| abstract |
Lean NO x trap (LNT); Pre has a NO x storage and reduction zone in the upper 40% or more - a wall flow type monolithic substrate having a coating porosity, the NO x storage and reduction zone above the first support, and comprising a platinum-group metal loaded on the first support Comprises at least one noble metal oxide selected from the group consisting of at least one alkaline earth metal compound, mixed magnesium / aluminum oxide, cerium oxide, and copper oxide, manganese oxide, iron oxide and zinc oxide. The present invention relates to an exhaust system for an internal combustion engine. |