Vehicle exhaust after treatment system

摘要

A vehicle exhaust after treatment system for controlling emissions from an engine (6) includes, in serial order: an exhaust outlet (11) from the engine, an exhaust catalyst assembly (12) that is in fluid communication with the exhaust outlet (11) and includes a first NO x component (12a) coupled with a downstream oxidation catalyst (12b), and a second NO x adsorber (14) that is downstream from and in fluid communication with the oxidation catalyst (12b) of the exhaust catalyst assembly (12).