This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Combustion Parameters and Lubricating Oil on Particulate Matter Emissions from a Turbo-Charged GDI Engine Fueled with Methanol/Gasoline Blends
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 13, 2014 by SAE International in United States
Annotation ability available
The aim of this research is to experimentally investigate the effects of combustion parameters [ignition timings, injection timings, excess air ratio (λ)] and lubricating oil on particulate matter (PM) emissions from a 2.0 L turbo-charged gasoline direct injection (T-GDI) engine fueled with gasoline (octane number = 97), methanol/gasoline blends and pure methanol.
The results of this paper show that the PM number concentration mostly presents a typical bimodal distribution in figures. The particle number concentration mainly concentrates in the nucleation mode. With the increase of methanol volume fraction in the blended fuel, the PM emissions decrease significantly. Furthermore, there are few particles when the engine fueled with pure methanol. As advancing ignition timing, the total PM number rises by over about 200%. Under the pre-ignition condition, the higher in-cylinder temperature may also accelerate the formation of the nucleation mode particles. As advancing injection timing, PM emissions decrease first, and then increase. As decreasing λ, the total PM number would be more than doubled due to the rich air-fuel mixture. The lower λ may significantly decelerate the oxidation trend of the PM in the combustion process, so that the PM number increases rapidly. The existence of lubricating oil shows a very great impact on PM emissions of T-GDI engine. As increasing a small volume fraction of lubricating oil in the fuel, the PM number significantly increases by several times, especially for accumulation mode particles.
CitationQin, J., Li, X., and Pei, Y., "Effects of Combustion Parameters and Lubricating Oil on Particulate Matter Emissions from a Turbo-Charged GDI Engine Fueled with Methanol/Gasoline Blends," SAE Technical Paper 2014-01-2841, 2014, https://doi.org/10.4271/2014-01-2841.
- Piock, W., Weyand, P., Wolf, E., and Heise, V., “Ignition Systems for Spray-Guided Stratified Combustion,” SAE Int. J. Engines 3(1):389-401, 2010, doi:10.4271/2010-01-0598.
- Park, C., Kim, S., Kim, H. et al., “Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine,” Energy, 41(2012), 401-407, 2012.
- Lu, Z.H., “GDI engine and the optimum technique of lean mixture combustion,” Diesel Engine, 6(2003), 36-41, 2003.
- Vancoillie, J., Demuynck, J., Sileghem, L., “The potential of methanol as a fuel for flex-fuel and dedicated spark-ignition engines”. Applied Energy, 102 (2013), 140-149, 2013.
- Nabi, M., Minami, M., Ogawa, H., and Miyamoto, N., “Ultra Low Emission and High Performance Diesel Combustion with Highly Oxygenated Fuel,” SAE Technical Paper 2000-01-0231, 2000, doi:10.4271/2000-01-0231.
- Piock, W., Hoffmann, G., Berndorfer, A., Salemi, P. et al., “Strategies Towards Meeting Future Particulate Matter Emission Requirements in Homogeneous Gasoline Direct Injection Engines,” SAE Int. J. Engines 4(1):1455-1468, 2011, doi:10.4271/2011-01-1212.
- Chen, L., Braisher, M., Crossley, A., Stone, R. et al., “The Influence of Ethanol Blends on Particulate Matter Emissions from Gasoline Direct Injection Engines,” SAE Technical Paper 2010-01-0793, 2010, doi:10.4271/2010-01-0793.
- Dong, L.H., Shu, G.Q., Liang X.Y., et al., “Effect of lubricating oil additives on particle size distribution and total number concentration in diesel engine,” Lubrication Science 24(2012), 325-338, 2012.
- Brandenberger, S., Mohr, M., Grob, K., Neukom, H.P., “Contribution of unburned lubricating oil and diesel fuel to particulate emission from passenger cars”. Atmospheric Environment 39(2005), 6985-6994, 2005.