초록 ▼

Described is an exhaust gas cleaning metallic substrate of the structure that three metallic honeycomb bodies are successively arranged within a metallic casing. Among the three metallic honeycomb bodies, (i) the metallic honeycomb bodies at front and rear positions have each been constructed by fix

Described is an exhaust gas cleaning metallic substrate of the structure that three metallic honeycomb bodies are successively arranged within a metallic casing. Among the three metallic honeycomb bodies, (i) the metallic honeycomb bodies at front and rear positions have each been constructed by fixing a planar and corrugated bands as constituent members of said metallic honeycomb body at at least some of points of contact therebetween and also an outer peripheral wall of the metallic honeycomb body and an inner peripheral wall of the metallic casing at at least some of points of contact therebetween, and (ii) the metallic honeycomb body at a middle position has been constructed without fixing a planar and corrugated bands as constituent members of said metallic honeycomb body at points of contact therebetween and also an outer peripheral wall of the metallic honeycomb body and an inner peripheral wall of the metallic casing at points of contact therebetween.

대표청구항 ▼

An exhaust gas cleaning metallic substrate of the structure comprising three separate metallic honeycomb bodies for supporting thereon an exhaust gas cleaning catalyst, each of the metallic honeycomb bodies having a honeycomb structure composed of a planar band and a corrugated band made of metal sh

An exhaust gas cleaning metallic substrate of the structure comprising three separate metallic honeycomb bodies for supporting thereon an exhaust gas cleaning catalyst, each of the metallic honeycomb bodies having a honeycomb structure composed of a planar band and a corrugated band made of metal sheets, and being sequentially arranged in a flowing direction of exhaust gas within a metallic casing so that the three metallic honeycomb bodies occupy front, middle and rear positions, respectively, wherein: (i) the metallic honeycomb bodies at front and rear positions have a construction whereby at least some of the points of contact between the planar and corrugated bands of each of the front and rear position metallic honeycomb bodies are fixed together and at least some of points of contact between an outer peripheral wall of each of the front and rear position metallic honeycomb bodies and an inner peripheral wall of the metallic casing are fixed together; and (ii) wherein the metallic honeycomb body at the middle position has a construction whereby the planar and corrugated bands of said middle position metallic honeycomb body are not fixed together and an outer peripheral wall of the metallic honeycomb body and an inner peripheral wall of the metallic casing are not fixed together.