Patent ID: 7481041

Claim:
An exhaust system for a mobile combustion engine, comprising: an air intake pipe at least one exhaust pipe for exhaust gas, said at least one exhaust pipe having at least one catalytically active reaction chamber for cracking long-chain hydrocarbons contained in the exhaust gas, in said reaction chamber, wherein after flowing through said reaction chamber the exhaust gas contains only short-chain hydrocarbon molecules having fewer than 10 carbon atoms; and a valve, said at least one reaction chamber being disposed upstream of said valve in a direction of flow of the exhaust gas; said valve and said reaction chamber being part of an exhaust gas recirculation system having an exhaust gas recirculation pipe, said exhaust recirculation pipe distributing exhaust gas into said air intake pipe, said valve regulating a flow of exhaust gas through said exhaust gas recirculation pipe.