Exhaust gas purification device

Details Exhaust gas purification device Exhaust gas purification device

2005-05-31

2005-05-31

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By sorber or mechanical separator

C060S274000, C060S301000

Reexamination Certificate

active

06898930

ABSTRACT:
There is provided an exhaust gas purification device (22) comprising a substrate used for purifying components contained in an exhaust gas discharged from an engine. The substrate has partitions (54) which define passages (50,51) and are formed of porous material having fine pores each having a predetermined average size. The end portions of the adjacent partitions (54) defining each of part of the passages (50,51) of the substrate are partially connected to each other such that the end portions (52,53) are tapered toward the outside of the substrate. The tapered end portions partially close the end opening of the corresponding passage and form a small hole (55,56) defined by the tips thereof. The size of each small hole (55,56) is smaller than the cross sectional area of the corresponding passage (50) and larger than the sizes of the fine pores of the partitions (54).

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