Exhaust gas system for an internal combustion engine
AssigneePurem GmbH
InventorPeter Kast
Life of this patent
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Abstract
An exhaust gas system for an internal combustion engine includes an exhaust gas treatment unit, an exhaust gas guide conducting exhaust gas to the exhaust gas treatment unit and a reactant discharge unit for the discharge of reactant into the exhaust gas guide. The exhaust gas guide includes an outer pipe and an inner pipe in a longitudinal region between the reactant discharge unit and the exhaust gas treatment unit. An external volume through which exhaust gas can flow and an internal volume through which exhaust gas can flow in the inner pipe are provided.
Claims12
An exhaust gas system for an internal combustion engine, the exhaust gas system comprising:
- an exhaust gas treatment unit;
- an exhaust gas guide for conducting exhaust gas to said exhaust gas treatment unit;
- a reactant discharge unit for discharging reactant into said exhaust gas guide;
- said exhaust gas guide including an outer pipe and an inner pipe arranged in a longitudinal region between said reactant discharge unit and said exhaust gas treatment unit;
- said outer pipe and said inner pipe conjointly defining an external volume wherethrough a first component of said exhaust gas can flow and said inner pipe defining an internal volume wherethrough a second component of said exhaust gas can flow;
- wherein the inner pipe has an inner pipe longitudinal axis and extends so as to be wound in a helical manner in the direction of said inner pipe longitudinal axis extending in a linear manner.
Dependencies are inferred from the claim text.