The Calculation of Regeneration Limits of Diesel Particulate Traps for Different Regeneration Methods

Using known approaches to describe the reaction kinetics of soot, simple models are formulated to calculate regeneration limits and describe the interaction between engine and filter.

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  Insulation of exhaust ports and manifold reduces the lower limit of automatic filter regeneration by approx. 0.5 bar bmep.
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  Intake throttling extends the range of automatic regeneration to within medium load.
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  The combination of intake throttling with a small constant output burner enables regeneration for all engine operating conditions.
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  Fuel additives can lower the limit for filter regeneration through lowering the activation energy to within the lower part load without additional measures.