Radial counterflow muffler for NO reduction and pollutant collection
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United States of America Patent
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Feb 24, 2015
Grant Date -
Aug 2, 2012
app pub date -
Feb 1, 2012
filing date -
Feb 1, 2011
priority date (Note) -
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Abstract
A scrubbing muffler for internal combustion engines comprises coaxial counter-rotating disk pairs stacked in a cascade. Acoustic pulses are attenuated by doing work and dissipated by the circuitous path through the dynamic cascade. A motor and/or Venturi effect from slipstream over a vehicle assists exhaust and reduces backpressure for greater fuel economy. Exhaust gas fed at the axis is sheared between the disks of the first stage of the cascade as it passes radially outward into a shrouding tank disposed about the cascade. Vortex rebound at the tank wall advects flow radially inward back through the workspace between the first stage disks to axial extraction as feed for the second stage of the cascade. N2 and H2O, along with CO and NO, can pass radially inward to successive stages. Soot and CO2 stay in the tank. NO and CO are reduced at a Faraday disk cathode.
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