NOx REDUCTION SYSTEM
AssigneePlastic Omnium Advanced Innovation and Research
InventorsJean-Francois BERARD, Anita KOUAKOU, Jules-Joseph VAN SCHAFTINGEN
Life of this patent
Estimating the term…
Abstract
A system and method for reducing the nitrogen oxides found in the exhaust produced by a vehicle engine, the system comprising a NOx trap and a first adding means for adding a reducing agent to the exhaust gas. The first adding means is positioned downstream of the engine and either upstream of or within the NOx trap.
Claims15
A system for reducing nitrogen oxides of an exhaust gas produced by an engine of a vehicle, the system comprising:
- a NOx trap;
- a first adding means for adding a reducing agent to the exhaust gas, the first adding means being positioned downstream of the engine and either upstream of or within the NOx trap;
- a first Selective Catalytic Reduction unit, the first Selective Catalytic Reduction unit being located downstream of the NOx trap;
- wherein the reducing agent is ammonia.
A controller configured to:
- receive data indicative of a measured parameter in an exhaust system;
- and
- control adding a reducing agent upstream of a NOx trap or within a NOx trap and downstream of an engine based on the received data.
A method for reducing nitrogen oxides of an exhaust gas produced by an engine, the method comprising:
- storing nitrogen oxides produced by an engine in a NOx trap positioned downstream of the engine;
- adding a reducing agent into the exhaust gas upstream of or within the NOx trap and downstream of the engine;
- and
- using this reducing agent to reduce the NOx absorbed in the NOx trap and purge the NOx trap.
Dependencies are inferred from the claim text.