Exhaust gas filter, method of producing the same, and exhaust ga

Details Exhaust gas filter, method of producing the same, and exhaust ga Exhaust gas filter, method of producing the same, and exhaust ga

1998-04-21

2000-08-15

Spitzer, Robert H.

Gas separation

Specific media material

Ceramic or sintered

055DIG5, 055DIG10, 055DIG30, B01D 3920

Patent

active

061017930

ABSTRACT:
An exhaust gas filter having a ceramic filter body is configured such that a specific heat h (cal/g.degree. C.) of ceramic powder constituting the body, and a bulk specific gravity d (g/cm.sup.3) of the filter, satisfy the relation 0.12 (cal/cm.sup.3 .degree. C.).ltoreq.h.times.d.ltoreq.0.19 (cal/cm.sup.3 .degree. C.). The ceramic filter body includes a plurality of cells which extend axially to open at opposite ends of the body. One of the opposite axial ends of each of the cells is closed by a filler in such a manner that the closed ends of the cells and the open ends of the cells are arranged in an alternating configuration. The filter traps particulates in the exhaust gas, and the trapped particulates are removed by regeneration combustion of the filter. The filter exhibits excellent durability, thus preventing the formation of cracks in the surface and interior of the filter. When the filter is mounted on a diesel engine, the diesel engine advantageously does not discharge black smoke.

REFERENCES:
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patent: 4364761 (1982-12-01), Berg et al.
patent: 4759918 (1988-07-01), Homeier et al.
patent: 5223318 (1993-06-01), Faber et al.
patent: 5497620 (1996-03-01), Stobbe
patent: 5549725 (1996-08-01), Kasai et al.
patent: 5641332 (1997-06-01), Faber et al.
patent: 5700373 (1997-12-01), Ritland
patent: 5716559 (1998-02-01), Larsen et al.
patent: 5824220 (1998-10-01), Grangeon et al.
Abstract of U.S. Patent No. 4,364,761 issued Jun. 15, 1981.

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