Steady State Investigations of DPF Soot Burn Rates and DPF Modeling Technical University of Denmark

Format:

Conference/Event

Author/Creator:

Cordtz, Cordtz, author.

Contributor:

Ivarsson, Anders

Schramm, Jesper

Conference Name:

10th International Conference on Engines & Vehicles (2011-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

This work presents the experimental investigation of DieselParticulate Filter (DPF) regeneration and a calibration procedureof a 1D DPF simulation model based on the commercial software AVLBOOST volume 5.1. Model constants and parameters are fitted on thebasis of a number of steady state DPF experiments where the DPF isexposed to real engine exhaust gas in a test bed. The DPF is asilicon carbide filter of the wall flow type without a catalyticcoating.A key task concerning the DPF model calibration is to performaccurate DPF experiments because measured gas concentrations,temperatures and soot mass concentrations are used as modelboundary conditions. An in-house-developed raw exhaust gas samplingtechnique is used to measure the soot concentration upstream theDPF which is also needed to find the DPF soot burn rate. The sootconcentration is measured basically by filtering the soot mass of asample gas continuously extracted from the engine exhaust pipe for1-2 hours while also measuring the gas flow passed through thefilter. A small silicon carbide wall flow DPF protected in a sealedstainless steel filter housing is used as sample filter.Measured DPF pressure drop characteristics are used to fit modelconstants of soot and filter properties. Measured DPF gasconversions and soot burn rates are used to fit model activationenergies of four DPF regeneration reactions using O₂ and NO₂ asreactants. Modeled DPF pressure drops and soot burn rates arecompared to the steady state DPF experiments in the temperaturerange between 260 and 480°C. The model widely reproduces theexperimental results. Especially the exponential soot burn rateversus temperature is accurately reproduced by the model

Notes:

Vendor supplied data

Publisher Number:

2011-24-0181

Access Restriction:

Restricted for use by site license