Caterpillar Inc.
Emissions module with adjustable sizing

Abstract:

An emission module for treating exhaust gas including a housing, a first catalyst substrate positioned within the housing and having an inlet end, the first catalyst substrate defining a plurality of flow passages extending longitudinally from the inlet end, and a first restrictor plate positioned at the inlet end of the first catalyst substrate to block exhaust flow through a first portion of the plurality of flow passages while allowing exhaust flow through the remainder of the plurality of flow passages.