Filter for cleaning the exhaust gases from diesel engines

Details Filter for cleaning the exhaust gases from diesel engines Filter for cleaning the exhaust gases from diesel engines

1987-12-03

1989-08-15

Nozick, Bernard

Gas separation

Specific media material

Ceramic or sintered

55DIG30, 60311, B01D 4600

Patent

active

048570885

ABSTRACT:
In filters for cleaning the exhaust gases from diesel engines having openpored foam ceramic bodies, the deposited soot particles are burned up at temperatures of between 550.degree. and 700.degree. C. at periodic intervals. In order to lower the inflammation temperature of the soot in the regeneration phase of the filter, the ceramic bodies are catalytically coated.
The region of the openpored foam ceramic body first subjected to the flow of the exhaust gases of the diesel engines has at least partly a denser pore structure than the remaining foam body so that the inflammation temperature can be lowered since temperature peaks occur in these regions on account of increased soot deposits, which temperature peaks lead to inflammation of the soot located there and consequently burn up all the soot deposited in the filter.

REFERENCES:
patent: 4451441 (1984-05-01), Ernest et al.
patent: 4600562 (1986-07-01), Virk et al.
patent: 4632683 (1986-12-01), Fukutani et al.

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