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New Strategies for Soot Emission Reduction of HD Vehicles
Technical Paper
2004-01-3046
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The reduction of particulate emissions limits requires new strategies for the tuning of engines and exhaust after treatment systems. A non-blocking exhaust after treatment solution for HD vehicles to achieve the EuroIV emission limits has been developed which consists of a platinum oxidation catalyst and a stainless steel deposition structure with open channels for continuous soot storage and oxidation [1]. The significant advantages compared to standard particulate filters are caused by the open channel structure and characterized by a relatively low level of back pressure, selective separation of soot (EC) and penetrability for engine lubrication oil incineration ash.
Extensive laboratory studies, including a screening of numerous promising deposition structure designs, led to a metal catalyst structure with microsphere coating. The processes dominating particle deposition could be determined, leading to a target-oriented optimization of the deposition structure. Particle deposition caused by diffusion, interception and thermophoresis during instationary test conditions occurs. Measurements on the test bench with an EuroII HD engine show a gravimetric particulate matter reduction of 18 and 55 mg/kWh for the ESC/ETC, which is consistent with the laboratory-studies.
A new photo acoustic instrument (PASS) was applied allowing reliable determination of soot deposition efficiency even during the transient test cycle (ETC) for modern HD engines with a low PM raw emission. Close correlation between number based (SMPS) and mass based (PASS, gravimetric) particle concentration measurements were observed.
The exhaust aftertreatment system investigated here system provides a reliable solution yielding a conversion of up to 70% (ESC/ETC) for elemental carbon at a moderate back pressure.
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Authors
- Dieter Rothe - MAN Nutzfahrzeuge Gruppe, Business Unit Engines
- Frank Ingo Zuther - MAN Nutzfahrzeuge Gruppe, Business Unit Engines
- Eberhard Jacob - MAN Nutzfahrzeuge Gruppe, Business Unit Engines
- Christian Knab - Oberland Mangold
- Matthias Mangold - Oberland Mangold
- Christian Mangold - Oberland Mangold
- Armin Messerer - Institute of Hydrochemistry, Technical University Munich
- Ulrich Pöschl - Institute of Hydrochemistry, Technical University Munich
- Reinhard Niessner - Institute of Hydrochemistry, Technical University Munich
Topic
Citation
Rothe, D., Zuther, F., Jacob, E., Messerer, A. et al., "New Strategies for Soot Emission Reduction of HD Vehicles," SAE Technical Paper 2004-01-3046, 2004, https://doi.org/10.4271/2004-01-3046.Also In
Diesel Particulate Systems, Engines and Components, and Performance Additives 2004
Number: SP-1898; Published: 2004-10-25
Number: SP-1898; Published: 2004-10-25
References
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