The review paper summarizes major developments in vehicular emissions regulations and technologies in 2013. First, the paper covers the key regulatory developments in the field, including proposed light-duty (LD) criteria pollutant tightening in the US; and in Europe, the continuing developments towards real-world driving emissions (RDE) standards. Significant shifts are occurring in China and India in addressing their severe air quality problems. The paper then gives a brief, high-level overview of key developments in fuels. Projections are that we are in the early stages of oil supply stability, which could stabilize fuel prices. LD and HD (heavy-duty) engine technology continues showing marked improvements in engine efficiency. Key developments are summarized for gasoline and diesel engines to meet both the emerging NOx and GHG regulations. HD engines are or will soon be demonstrating 50% brake thermal efficiency using common approaches. NOx control technologies are then summarized, including SCR (selective catalytic reduction) systems and SCR filter developments. Emphasis is on low-temperature deNOx and integration of components and control. Diesel PM (particulate matter) reduction technologies are evolving around the behavior of ash deposits and SCR integration. Filters for direct injection gasoline applications are developing very rapidly, and in some cases the back pressure, light-off characteristics, and emissions reductions are very similar to standard three way catalysts (TWCs). Oxidation catalysts mainly involve developments towards stubborn problems, like low-temperature performance with exhaust with high hydrocarbon and CO, and methane oxidation. Finally, the paper discusses some key developments in gasoline gaseous emission control, focusing on matching engine calibration with emissions system characteristics; and on lean burn gasoline emissions control. CITATION: Johnson, T., "Vehicular Emissions in Review," SAE Int. J. Engines 7(3):2014, doi:10.4271/2014-01-1491. 2014-01-1491 Published 04/01/2014 Copyright © 2014 SAE International doi:10.4271/2014-01-1491 saeeng.saejournals.org 1207 This paper is posted on this website with permission from SAE International. It may not be shared, downloaded, duplicated, or transmitted in any manner without prior written permission from SAE.

https://www.corning.com/media/worldwide/cet/documents/SAE_2014-01-1491.pdf

Vehicular Emissions in Review

This summary covers key and representative developments in diesel emissions regulations, engine developments, and nitrogen oxide (NOx), particulate matter (PM), and hydrocarbon (HC) remedia...

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Vehicle Demonstration of Naphtha Fuel Achieving Both High Efficiency and Drivability with EURO6 Engine-Out NOx Emission

Increasing carbon dioxide accumulation in earth’s atmosphere and the depletion of fossil resources pose huge challenges for our society and, in particular, for all stakeholders in the transportatio...

/pdf/tailor-made-fuels-for-future-engine-concepts-1rvz5hzdgy.pdf

Tailor-made fuels for future engine concepts

Di-n-buthylether, n-octanol, and n-octane as fuel candidates for diesel engine combustion

Exhaust Temperature Management for Diesel Engines Assessment of Engine Concepts and Calibration Strategies with Regard to Fuel Penalty

Potential of Synthetic Fuels in Future Combustion Systems for HSDI Diesel Engines

Modernes Dieselbrennverfahren: Günstige Motorrohemissionen bei verbessertem Verbrauchsverhalten

Future emission norms will further reduce the vehicle emissions of diesel engines. To meet the goal of achieving these stringent limits while maintaining attractive attributes of marketability, the combustion system needs also to be revised or redesigned in order to achieve the CO2 limits that will be demanded in the future, while simultaneously producing significantly reduced untreated NO2 emissions. In the scope of this article, the basic conditions for the design of future combustion systems shall be discussed. As a possible solution, we will introduce the FEV combustion system HECS (High Efficiency Combustion System), with which very low fuel consumption can be obtained even at high part loads, while producing minimal nitrogen oxides.

Advanced diesel combustion

Future of Combustion Engines

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