Diesel engine exhaust filtration system and method
July 9, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesApparatus for reducing non-gaseous pollutants Diesel exhaust particulate and organic vapor emission control Process for the stabilization of metal-containing hydrocarbon fuel compositions Apparatus comprising the combination of filter apparatus and regeneration apparatus and process for regenerating the filter apparatus using the regeneration apparatus Apparatus for removing carbon particles from exhaust gas from internal combustion engine Diesel particulate traps Low energy regeneration system for particulate trap for an internal combustion engine Process and system for the oxidation of engine emission particulates deposited in a particulate filter trap Diesel particulate traps Method and apparatus for filtering solid particulate matter from diesel engine exhaust InventorsApplicationNo. 549738 filed on 07/09/1990US Classes:60/274, Anti-pollution55/466, WITH SEPARATED NONGASEOUS MATERIAL CONDUCTING OR TREATING MEANS60/278, Material from exhaust structure fed to engine intake60/279, Separated reactive constituent of exhaust fed to engine60/288, Exhaust gas diverted from reactor or treating agent mixer60/289, Air feed to reactor modulated or diverted by control60/295Having means for regenerating, replacing, or feeding liquid or solid reagent or catalystExaminersPrimary: Hart, DouglasAttorney, Agent or FirmForeign Patent References
International ClassF01N 003/02AbstractA diesel engine exhaust filtration system and method which removes both diesel particulate matter (DPM) and unburned hydrocarbons (UHC) from the exhaust gases. Two filters in parallel are used, each alternating operation as the other regenerates. Each filter is preferred to be constructed in a conventional manner and operates at between 100 to 300 degrees Centigrade. A microprocessor controlled valve system regulates which filter is active and which is regenerating and/or inactive. DPM accumulates at the active filter, with UHC condensing on the DPM. When the active filter becomes clogged, the microprocessor switches it to inactive status, and switches the other filter to active status. Low temperature regeneration is initiated by the microprocessor in which DPM and UHC burn slowly across the entire filter. A recirculation conduit provides for the gases produced by the regeneration to be directed to the air intake of the diesel engine. Any remaining UHC or DPM will be subsequently burned in the combustion chambers of the diesel engine or taken out by the other active filter. When regeneration has completed, the inactive filter will await being switched by the microprocessor to active status when the other filter has become sufficiently clogged that it is time for it to be regenerated.Other References
Field of SearchAnti-pollutionMaterial from exhaust structure fed to engine intake Separated reactive constituent of exhaust fed to engine Exhaust gas diverted from reactor or treating agent mixer Air feed to reactor modulated or diverted by control Having means for regenerating, replacing, or feeding liquid or solid reagent or catalyst WITH SEPARATED NONGASEOUS MATERIAL CONDUCTING OR TREATING MEANS | |
