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Study of Nozzle Fouling: Deposit Build-Up and Removal
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 19, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The global demand for decreased emission from engines and increased efficiency drives manufactures to develop more advanced fuel injection systems. Today's compression-ignited engines use common rail systems with high injection pressures and fuel injector nozzles with small orifice diameters. These systems are highly sensitive to small changes in orifice diameters since these could lead to deteriorations in spray characteristics, thus reducing engine performance and increasing emissions. Phenomena that could create problems include nozzle fouling caused by metal carboxylates or biofuels. The problems increase with extended use of biofuels. This paper reports on an experimental study of nozzle hole fouling performed on a single-cylinder engine. The aim was to identify if the solubility of the fuel has an effect on deposit build-up and, thus, the reduction in fuelling with associated torque loss, and if there is a probability of regenerating the contaminated injectors. Additionally, the influence of the nozzle geometry was tested by using injectors of various designs. In the experiments, high-load engine operation was used to create the effect of fouling in the presence of zinc-neodecanoate. Solubility properties of the fuel were tested by using high- and low-aromatic-content diesel fuels. To gain insight into the morphology and chemical characteristics of the deposits, the nozzles were opened and examined with scanning electron microscopy/energy dispersive x-ray (SEM/EDX). The results showed higher power loss in low-aromatic-content fuels. The experiments also showed regained engine power within an hour using uncontaminated fuel in a fouled nozzle. A three steps process is proposed as the mechanism for deposit build-up and removal in injector nozzles. It is suggested that fouling of the injector is equilibrium between the different steps of the mechanisms.
CitationBernemyr, H., Csontos, B., Hittig, H., and Forsberg, O., "Study of Nozzle Fouling: Deposit Build-Up and Removal," SAE Technical Paper 2019-01-2231, 2019, https://doi.org/10.4271/2019-01-2231.
Data Sets - Support Documents
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- Birgel, A., Ladommatos, N., Aleiferis, P., Zülch, S., Milovanovic, N., Lafon, V., Orlovic, A., Lacey, P., and Richards, P., “Deposit Formation in the Holes of Diesel Injector Nozzles: A Critical Review,” (724), 2008, doi:10.4271/2008-01-2383.
- Barker, J., Richards, P., Goodwin, M., and Wooler, J., “Influence of High Injection Pressure on Diesel Fuel Stability: A Study of Resultant Deposits,” SAE Int. J. Fuels Lubr. 2(1):877-884, 2009, doi:10.4271/2013-01-2687.
- Lacey, P., Gail, S., Kientz, J.M., Milovanovic, N., and Gris, C., “Internal Fuel Injector Deposits,” SAE Int. J. Fuels Lubr. 5(1):2011-01-1925, 2011, doi:10.4271/2011-01-1925.
- Lacey, P., Gail, S., Grinstead, D., Daveau, C., Caprotti, R., Dallanegra, R., and Pigeon, D., “Use of a Laboratory Scale Test to Study Internal Diesel Injector Deposits,” SAE Tech. Pap., 2016, doi:10.4271/2016-01-2247.
- Behrendt, C. and Smith, A., “A Study of Diesel Fuel Injector Deposit Effects on Power and Fuel Economy Performance,” 2017, doi:10.4271/2017-01-0803.Copyright.
- IPCC - intergovermental panel on climate change, “IPCC special report on the impacts of global warming of 1.5 °C - Summary for policy makers,” 2018.
- Knothe, G. and Razon, L.F., “Biodiesel fuels,” Prog. Energy Combust. Sci. 58:36–59, 2017, doi:10.1016/j.pecs.2016.08.001.
- Berk, C., Consul, A., Barros, S., and Specialist, A., “Biofuels Annual,” 2018.
- Chaikool, P., Intravised, K., Patsin, P., and Laonapakul, T., “A Study of Effect of Biodiesel on Common-Rail Injection Nozzle,” SAE Int. J. Fuels Lubr. 9(3):2016-01-9077, 2016, doi:10.4271/2016-01-9077.
- Sem, T.R., “Investigation of Injector Tip Deposits on Transport Refrigeration Units Running on Biodiesel Fuel,” (724), 2004, doi:10.4271/2004-01-0091.
- Uitz, R., Brewer, M., and Williams, R., “Impact of FAME Quality on Injector Nozzle Fouling in a Common Rail Diesel Engine,” 4970, 2018.
- Ikemoto, M., Omae, K., Nakai, K., Ueda, R., Kakehashi, N., and Sunami, K., “Injection Nozzle Coking Mechanism in Common-rail Diesel Engine,” SAE Int. J. Fuels Lubr. 5(1):2011-01-1818, 2011, doi:10.4271/2011-01-1818.
- Rounthwaite, N.J., Williams, R., Global, S., Uk, S., Mcgivery, C., Jiang, J., Giulliani, F., and Britton, B., “A Chemical and Morphological Study of Diesel Injector Nozzle Deposits - Insights into their Formation and Growth Mechanisms,” 2018, doi:10.4271/2017-01-0798.
- Risberg, P.A., Alfredsson, S., and Ab, S.C.V., “The Effect of Zinc and Other Metal Carboxylates on Nozzle Fouling,” SAE Tech. Pap. 2016-1-8, 2016, doi:10.4271/2016-01-0837.
- Velaers, A.J., Goede, S. De, Woolard, C., and Burnham, R., “Injector Fouling Performance and Solubility of GTL Diesel Dosed with Zinc,” 2013, doi:10.4271/2013-01-1697.
- Goede, S. De, Barbour, R., Velaers, A., Sword, B., Burton, D., and Mokheseng, K., “The Effect of Near-Zero Aromatic Fuels on Internal Diesel Injector Deposit Test Methods” 2017, doi:10.4271/2017-01-0807.
- Argueyrolles, B., Dehoux, S., Gastaldi, P., Grosjean, L., Levy, F., Michel, A., and Passerel, D., “Influence of injector nozzle design and cavitation on coking phenomenon,” 1405-1415, 2007, doi:10.4271/2007-01-1896.
- Risberg, P.A., Adlercreutz, L., Aguilera, M.G., Johansson, T., and Stensiö, L., “Development of a Heavy Duty Nozzle Coking Test,” 2013, doi:10.4271/2013-01-2674.
- Königsson, F., Risberg, P., and Angstrom, H.-E., “Nozzle Coking in CNG-Diesel Dual Fuel Engines,” 2014, doi:10.4271/2014-01-2700.