Daimler Chrysler Ag

Daimler Ag

Detlef Scharr

Bernd Krutzsch

Guenter Wenninger

Frank Duvinage

Walter Friess

Anton Kerckhoff

Tillman Braun

Alexander Funk

Steffen Digeser

Michel Weibl

In an exhaust gas system for an internal combustion engine, particularly of a motor vehicle, wherein the exhaust gas system comprises a nitrogen oxide reducing converter arranged in an exhaust gas line of the internal combustion engine, an exhaust gas cleaning device arranged upstream of the nitrogen oxide reducing converter and a reducing agent feed device for feeding a reducing agent into the exhaust gas of the internal combustion engine upstream of the nitrogen oxide reducing converter, a bypass line is provided which branches off from the exhaust gas line upstream of the exhaust gas cleaning device and rejoins the exhaust gas line at an entry point downstream of the exhaust gas cleaning device and upstream of the nitrogen oxide reducing converter.

Exhaust gas system, especially for an internal combustion engine of a motor vehicle

A multi-cylinder air-compressing injection-type internal-combustion engine having a nitric oxide adsorber catalyst and an exhaust gas return device. In order to increase the hydrocarbon fraction in the exhaust gas in front of an exhaust gas aftertreatment device during a regeneration phase and to reduce the oxygen content, exhaust gas pipes of the cylinders are divided into at least two flows, which extend separately from one another at least along a distance. An increased hydrocarbon emission is generated exclusively in the cylinders of one of the flows at times. Another of the flows is connected by way of the exhaust gas return device with an air intake pipe of the internal-combustion engine.

Multi-cylinder air-compressing injection-type internal-combustion engine

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Leutenbach, Germany

Detlef Scharr