This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Evaluation of Cold Start Technologies on a 3L Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 05, 2016 by SAE International in United States
Annotation ability available
Increasingly stringent emissions regulations require that modern diesel aftertreatment systems must warm up and begin controlling emissions shortly after startup. While several new aftertreatment technologies have been introduced that focus on lowering the aftertreatment activation temperature, the engine system still needs to provide thermal energy to the exhaust for cold start. A study was conducted to evaluate several engine technologies that focus on improving the thermal energy that the engine system provides to the aftertreatment system while minimizing the impact on fuel economy and emissions. Studies were conducted on a modern common rail 3L diesel engine with a custom dual loop EGR system. The engine was calibrated for low engine-out NOx using various combustion strategies depending on the speed/load operating condition. The technologies that showed strong potential during this evaluation include a turbine bypass system, early exhaust valve opening, cylinder deactivation, and delayed engine starting. The performance of these technologies was compared using an engine test cell which was programmed to simulate the first portion of the FTP-75 test cycle.
CitationMiwa, J., Mehta, D., and Koci, C., "Evaluation of Cold Start Technologies on a 3L Diesel Engine," SAE Technical Paper 2016-01-0823, 2016, https://doi.org/10.4271/2016-01-0823.
- Neely , G. , Mehta , D. , and Sarlashkar , J. Diesel Cold-Start Emission Control Research for 2015-2025 LEV III Emissions - Part 2 SAE Int. J. Engines 7 3 1302 1310 2014 10.4271/2014-01-1552
- Neely , G. , Sarlashkar , J. , and Mehta , D. Diesel Cold-Start Emission Control Research for 2015-2025 LEV III Emissions SAE Int. J. Engines 6 2 1009 1020 2013 10.4271/2013-01-1301
- Chen , H. , Mulla , S. , Weigert , E. , Camm , K. et al. Cold Start Concept (CSC™): A Novel Catalyst for Cold Start Emission Control SAE Int. J. Fuels Lubr. 6 2 372 381 2013 10.4271/2013-01-0535
- Akihama , K. , Takatori , Y. , Inagaki , K. , Sasaki , S. et al. Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature SAE Technical Paper 2001-01-0655 2001 10.4271/2001-01-0655
- Ratzberger , R. , Kraxner , T. , Pramhas , J. , Hadl , K. et al. Evaluation of Valve Train Variability in Diesel Engines SAE Int. J. Engines 8 5 2379 2393 2015 10.4271/2015-24-2532