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US 6,449,947 B1Granted
Low pressure injection and turbulent mixing in selective catalytic reduction system
AssigneeFleetguard, Inc.
InventorsZ. Gerald Liu, Barry M. Verdegan
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AssigneeFleetguard, Inc.
InventorsZ. Gerald Liu, Barry M. Verdegan
Estimating the term…
A selective catalytic reduction system for engine exhaust injects a source of ammonia, preferably an aqueous urea solution, or other ammonia solution, to preferably evaporate, decompose and hydrolyze to produce ammonia to react with and reduce NOx in the exhaust. A turbulence generator between the injector and a downstream catalyst enhances ammonia mixing upstream of the catalyst. A perforated reflector between the injector and the catalyst passes the exhaust through the perforations and reflects exhaust back toward the injector, to generate the turbulence to achieve enhanced ammonia mixing. A low pressure generator creates a low pressure evaporative diffusion enhancement zone at the injector accelerating evaporation rate and accelerating ammonia diffusion and mixing with the exhaust.
A selective catalytic reduction device for engine exhaust comprising:
A selective catalytic reduction device for engine exhaust comprising:
A selective catalytic reduction device for engine exhaust comprising:
A selective catalytic reduction device for engine exhaust comprising:
A selective catalytic reduction device for engine exhaust comprising:
Dependencies are inferred from the claim text.