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US 6,212,883 B1Granted
Method and apparatus for treating exhaust gas from vehicles
AssigneeMoon-Ki Cho
InventorHan-Yong Kang
Life of this patent
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Abstract
A method and apparatus for treating exhaust gas produced from the combustion of fuels is disclosed. Pollutants such as unburnt hydrocarbons, carbon monoxides, oxides of nitrogen and oxides of sulfur are oxidized by ozone in an ozone contractor, and then resolved by water vapor in a muffler, so that they can be reduced.
Claims9
A method for treating exhaust gas produced from the combustion of fuels, comprising:
- introducing ozone into the exhaust gas in an ozone contactor which is located downstream of a catalytic converter;
- passing the exhaust gas through a muffler having an inlet and an outlet;
- introducing water vapor into the exhaust gas prior to the outlet of the muffler;
- and
- passing the exhaust gas through at least a portion of a muffler, thereby reducing at least one pollutant, selected from a group consisting of unburnt hydrocarbons, carbon monoxide and oxides of nitrogen, from a first concentration to a second lower concentration.
2 more elements
An apparatus for treating exhaust gases produced from the combustion of fuels, comprising:
- an ozone contactor located downstream from a catalytic converter, for mixing the exhaust gas with ozone;
- a muffler having an inlet and an outlet;
- a water evaporator for adding water vapor to the exhaust gas;
- and
- a passageway for conducting water vapor into the muffler such that the exhaust gas stream passes through water vapor prior to exhausting from the outlet of the muffler.
2 more elements
Dependencies are inferred from the claim text.