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.
Type:
Grant
Filed:
December 11, 1980
Date of Patent:
July 13, 1982
Assignee:
The Regents of the University of Minn.
Inventors:
Benjamin Y. H. Liu, David B. Kittelson, Daniel F. Dolan, David Y. H. Pui
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.
Type:
Grant
Filed:
August 22, 1979
Date of Patent:
February 23, 1982
Assignee:
The Regents of the University of Minn.
Inventors:
Benjamin Y. H. Liu, David B. Kittelson, Daniel F. Dolan, David Y. H. Pui
Abstract: A red maple tree which exhibits an upright broad-columnar form, early autumn maturity, good winter hardiness, excellent red autumn leaf color, and seedlessness.