Air Cleaner Assembly for an Internal Combustion Engine

An air cleaner assembly () for an internal combustion engine, has a housing () with at least one intake air inlet and at least one intake air outlet () formed in the housing wall () for supplying an intake air to the internal combustion engine, at least one filter element disposed within the housing () for filtering the intake air, separating a rough air side from a clean air side inside the housing (), and at least one flow straightener insert () comprising a body structure () with a hydrocarbon absorbing medium () disposed at the clean air side of the filter element. The at least one outlet () accommodates the at least one flow straightener insert ().