Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1980-12-11
1982-07-13
Casaregola, L. J.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60275, 60279, F01N 300
Patent
active
043387845
ABSTRACT:
The method and apparatus for controlling particulate emissions from a combustion apparatus, as a diesel engine. Diesel engine exhaust particles are electrically charged during the formation of the particles in the engine combustion chamber. A particle collector is used to collect the electrically charged particles on collecting structures connected to a high voltage power supply and ground. The collecting structures of the particle collector can be a plurality of parallel metal plates, spaced cylindrical rods, or concentrically located cylindrical members. A fibrous matrix can be located adjacent the particle collecting structure to collect the charged particles as they move through the matrix. In one embodiment, the collected particles separate from the collecting structures and return to the engine intake. In another embodiment, a removable collecting cartridge has electrically conductive plates for collecting the charged particles. The entire cartridge is removed for cleaning or replacement. The hot exhaust gas from the engine can be used to oxidize the collected particles. The collected particles that are not oxidized can be separated from the collecting structures and re-entrained into the gas. The re-entrained particles are larger than the particles formed in the combustion apparatus. The large particles can be removed by a downstream particle collection device or mixed with fuel for the engine.
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Dolan Daniel F.
Kittelson David B.
Liu Benjamin Y. H.
Pui David Y. H.
Casaregola L. J.
The Regents of the University of Minn.
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