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US 6,205,777 B1Granted
Catalytic method
AssigneePrecision Combustion, Inc.
InventorWilliam C. Pfefferle
Life of this patent
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Abstract
An emissions control system for rich-burn internal combustion engines, includes a reaction chamber for thermal oxidation of exhaust gas fuel values. A passive means utilizes exhaust flow energy for induction of air into engine exhaust gas, and a duct transfers the exhaust gas together with the inducted air into the reaction chamber for thermal oxidation. To achieve a high degree of efficiency the thermal oxidation is facilitated by through mixing of air and exhaust gas to insure gas phase thermal reaction.
Claims7
An emissions control system for a rich-burn, small internal combustion engine, which comprises;
- a. a small internal combustion engine having mounted on the exhaust thereof an engine noise muffler;
- b. a reaction chamber within the engine exhaust muffler for thermal oxidation of fuel values in the engine exhaust;
- c. means within the reaction chamber for inducing effective recirculation of the exhaust flowing through said reaction chamber, and creating a low pressure region in the reaction chamber proximal the chamber inlet;
- d. passive means to utilize exhaust flow energy as the sole means for induction of air into the engine exhaust;
- and
- e. duct means for transfer of said exhaust together with said inducted air into said reaction chamber.
3 more elements
Dependencies are inferred from the claim text.