New Strategies for Soot Emission Reduction of HD Vehicles 2004-01-3046
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.
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. Download Citation
Author(s):
Dieter Rothe, Frank Ingo Zuther, Eberhard Jacob, Armin Messerer, Ulrich Pöschl, Reinhard Niessner, Christian Knab, Matthias Mangold, Christian Mangold
Affiliated:
MAN Nutzfahrzeuge Gruppe, Business Unit Engines, Institute of Hydrochemistry, Technical University Munich, Oberland Mangold
Pages: 11
Event:
2004 Powertrain & Fluid Systems Conference & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Particulate Systems, Engines and Components, and Performance Additives 2004-SP-1898, Diesel Exhaust Aftertreatment 2000-2007-PT-126
Related Topics:
Particulate matter (PM)
Engine lubricants
Lubricating oils
Particulate filters
Emissions
Pressure
Catalysts
Corrosion
Steel
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