| 摘要 |
A catalytic converter has a honeycomb structure, a casing and a supporting mat. A reinforced section is formed in at least a second end section of the honeycomb structure, from which exhaust gas is discharged to the outside of the honeycomb structure. The reinforced section has a denser structure than a general section excepting a formation section of the reinforced section in the honeycomb structure. Exhaust gas is introduced into the inside of the honeycomb structure from the first end section. The exhaust gas is discharged from the second end section to outside of the honeycomb structure. A stepped section is formed in the reinforced section. The general section has a porosity within a range of 45 to 70%, and more preferably a range of 45 to 65%. The reinforced section has a porosity within a range of 5 to 35%.
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