Exhaust treatment device for diesel engine
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United States of America Patent
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May 24, 2016
Grant Date -
Feb 5, 2015
app pub date -
Feb 25, 2013
filing date -
Mar 30, 2012
priority date (Note) -
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Abstract
A diesel engine exhaust treatment device includes an exhaust flow divider in an exhaust path. The flow divider causes exhaust to flow EGR gas with PM unevenly distributed and remaining discharged gas in a divided manner. EGR gas is recirculated to a combustion chamber, and the discharged gas is atmospherically discharged. First and second corona discharge passages are provided at the exhaust flow divider. Corona discharge in the first discharge passage causes the PM, water vapor, and oxygen in the exhaust to generate electron attachment. Electrostatic force causes the exhaust to flow the EGR gas with the electron-attached PM, water vapor, and oxygen unevenly distributed and the remaining discharged gas in a divided manner. The discharged gas is guided to the second discharge passage. Corona discharge in the second discharge passage causes gas molecules in the discharged gas to dissociate, and NOx in the discharged gas is reduced to nitrogen.
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