Emitec Gesellschaft Fuer Emissionstechnologie Mbh

Deutz Aktiengesellschaft

Continental Automotive Gmbh

Emitec Gesellschaft Fur Emissionstechnologie Mbh

Ulf Klein

Rolf Brück

Peter Hirth

Thomas Härig

Marc Brugger

Meike Roos

Meike Wittrock

Gerald Leyh

Joachim Joisten-pieritz

Andreas Steinhausen

Markus Winkler

An internal combustion engine, including at least one exhaust-gas line having at least one device for the after-treatment of the exhaust gas and at least one urea-water solution tank, whereby the urea-water solution tankis located close to the engine, is provided.

Internal combustion engine

A method in which the exhaust gas that is to be purified is passed through an exhaust-gas line containing a diesel oxidation catalyst (DOC) for the oxidation of residual gaseous hydrocarbons (HC) and carbon monoxide (CO) in order to form carbon dioxide (CO) and for the at least proportional oxidation of the nitrogen monoxide (NO) contained in the exhaust gas in order to form nitrogen dioxide (NO) is provided.

Method for the purification of diesel engine exhaust gases

A device and method for providing a gaseous substance mixture which includes at least one reducing agent and/or at least one reducing agent precursor, includes a reservoir for an aqueous solution which includes at least one reducing agent precursor that can be flow connected to an evaporator chamber, and a device for dosing the aqueous solution in the evaporator chamber. A device can heat the evaporator chamber to a temperature higher than or equal to a critical temperature, in which the aqueous solution is at least partially evaporated. The device and method enable reducing agent to be provided for selective catalytic reduction of nitrogen oxides in the exhaust of an internal combustion engine. Preferably, an evaporator unit is configured as the evaporator chamber and a hydrolysis catalytic converter is disposed outside the exhaust system. As a result, the size of the hydrolysis catalytic converter is reduced, allowing compact construction.

Method and device for providing a gaseous substance mixture

A device and a method for providing a gaseous substance mixture including at least one of a reducing agent and/or a reducing agent precursor, include a reservoir for an aqueous solution including at least one reducing agent precursor, from which the aqueous solution can be delivered into at least one metering line having a dispensing opening by a delivery device, and a device for heating the metering line above a critical temperature greater than the boiling temperature of water. Complete evaporation of an aqueous solution including urea and subsequent hydrolysis to form a substance mixture including ammonia, are carried out. The substance mixture is metered as a reducing agent into an SCR catalytic converter. Carrying out the evaporation outside the exhaust system uses considerably smaller hydrolysis catalytic converters, which is space-saving and cost-saving compared to conventional devices for providing a reducing agent for selective catalytic reduction of nitrogen oxides.

A method and apparatus for adding a reactant to an exhaust gas from an internal combustion engine is based on the principle of dividing the exhaust gas stream into an inner exhaust gas flow and an outer exhaust gas flow, which radially surrounds the inner exhaust gas flow. A swirl is imparted to the outer exhaust gas flow and then the reactant is added to the inner exhaust gas flow. The method and apparatus advantageously enable the reactant, in particular a reducing agent precursor and/or a reducing agent, preferably urea, in particular in aqueous solution, to be introduced into the exhaust system of the internal combustion engine without the formation of undesirable by-products, such as for example biuret, as a result of contact between the reactant and the usually relatively cool outer tubular casing of the apparatus.

Growing community of inventors

Much, Germany

Ulf Klein