exhaust gases in which a controllable valve is used to introduce a supplementary agent in fluid form into the exhaust system at high pressures. The high-pressure promotes an efficient mixture of the supplementary agent for the aftertreatment with the exhaust gas emerging from the internal combustion engine.

Device and method for aftertreating exhaust gases

A method and an apparatus for posttreatment of the exhaust gases of an internal combustion engines in which nitric oxides contained in the exhaust gas can be selectively catalytically reduced, and a first auxiliary agent kept on hand can be delivered to the exhaust gas, and means are provided for at least intermittently subjecting a portion of the first auxiliary agent to a chemical conversion into a second auxiliary agent, and an intermediate reservoir is provided for storing the second auxiliary agent, so that at least intermittently, the second auxiliary agent can be delivered to the exhaust gas parallel to or in alternation with the first auxiliary agent.

Method for after treatment of exhaust gases, and exhaust gas after treatment array

A method is provided for operating an internal combustion engine in whose exhaust-gas region an exhaust-gas treatment device is situated, and in which a reagent is introduced into the exhaust-gas region of the internal combustion engine. in addition, a device is provided for implementing the method. The reagent pressure occurring between a reagent safety valve and a reagent dosing valve, disposed directly in the exhaust-gas region is recorded during different states of the reagent safety valve and/or the reagent dosing valve and compared to at least one threshold value. If the threshold is exceeded, a fault signal is provided. This may offer high safety which may be of particular importance when fuel is used as reagent.

Method for operating an internal combustion engine and device for implementing the method

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

A method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine, and a device for implementing the method, which provide for an open-loop or closed-loop control of the reagent fill level in the catalytic converter to a predefined storage setpoint value. The targeted stipulation of the storage setpoint value ensures, on one hand, that in non-stationary states of the internal combustion engine, there is a sufficient quantity of reagent available for the completest possible removal of at least one unwanted exhaust-gas component, and on the other hand, a reagent slip is avoided.

Method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine and a device for implementing the method

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.

Device for treatment of exhaust of an internal combustion engine

A method and a system for regenerating, in particular desulfating, storage catalysts in the cleaning of exhaust gas from internal combustion engines. During the regeneration phase the combustion is controlled, initially inside the engine, by a control unit in such a way that the air ratio &#x3bb; in the exhaust gas is lowered to a first value &#x3bb;, and subsequently a feed device for the reducing agent is controlled by the control unit in such a way that the air ratio &#x3bb; is set at a second, lower value &#x3bb;&#x3c;1. This ensures that the temperatures occurring at the entry side of the storage catalyst are sufficient for effective desulfation without damaging the storage catalyst.

Method and system for regenerating, particularly desulfating, a storage-type catalytic converter during the purification of exhaust gases

An internal combustion engine of a motor vehicle has an adsorption catalyst which may be loaded with nitrogen oxides and unloaded. During the unloading, the exhaust-gas stream through the adsorption catalyst may be decreased by a control unit or an add-on device, using a valve. During the unloading, a fuel/air mixture may be added to the exhaust-gas stream reaching the adsorption catalyst, by the control unit or the add-on device, using an atomizer. Upon switching over from the unloading to the loading of the adsorption catalyst, the addition of the fuel/air mixture to the exhaust-gas stream is initially stopped by the control unit or the add-on device. The decreasing of the exhaust-gas stream is then ended after a predefined flushing time.

Method for operating an internal combustion engine, especially a motor vehicle internal combustion engine

A device and a method are described for controlling an internal combustion engine, in particular an internal combustion engine having an exhaust gas aftertreatment system. A parameter is determined which characterizes the intensity of a reaction in the exhaust gas aftertreatment system, starting from operating parameters which characterize the state of the internal combustion engine and/or the state of the exhaust gas aftertreatment system. When a threshold value is exceeded by the parameter, measures are introduced for reducing the reaction speed.

Method and device for controlling an internal combustion engine

A device is provided for the exhaust gas treatment of a combustion system, e.g., a diesel combustion system. The device has a first storage unit for storing at least one urea-water solution, and an exhaust gas treatment is implemented without great expenditure. According to the present invention, this result is achieved by the urea-water solution including at least one additive for chemically influencing the urea-water solution.

Device for exhaust gas treatment of a combustion system

A device and a method are proposed for the introduction of a processing agent downstream of the engine, in particular a fuel, into the exhaust-gas stream of an internal combustion engine, in which a gas discharge for boosting an at least partial of the supplied processing agent is supported.

Device and method for post-engine introduction of an auxiliary agent in an exhaust gas stream

A mixing device for mixing the exhaust gas of an internal combustion engine flowing in an exhaust pipe with a reducing agent as well as an exhaust gas purification system having such a mixing device, in which a mixing body is positionable in the exhaust pipe and which includes a gas impact surface and a spray impact surface so that exhaust gas flowing from the internal combustion engine is able to strike the gas impact surface and reducing agent, which is suppliable transversely to the exhaust gas flow, is able to strike the spray impact surface, the spray impact surface and the gas impact surface forming disjointed sub-areas of the surface of the mixing body. The mixing device distributes the reducing agent uniformly over the cross section of the exhaust pipe and mixes it uniformly with the exhaust gas.

Mixing device for an exhaust gas purification system

A method and a device are described for controlling an exhaust gas aftertreatment system for an internal combustion engine. A state variable is ascertained, which characterizes the state of the exhaust gas aftertreatment system. The temperature of the exhaust gas aftertreatment system is controlled as a function of the state of the exhaust gas aftertreatment system and/or of the internal combustion engine.

Method and device for controlling an exhaust gas aftertreatment system

A three-dimensional particle image velocimetry method is described, in which a stream system containing light-scattering particles is exposed continuously over a certain period or at least two discrete points in time using a laser lightsheet, and a hologram is produced and evaluated. Increased accuracy in determining velocity is achieved by evaluating the hologram with regard to its phase information interferometrically by using a reconstruction wave and superimposing a reference wave.

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Leonberg, Germany

Johannes Schaller