Division 4.3.4.1 Determination of durability performance of family members

A replacement pollution control device A within a family and intended to be mounted on an engine of displacement C_A may be considered to have the same aging factors as the parent replacement pollution control device P, determined on an engine of displacement C_P, if the following conditions are fulfilled:

V_A/C_A ≥ V_P/C_P

where:

both engines use the same method for regeneration of any emissions control devices incorporated in the original exhaust after-treatment system. This requirement shall apply only where devices requiring regeneration are incorporated in the original exhaust after-treatment system.

If these conditions are fulfilled, the emissions durability performance of other members of the family may be determined from the emissions results (S) of that family member determined according to the requirements set out in points 4.3.2.1, 4.3.2.2 and 4.3.2.3 and using the Aging Factors determined for the parent of that family.