Soot filtering unit for the exhaust of a diesel internal combust

Details Soot filtering unit for the exhaust of a diesel internal combust Soot filtering unit for the exhaust of a diesel internal combust

1988-05-20

1990-08-07

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

55312, 55313, 55314, 55466, 55DIG30, 60303, 60311, F01N 302

Patent

active

049457225

ABSTRACT:
A soot filtering unit in the exhaust gas system of a diesel internal combustion engine that includes at least two parallel soot filters. For regeneration, a regeneration device, having at least one burner and control flap, is provided upstream from the soot filters of the soot filtering unit. The burner(s) provided in the soot filtering unit supplies high temperature gases for the regeneration of the soot filters, and exhaust gas from the exhaust gas pipe is fed thereto as an oxygen carrier for the combustion process. According to a first embodiment, a single burner is provided for all soot filters to be regenerated and the burner does not lie directly in the pipes of the exhaust gas pipe that conveys exhaust gas to the soot filters. Preferably, exhaust gas is supplied to the burner(s) through separate exhaust gas feed pipes but, alternatively, a separate burner can be located directly in each branch of the exhaust pipe upstream of the respective soot filter provided therein. In the latter case, the burner can be supplied directly by a predetermined amount of exhaust gas being permitted to leak past the control flaps when they are closed.

REFERENCES:
patent: 4335574 (1982-06-01), Sato et al.
patent: 4345431 (1982-08-01), Suzuki et al.
patent: 4373330 (1983-02-01), Stark
patent: 4381643 (1983-05-01), Stark
patent: 4574589 (1986-03-01), Hasegawa
patent: 4720972 (1988-01-01), Rao
patent: 4730455 (1988-03-01), Pischinger

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