Gas separation: processes – Electric or electrostatic field – Plural separate stages or zones
Reexamination Certificate
2011-04-19
2011-04-19
Chiesa, Richard L (Department: 1776)
Gas separation: processes
Electric or electrostatic field
Plural separate stages or zones
C095S080000, C095S081000, C096S069000, C096S077000, C096S080000
Reexamination Certificate
active
07927401
ABSTRACT:
A device for reducing the number of particles in the exhaust gas of an internal combustion engine includes at least two structures through which an exhaust gas can flow, initially through a first structure and then through a second structure during operation. An electrical potential difference can be generated between the structures. In this way, the exhaust gas downstream of the second structure has fewer particles, averaged over time, than the exhaust gas upstream of the first structure. In addition, the particles downstream of the second structure have a larger mean diameter than those upstream of the first structure, so that it is possible to reduce emissions, in particular of fine dust, in the exhaust gas of internal combustion engines. A method for reducing the number of particles in the exhaust gas of an internal combustion engine, is also provided.
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International Search Report, dated Jun. 29, 2007.
Chiesa Richard L
Emitec Gesellschaft fuer Emissions-technologie mbH
Greenberg Laurence A.
Locher Ralph E.
Stemer Werner H.
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