SAE 2014 Heavy-Duty Diesel Emissions Control Symposium
Technical Session Schedule
Thursday, September 18
(Session Code: HDD300)
Room Bankett High 10:30
Moderators - Gudmund Smedler, Johnson Matthey AB
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|Developments to Reduce CO2 Emissions from Heavy Duty Engines
This presentation will cover recent developments in technology to reduce heavy duty engine CO2 emissions, focussing on measures to reduce engine friction, investigations with a high pressure common rail system, and the application of a highly efficient SCR system.
Chris Such, Ricardo UK, Ltd.
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|The Journey from DI-Diesel via HCCI to Partially Pre-mixed Combustion with Very High Thermal Efficiency
If the production of harmful emissions is prevented already during combustion then the expensive and space consuming Emissions After-Treatment System (EATS) can be removed. The reduction of CO2 emissions can anyway not be achieved with EATS, but requires increased engine efficiency or a fuel with reduced amount of “fossil” carbon.
The research into Homogeneous Charge Compression Ignition (HCCI) created a completely new foundation for perspectives on clean and efficient engine combustion – fast combustion that improves thermodynamic efficiency - lean premixing for low temperature combustion that reduces emissions of NOx and soot. However, where HCCI is more of an idealized process, Partially Premixed Combustion (PPC) carries the legacy further into practical engines with increased controllability, very high load capability and efficiency as well as unrivaled fuel flexibility.
The presentation discusses the evolution from DI-Diesel through HCCI to PPC. Insights to the coming PPC production engines are given as well as an outlook of how PPC paves the way for new well-to-wheel efficient and clean fuels.
Martin Tunér, Lund University
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|Modeling and Simulation for the Development of the Next Generation of Aftertreatment Systems
Evolution of diesel aftertreatment systems needs to target complex challenges such as CO2 / GHG reduction, in-use compliance, OBD, reduction of development, installation and operation costs, and integration of emerging technologies.
Modeling and simulation tools help meeting these challenges through in-depth understanding of component performance and interactions, faster calibration process, improved robustness, and overall system optimization.
The presentation discusses the model-based development process, beginning with modeling the system components, followed by integration with control algorithms into a system model, and then into a powertrain or vehicle model. Issues such as in-service conformity, NTE, and system robustness are addressed.
Vadim Strots, Stephan Adelberg, Peter van Horrick, Benjamin Tilch, Lutz Kraemer, IAV GmbH
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|Global Emission Strategy of the New Mercedes Benz Medium Duty Engines
Someday, the story of a well-proven engine concept inevitably comes to an end. In the mid-nineties, the 900 series replaced the legendary engines of the 300 class, which formed the backbone of the Mercedes-Benz medium duty powertrain since 1949. Fifteen years later, Daimler Trucks is now presenting the engines OM 934 and OM 936 of the new developed Medium Duty Engine Generation (MDEG) to replace this likewise successful 900 engine class.
The presentation illustrates selected highlights of the MDEG’s thermodynamic concept as well as the technology of catalysis and exhaust gas filtration in consideration of the constraints of the EURO VI and the EU-Stage IV/Tier 4 final legislation.
Uwe Gaertner, P. Benz, M. Ernst, J. Lehmann, Frank Peter Zimmermann, Daimler AG