MANAGEMENT OF THERMAL FLUCTUATIONS IN LEAN NOX ADSORBER AFTERTREATMENT SYSTEMS

摘要

A method and apparatus for managing heat in exhaust gas in an aftertreatment system that uses a lean NOx adsorber (16) is disclosed. A de-sulfation hot line (49) and cooling line (12a) are used to control exhaust gas temperatures for adsorption, regeneration and de-sulfation cycles of the aftertreatment system where each cycle may require different chemical and exhaust gas temperatures independent of the engine operation. The method and apparatus includes a SOx adsorber (100) to provide greater durability for the subject invention.