Honeycomb structure body and exhaust gas purification filter
AssigneeDenso Corporation
InventorHiroaki Kayama
Life of this patent
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Abstract
A honeycomb structure body has an outer skin, cells arranged in an inside of the outer skin, and partition walls having pores. The partition walls are arranged in the inside of the outer skin. Each of the cells is surrounded by the partition walls. The pores have communicating pores which communicate with each other adjacent cells. Exhaust gas emitted from an engine passes adjacent cells through the communicating pores. The number of the communicating pores is at a density of not less than 18000 [pores/0.25 mm2] before a catalyst is supported in the pores. An exhaust gas purification filter having the honeycomb structure body with the catalyst is arranged in an exhaust gas pipe to purify exhaust gas containing PM emitted from an engine.
Claims16
A honeycomb structure body comprising:
- an outer skin;
- a plurality of cells arranged in an inside of the outer skin;
- and
- a plurality of partition walls comprising pores,
- the partition walls arranged in the inside of the outer skin and forming the plurality of cells,
- the pores comprising communicating pores, which communicate with adjacently located cells and through which exhaust gas passes between the adjacently located cells, and the communicating pores have a density at not less than 18000 [pores/0.25 mm2].
An exhaust gas purification filter comprising a honeycomb structure body and catalyst, wherein
- the honeycomb structure body comprises:
- an outer skin;
- a plurality of cells arranged in an inside of the outer skin;
- and
- a plurality of partition walls comprising pores, arranged in the inside of the outer skin and forming the plurality of cells, the pores comprising communicating pores, which communicate with each other adjacently arranged cells and through which exhaust gas passes between the adjacent cells, and
- wherein
- the catalyst is supported on pore walls of the communicating pores,
- the pore walls support the catalyst at not less than 30 g/liter, and
- after the catalyst has been supported on the pore walls, the communicating pores which are not clogged with the catalyst have a density at not less than 4500 [pores/0.25 mm2].
Dependencies are inferred from the claim text.