HIGH-EFFICIENCY METAL CARRIER BODY FOR EXHAUST GAS CLEANING CATALYST

摘要

Disclosed herein is an exhaust gas cleaning device which is suitable for arrangement at an intermediate point in an exhaust gas system of an automotive vehicle and has good efficiency. The exhaust gas cleaning device includes a metal-made carrier body for an exhaust gas cleaning catalyst. The carrier body is composed of a multi-layered composite body by superposing one over the other at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and defining many network-patterned gas flow passages along a central axis thereof to allow an exhaust gas to axially flow as streams through the gas flow passages. At least one of the bands defines many holes and many raised portions, preferably, ridges around or near the respective holes. As an alternative, at least one of the bands is made of a metal wire net.