Volkswagen Ag

Markus Paulovsky

Alf Degen

Jörg Theobald

Onur Ulas Car

Valeri Seiler

Nils Lindenkamp

Jakob Erfurt

Jörg-Dieter Baetge

Peter Männel

Ines Schulze

The invention relates to an exhaust gas aftertreatment system for an internal combustion engine comprising a first catalytic converter that has a first exhaust gas inlet to admit the exhaust gas into the first catalytic converter and has an exhaust gas outlet positioned on the opposite side, also comprising a second catalytic converter that is arranged downstream from the first catalytic converter and that is flow-connected to the first catalytic converter in order to allow the exhaust gas to pass from the first catalytic converter into the second catalytic converter and that likewise has a second exhaust gas inlet that is at a physical distance from the exhaust gas outlet of the first catalytic converter. The exhaust gas aftertreatment system also comprises a particulate filter that is arranged downstream from the second catalytic converter and that is flow-connected to the second catalytic converter in order to allow the exhaust gas to pass from the second catalytic converter into the particulate filter. A flow-around area is formed adjacent to an outer surface of the first catalytic converter in which the exhaust gas flows from the exhaust gas outlet to the second exhaust gas inlet into the second catalytic converter.

Exhaust gas aftertreatment system for an internal combustion engine

A particulate filter for exhaust-gas aftertreatment in an internal combustion engine has a housing on which an inlet and an outlet are configured on opposite ends. The particulate filter also has a filter element arranged in the housing, said filter element having essentially parallel filter channels that are each alternatingly closed on the inlet side or on the outlet side by a closure in order to prevent gas from passing directly through the filter element. In this context, the filter channels can be divided into a first group of filter channels which are closed on the outlet side by a closure, and into a second group of filter channels which are closed on the inlet side by a gas-tight closure. The filter channels of the second group are additionally closed on the outlet side by a high-porosity closure in order to improve the cleaning effect of the particulate filter.

Particulate filter for an internal combustion engine and method for producing such a particulate filter

The invention relates to an exhaust gas system () for an internal combustion engine (), having an exhaust gas path which includes at least in sections two parallel exhaust gas lines (), namely a main line () and an auxiliary line (), an adsorber () for reversible sorption of unburnt hydrocarbons (HC) and/or nitrogen oxides (NO) being situated in the auxiliary line (); having an adjusting means () for selectively guiding an exhaust gas flow into the main line () and/or into the auxiliary line () and having a main catalytic converter () situated downstream from the parallel exhaust gas lines (). An exhaust gas flow-conducting, gas-permeable element () is provided upstream from the adsorber (), which separates the auxiliary line () from the remaining exhaust gas flow-conducting areas. In addition, the adsorber () may also be equipped with a particle filtering function and/or a catalytic function.

Exhaust gas system with HC adsorber and parallel catalytic converter, and vehicle comprising such an exhaust gas system

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Wolfsburg, Germany

Markus Paulovsky