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Technical Paper

An Aerodynamically Regenerated Diesel Particulate Trap Coupled to an Electric Soot Incinerator with Dual Wall-Flow Filters

1995-02-01
950371
The development of a soot incinerator with dual ceramic filters and an electric strip heater is discussed herein. The incinerator is designed to operate in series with a diesel particulate trap developed previously (1).1 The particulate trap consists of a primary ceramic monolith which serves as the filtering device. Once the primary monolith has collected enough soot from the exhaust flow to induce a substantial amount of back pressure to the engine, it is cleaned aerodynamically using short pulses of compressed air. The soot is then forced through a reed valve and into the incinerator chamber, where some of the particulates come in contact with an electric strip heater and burn. The regeneration air exits the incinerator through two secondary ceramic wall-flow rectangular filters, where any unburned particulates are retained. Filtered regeneration air is, thus, released to the atmosphere.
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