Hyundai Motor Company

Kia Motors Corporation

Kia Motors Company

Dohyung Kim

Chang Hwan Kim

Nahm Roh Joo

ChangHo Jung

An after treatment system for a lean-burn engine is disclosed. The after treatment system is sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. An exhaust flow changer is disposed between the ammonia production catalyst module and the SCR catalyst. The exhaust flow changer changes flow of an exhaust gas discharged from the ammonia production catalyst module according to a temperature of the SCR catalyst.

After treatment system and after treatment method for lean-burn engine

An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. NHgeneration in the ammonia production catalyst module is changed according to a temperature and a temperature change rate of the SCR catalyst.

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Gyeongsangbuk-do, South Korea

Dohyung Kim