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Autoignition of a Lubricating Oil Droplet with Fuel Ingredients on Abnormal Combustion of Supercharged SI Engine
Technical Paper
2020-32-2318
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The supercharged spark ignition engine (SI engine) has a problem of abnormal combustion. It is called Low Speed Pre-ignition (LSPI). The lubricating oil which has a tolerance for LSPI has been introduced already in automobile market nowadays. However, cause and mechanism of LSPI does not clear sufficiently. It has been reported that the peculiar behavior of LSPI corresponded with behavior of lubricating oil from piston crown [1, 2].
This paper focuses on effect of fuel ingredients on autoignition of a lubricating oil droplet about LSPI. On the ignition source point of view, it is important to clear the mechanism of a lubricating oil droplet autoignition in cylinder. This paper will be tried to clear its mechanism fundamentally by using of electric furnace which is heated an oil droplet. As a result, the activation energy E is found for quantitative evaluation of ignition sauce of LSPI. The experimental data which is heated a lubricating oil droplet by electric furnace show concentration of fuel in an oil droplet is strongly effect on autoignition compared with octane number. The effect of octane number with fuel is little for LSPI on the autoignition of a lubricating oil droplet. More than 30% concentration of fuel in lubricating oil occur autoignition remarkably. It is confirmed that carbon number of fuel ingredients effect strongly on autoignition. These experimental results are evaluated by the calculation with Livengood-Wu integral. The activation energy which is under 6200 [×10^4 J/mol] is dangerous region of autoignition of lubricating oil droplet for abnormal combustion as LSPI. The calculated results suggest that there is safety condition under low speed and high boost operation.
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Sato, Y. and Tanaka, J., "Autoignition of a Lubricating Oil Droplet with Fuel Ingredients on Abnormal Combustion of Supercharged SI Engine," SAE Technical Paper 2020-32-2318, 2020, https://doi.org/10.4271/2020-32-2318.Data Sets - Support Documents
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References
- Tanaka , J. Visualization of Lubricating Oil Droplets from Piston Crown on Pre-Ignition of Super Charged SI Engine 16th Conference the Working Process of the Internal Combustion Engine Graz, Austria 2017
- Ito , T. , Abe , Y. , and Tanaka , J. Lubricating Oil Droplets in Cylinder on Abnormal Combustion in Supercharged SI Engine SAE Technical Paper 2018-32-0008 2018 https://doi.org/10.4271/2018-32-0008
- Dahnz , C. , Han , K. , Spicher , U. , Mager , M. et al. Investigation on Pre-Ignition in Highly Supercharged SI Engines SAE Technical Paper 2010-01-0355 2010 https://doi.org/10.4271/2010-01-0355
- Nakamura , N. , Murakami , N. , Hiraishi , F. , and Hata , K. A Study Using Livengood-Woo Integral on Low Speed Pre-Ignition in Boosted SI Engine The 25th Internal Combustion Engine Symposium Tsukuba, Japan 2014
- Tanaka , J. Behavior of Lubricating Oil Droplet in Cylinder and Fuel Ingredients on Pre-Ignition of Supercharged SI Engine Proceedings of the 17th Working Process of Internal Combustion Engine Graz, Austria 2019
- JJ , C. , Livengood , P. , and Wu , C. Proc. 5th International Symposium on Combustion 347 356 1955
- Tokudome , T. , Komoda , N. , and Korematsu , K. Fundamental Study on Crevice Knock of Engines by Using Combustion Vessel Journal of the Combustion Society of Japan 56 177 258 265 2014
- John , B. , and Heywood Internal Combustion Engine Fundamentals McGraw-Hill 1988 542 545 0-07-028637-x
- Zahdeh , A. , Rothenberger , P. , Nguyen , W. , Anbarasu , M. et al. Fundamental Approach to Investigate Pre-Ignition in Boosted SI Engine SAE Technical Paper 2011-01-0340 2011 https://doi.org/10.4271/2011-01-0340
- Kimoto , Y. , Kobashi , Y. , and Kato , S. Validation of Droplet Evaporation Model for Ethanol-n-Heptane Blends and Its Application into Evaporating Spray Proc. of JSAE Annual Congress 56-14 19 24 2014
- Hiroyasu , H. , Kadota , T. , and Arai , M. Fuel Splay Characterization in Diesel Engines Combustion Modeling in Reciprocating Engines Plenum Press 1980 369 408