Exhaust gas system for purifying exhaust gases of gasoline engine
AssigneeUmicore AG & Co. KG
InventorsJan SCHOENHABER, Joerg-Michael RICHTER, Carolin BRAUN, Tim PALM
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Abstract
The invention is directed to the purification of exhaust gases of an internal combustion engine operated predominantly with a stoichiometric fuel mixture. The exhaust system has in particular 4 purification functions in a particular order. A three-way catalyst (TWC1) near the engine is followed by a gasoline particle filter (GPF) and another three-way catalyst (TWC2) downstream thereof. The system additionally includes an ammonia storage function.
Claims10
An exhaust gas purification system for purifying exhaust gases of a predominantly stoichiometrically operated internal combustion engine having a TWC1 near to the engine on a flow-through substrate, a GPF attached downstream of the TWC1 as a wall-flow filter and another TWC2 on a flow-through substrate downstream of the GPF,
- characterized in that
- the system additionally has materials for temporary storage of ammonia, wherein the materials for temporary storage of ammonia are arranged on a separate flow substrate and the latter is arranged downstream of the TWC2.
(canceled)
Dependencies are inferred from the claim text.