Exhaust gas purifying apparatus and method for purifying exhaust gas
AssigneeIbiden Co., Ltd.
InventorsKazutake Ogyu, Kenichi Makino
Life of this patent
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Abstract
An exhaust gas purifying apparatus includes a metal casing and a honeycomb filter installed in the metal casing. The honeycomb filter includes cells, a first end face, and a second end face. The cells include a first cell and a second cell provided alternately. The first cell includes an open end on the first end face side and a sealed end on the second end face side. The second cell includes an open end on the second end face side and a sealed end on the first end face side. A cross-sectional area of the first cell is smaller than a cross-sectional area of the second cell. The first end face is disposed on a gas inlet side of the metal casing. The second end face is disposed on a gas outlet side of the metal casing.
Claims42
An exhaust gas purifying apparatus comprising:
- a metal casing comprising a gas inlet side and a gas outlet side;
- and
- a honeycomb filter installed in said metal casing and comprising cell walls, a first end face, and a second end face, the cell walls extending along a longitudinal direction of the honeycomb filter to define a plurality of cells between the cell walls, said plurality of cells comprising:
- a first cell and a second cell provided alternately;
- said first cell comprising an open end on a side of said first end face and a sealed end on a side of said second end face;
- said second cell comprising an open end on aside of said second end face and a sealed end on a side of said first end face;
- and
- a cross-sectional area of said first cell perpendicular to said longitudinal direction being smaller than a cross-sectional area of said second cell perpendicular to said longitudinal direction, said first end face of the honeycomb filter being disposed on said gas inlet side of said metal casing, and said second end face of the honeycomb filter being disposed on said gas outlet side of said metal casing.
A method for purifying an exhaust gas, said method comprising:
- introducing the exhaust gas emitted from an engine into an exhaust gas purifying apparatus from a gas inlet side of a metal casing of said exhaust gas purifying apparatus;
- and
- discharging the exhaust gas from a gas outlet side of said metal casing,
- said exhaust gas purifying apparatus comprising:
- a honeycomb filter installed in said metal casing and comprising cell walls, a first end face, and a second end face, the cell walls extending along a longitudinal direction of the honeycomb filter to define a plurality of cells between the cell walls, said plurality of cells comprising:
- a first cell and a second cell provided alternately;
- said first cell comprising an open end on a side of said first end face and a sealed end on a side of said second end face;
- said second cell comprising an open end on a side of said second end face and a sealed end on a side of said first end face;
- and
- a cross-sectional area of said first cell perpendicular to said longitudinal direction being smaller than a cross-sectional area of said second cell perpendicular to said longitudinal direction, said first end face of the honeycomb filter being disposed on said gas inlet side of said metal casing, and said second end face of the honeycomb filter being disposed on said gas outlet side of said metal casing.
Dependencies are inferred from the claim text.