Exhaust treatment device facilitating through-wall flow

摘要

A method of manufacturing an emissions treatment device for an internal combustion engine includes disposing washcoated fibers between layers of a porous substrate to form multiple substantially parallel layers with a first group of layers at least partially open along the entire length of the layer. The porous substrate may be a stainless steel mesh with the method further including washcoating the substrate prior to disposing the washcoated fibers between the layers.