Soot filter for cleaning the exhaust from an internal combustion

Details Soot filter for cleaning the exhaust from an internal combustion Soot filter for cleaning the exhaust from an internal combustion

1990-04-30

1991-08-27

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

55466, 55520, 55DIG30, 60303, 60311, 422171, 422180, F01N 302

Patent

active

050422499

ABSTRACT:
A soot filter has sets of three to five filter tubes disposed in a circle and axially parallel to one another, through which exhaust flows radially from the outside in during operation, composed of refractory ceramic yarn wound spool-wise to form hollow cylinders. To permit an electrical burn-off of the deposited soot with a relatively low expenditure of energy, the clearance A of all adjacent filter tubes 30 from one another amounts to 2 to 4% of the average filter tube diameter D. In each interstice 36 formed by at least three filter tubes 30 an elongated electrical heating element 37 is disposed which can be turned on if the exhaust gas stream is interrupted by shutting down the internal combustion engine or by diverting the exhaust gas stream away from a set of filter tubes.

REFERENCES:
patent: 4276066 (1981-07-01), Bly et al.
patent: 4324572 (1982-04-01), Erdmannsdoerfer et al.
patent: 4436535 (1984-03-01), Erdmannsdoerfer et al.
patent: 4478618 (1984-10-01), Bly et al.
patent: 4811559 (1989-03-01), Henkel
patent: 4829766 (1989-05-01), Henkel
patent: 4872889 (1989-10-01), Lepperhoff et al.
patent: 4897096 (1990-01-01), Pischinger

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