This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Understanding Low Speed Pre-Ignition Phenomena across Turbo-Charged GDI Engines and Impact on Future Engine Oil Design
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 1, 2015 by SAE International in United States
Annotation ability available
Recent advances in the powertrain design of gasoline engines to meet environmental regulations have posed new challenges to the engine oil development. Smaller displacement engines, often with turbochargers, developed to meet higher fuel economy standards demand higher performance engine oils in conventional areas (oxidation and deposit control, fuel economy), and completely new areas (Low-Speed Pre-ignition [LSPI], turbocharger performance). Formulating engine oils which can simultaneously meet these competing demands will become more complex with increasing performance requirements.
Of particular interest for upcoming engine oil development is the phenomenon of low speed pre-ignition (LSPI). LSPI is an abnormal combustion event in which lubricating oil has been observed to play a role. This phenomenon is restricting automakers when operating their engines at high loads and low speed, which in turn is preventing the engine from operating at the most efficient conditions with respect to emissions and fuel economy.
Currently there are a number of different LSPI engine tests, using different hardware, operating conditions, and criteria to determine when LSPI events have occurred. In this presentation, a comparison of different LSPI tests will be made based on Oronite's extensive research work in this area. This comparison will highlight the differences in test severity and appetite while examining similar lubricant systems across different engine platforms and test conditions.
CitationElliott, I., Sztenderowicz, M., Sinha, K., Takeuchi, Y. et al., "Understanding Low Speed Pre-Ignition Phenomena across Turbo-Charged GDI Engines and Impact on Future Engine Oil Design," SAE Technical Paper 2015-01-2028, 2015, https://doi.org/10.4271/2015-01-2028.
- Zaccardi, J. and Serrano, D., “A Comparative Low Speed Pre-Ignition (LSPI) Study in Downsized SI Gasoline and CI Diesel-Methane Dual Fuel Engines,” SAE Int. J. Engines 7(4):1931-1944, 2014, doi:10.4271/2014-01-2688.
- Amann, M., Mehta, D., and Alger, T., “Engine Operating Condition and Gasoline Fuel Composition Effects on Low-Speed Pre-Ignition in High-Performance Spark Ignited Gasoline Engines,” SAE Int. J. Engines 4(1):274-285, 2011, doi:10.4271/2011-01-0342.
- Zahdeh, A., Rothenberger, P., Nguyen, W., Anbarasu, M. et al., “Fundamental Approach to Investigate Pre-Ignition in Boosted SI Engines,” SAE Int. J. Engines 4(1):246-273, 2011, doi:10.4271/2011-01-0340.
- Welling, O., Collings, N., Williams, J., and Moss, J., “Impact of Lubricant Composition on Low-speed Pre-Ignition,” SAE Technical Paper 2014-01-1213, 2014, doi:10.4271/2014-01-1213.
- Hirano, S., Yamashita, M., Fujimoto, K., and Kato, K., “Investigation of Engine Oil Effect on Abnormal Combustion in Turbocharged Direct Injection - Spark Ignition Engines (Part 2),” SAE Technical Paper 2013-01-2569, 2013, doi:10.4271/2013-01-2569.
- Takeuchi, K., Fujimoto, K., Hirano, S., and Yamashita, M. “Investigation of Engine Oil Effect on Abnormal Combustion in Turbocharged Direct Injection - Spark Ignition Engines.” SAE Int. J. Fuels Lubr. 5(3):2012, doi:10.4271/2012-01-1615.
- Dahnz, C., Han, K., Spicher, U., Magar, M. et al., “Investigations on Pre-Ignition in Highly Supercharged SI Engines,” SAE Int. J. Engines 3(1):214-224, 2010, doi:10.4271/2010-01-0355.