This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Premixed Compression Ignition (PCI) Combustion for Simultaneous Reduction of NOx and Soot in Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 08, 2004 by SAE International in United States
Annotation ability available
Investigations of Homogeneous Charge Compression Ignition (HCCI) combustion have been actively conducted as a new combustion technology to substantially and simultaneously reduce NOx and soot to comply with the future stringent exhaust emission regulations. In the past, a method of injecting fuel at the initial stage of the compression stroke has been proposed, but it is known that fuel adheres to the cylinder wall, causing a decline in combustion efficiency and oil dilution. The authors have developed Premixed Compression Ignition (PCI) combustion as a technology of solving the above problem as well as simultaneously reducing NOx and soot. In PCI combustion, fuel is injected into a combustion chamber in the vicinity of the top dead center for preventing fuel from adhering to the wall, and pre-mixture, which is formed shortly before ignition, is burnt. By pre-mixing, this combustion reduces the over-rich region of the mixture to reduce soot emissions, and at the same time lowers the combustion temperature by introducing a large amount of EGR to reduce NOx emissions.
This paper reports the result of detailed examination of the basic characteristics of PCI combustion using a single-cylinder engine, and that PCI combustion which uses our investigated approaching can achieve substantial and simultaneous reduction of NOx and soot. This paper also studies the possibility of realizing Split-PCI combustion, which uses the two different combustion modes of PCI combustion and diffusion combustion during one cycle, in high-load operation where application of PCI combustion is restricted by diesel knock. As results of this study, this paper reports that it is available to reduce NOx and soot emissions to a large extent by Split-PCI combustion, even in high-load operation.
CitationOkude, K., Mori, K., Shiino, S., and Moriya, T., "Premixed Compression Ignition (PCI) Combustion for Simultaneous Reduction of NOx and Soot in Diesel Engine," SAE Technical Paper 2004-01-1907, 2004, https://doi.org/10.4271/2004-01-1907.
SAE 2004 Transactions Journal of Fuels and Lubricants
Number: V113-4; Published: 2005-07-05
Number: V113-4; Published: 2005-07-05
- Onishi, S. Hong Jo, S. Shoda, K. Do Jo, P. Kato, S. “Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engine” SAE Paper 790501 1979
- Thring R.H. “Homogeneous-Charge Compression Ignition (HCCI) Engines” SAE Paper 892068 1989
- Takeda Y. Nakagome K. Niimura K. “Emission Characteristics of Premixed Lean Diesel Combustion with Extremely Early Staged Fuel Injection” SAE Paper 961163 1996
- Yanagihara H. Sato Y. Mizuta, J. “A Simultaneous Reduction of NOx and Soot in Diesel Engines under a New Combustion System (Uniform Bulky Combustion System - UNIBUS) 17th. Int. Viena Motor Symposium 303 304 1996
- Furutani, M. Ohta, Y. Konno, M. Hasegawa, M. “An Ultra-Lean Premixed Compression-Ignition Engine Concept and its Characteristics,” Proceeding of The 4th International Symp. COMODIA 98 Japan 173 177 1998
- Sasaki, S. Ito, T. Iguchi, S. “Smoke-lessRich Combustion by Low Temperature Oxidation in Diesel Engines,” 9.Aachen Colloquium Automobile and Engine Technology 2000 767 2000
- Akihama, K. Takatori, Y. Inagaki, K. “Mechanism of the Smokeless Rich Diesel Combustion by Reduced Temperature,” SAE Paper 2001-01-0655 2001
- Kamimoto Takeyuki et al. “High Combustion Temperature for the Reduction of Particulate in Diesel Engines” SAE 1988-88-0423 1988
- Iwabuchi, Y. Kawai, K. Shoji, T. Takeda, Y. “Trial of New Concept Diesel Combustion System - Premixed Compression-Ignited Combustion -” SAE Paper 1999-01-0185 1999
- Baert R.S.G Beckman D.E Verbeek R.P. “New EGR Technology Retains HD Diesel Economy with 21st Century Emissions” SAE Paper 960848 1996
- Aoyagi et al. “Study of NO and Soot Formation in Direct Injection Diesel Engines by the Direct Gas Sampling Method (first report, when there is no swirl with a shallow dish-shaped piston),” JSME Transactions B 46 403 March 1980
- Westbrook Charles K. “Chemical Kinetics of Hydrocarbon Ignition in Practical Combustion Systems” Proceedings of Combustion Institute 28 2000 1563 1577
- Amsden A.A. O'rourke P.J. Buller T.D. “KIVA Computer Program for Chemically Reactive Flows with Spray,” Los Alamos National Labs. Rept. LA-11560-MS 1989
- Naber J.D. Reitz R.D. “Modeling Engine Spray/Wall Impingement,” SAE Paper 880107 1988
- Hosoi Kenzo “Estimation of Excess Air Ratio, Mass Emission and Fuel Economy by Exhaust Gas Composition,” Japan Automobile Research Institute Technical Information No.1 1991