Filtration system for diesel engine exhaust-II

Patent · Tue Aug 18 04:00:00 EDT 1987

OSTI ID:5926294

Wade, W R; Rao, V D.N.

A filtration system operative to remove oxidizable particulates from the exhaust gas of a diesel engine is described which consists of: (a) filtration means having a filter element operative to filter out and collect a substantial portion of the entrained particulates in the exhaust gas; (b) ignition means having a source of energy selectively supplied for a limited period to effect ignition of the leading portion of the particulate collection, the ignition means being comprised of (I) a flow of hydrocarbon enriched exhaust gas, (II) a tubular foraminous member carrying a catalyst material effective to lower the ignition temperature of the hydrocarbon enriched gas, (III) a supplementary heating element effective to raise the temperature of the foraminous member and catalyst material to a catalyzed oxidation temperature of the hydrocarbon enriched gas, and (IV) a flow control means effective to normally permit the nonenriched exhaust gas to flow through the interior of the tubular member without transgressing the radial thickness of the tubular member; and during regeneration, the hydrocarbon enriched exhaust gas is forced to pass in a radial direction of the foraminous member before exiting therefrom; and (c) means for conducting a flow a exhaust gas of the engine through the filtration means immediately following the ignition, without addition of other energy or hydrocarbon fuel, the flow of exhaust gas being utilized to support the continued oxidation of the ignited particulate collection.

• Assignee: Ford Motor Co., Dearborn, MI
• Patent Number(s): US 4686827
• OSTI ID: 5926294
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102 -- Internal Combustion Engines-- Diesel
330705* -- Emission Control-- Particulates
AIR POLLUTION CONTROL
CATALYSTS
CHEMICAL REACTIONS
CONTROL
DIESEL ENGINES
DIMENSIONS
ENGINES
EXHAUST GASES
FILTERS
FILTRATION
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROCARBONS
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
ORGANIC COMPOUNDS
OXIDATION
PARTICLES
PARTICULATES
POLLUTION CONTROL
REGENERATION
SEPARATION PROCESSES
THICKNESS
TUBES
WASTES