This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Experimental Investigation on the Use of Argon to Improve FMEP Determination through Motoring Method
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 09, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
In the ever increasing challenge of developing more efficient and less polluting engines, friction reduction is of significant importance and its investigation needs an accurate and reliable measurement technique. The Pressurized Motoring method is one of the techniques used for both friction and heat transfer measurements in internal combustion engines. This method is able to simulate mechanical loading on the engine components similar to the fired conditions. It also allows measurement of friction mean effective pressure (FMEP) with a much smaller uncertainty as opposed to that achieved from a typical firing setup. Despite its advantages, the FMEP measurements obtained by this method are usually criticized over the fact that the thermal conditions imposed in pressurized motoring are far detached from those seen in fired conditions. In light of these considerations, the authors have put forward a modification to the method, employing Argon in place of Air as pressurization medium. Due to the higher heat capacity ratio, very high in-cylinder gas temperatures, possibly near to the fired conditions, can be achieved using Argon. This allowed better emulation of the fired engine and hence a more representative FMEP measurement. In this publication, experimental results obtained from a testing campaign with different Argon to Air concentration are presented. Tests were carried out on the fully instrumented test bench consisting of a direct-injection compression ignition, four cylinder engine, at different engine speeds and a peak in-cylinder pressure of 84bar. At each set point of speed, the Argon to Air concentration in the manifolds was varied to achieve different in-cylinder temperatures. The measured FMEP values, their uncertainty and their dependence on the different engine operating parameters are reported. It was found that the FMEP in the motored condition was not a function of peak in-cylinder temperature. This insensitivity to in-cylinder temperature further shows the advantage of the pressurized motored method.
CitationCaruana, C., Farrugia, M., Sammut, G., and Pipitone, E., "Experimental Investigation on the Use of Argon to Improve FMEP Determination through Motoring Method," SAE Technical Paper 2019-24-0141, 2019, https://doi.org/10.4271/2019-24-0141.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
- Dao, K., Uyehara, O.A., and Myers, P.S. , “Heat Transfer Rates at Gas-Wall Interfaces in Motored Piston Engine,” SAE Technical Paper 730632 , 1973, doi:10.4271/730632.
- Pike, W.C. and Spillman, D.T. , “The Use of a Motored Engine to Study Piston-Ring Wear and Engine Friction,” Proceedings of the Institution of Mechanical Engineers 178:37-44, 1963.
- Nikanjam, M. and Greif, R. , “Heat Transfer during Piston Compression,” ASME Transactions: Journal of Heat Transfer, 1978.
- Torregrosa, A., Bermudez, V., Olmeda Gonzalez, P., and Figueroa, O. , “Experimental Assessment for Instantaneous Temperature and Heat Flux Measurements under Diesel Motored Engine Conditions,” Energy Conversion and Management 57-66, 2011.
- Caruana, C., Farrugia, M., and Sammut, G. , “The Determination of Motored Engine Friction by Use of Pressurized ‘Shunt’ Pipe between Exhaust and Intake Manifolds,” SAE Technical Paper 2018-01-0121 , 2018, doi:10.4271/2018-01-0121.
- Mauke, D., Dolt, R., Stadler, J., Huttinger, K., and Bargende, M. , Methods of Measuring Friction under Motored Conditions with External Charging (Switzerland: Kistler Group, 2016).
- MAHLE International GmbH , “Engine Testing,” in Pistons and Engine Testing (Stuttgart, Germany: Springer, 2013), Ch. 7, pp. 117-281, ISBN: 3834886629.
- Caruana, C., Farrugia, M., Sammut, G., and Pipitone, E. , “Further Experimental Investigation of Motored Engine Friction Using Shunt Pipe Method,” SAE Technical Paper 2019-01-0930 , 2019, doi:10.4271/2019-01-0930.
- Pipitone, E. and Beccari, A. , “A Study on the Use of Combustion Phase Indicators for MBT Spark Timing on a bi-Fuel Engine,” SAE Technical Paper 2007-24-0051 , 2007, doi:10.4271/2007-24-0051.
- Lawton, B. , “Effect of Compression and Expansion on Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines,” Proc. Instn. Mech. Enginrs., Part A, Journal of Power and Energy 201:175-186, 1987.
- Medtherm Corporations , “Coaxial Surface Thermocouples - Bulletin 500,” Huntsville, AL.
- Nanmac Corporations , “Self-Renewing Thermocouple E12 Series,” Holliston, MA.
- ANBE , “Fine Thermocouples,” Genk, Belgium.
- Pipitone, E., Beccari, A., and Beccari, S. , “The Experimental Validation of a New Thermodynamic Method for TDC Determination,” SAE Technical Paper 2007-24-0052 , 2007, doi:10.4271/2007-24-0052.
- Nilsson, Y. and Eriksson , “Determining TDC Position Using Symmetry and Other Methods,” SAE Technical Paper 2004-01-1458 , 2007, doi:10.4271/2004-01-1458.
- Pfriem, H. , “Periodic Heat Transfer at Small Pressure Fluctuations,” National Advisory Committee for Aeronautics, Washington, 1940.
- Wendland, D.W. , “The Effect of Periodic Pressure and Temperature Fluctuations on Unsteady Heat Transfer in a Closed System,” University of Wisconsin, Wisconsin, 1968.
- Annand, W.J.D. and Ma, T.H. , “Instantaneous Heat Transfer Rates to the Cylinder Head Surface of a Small Compression-Ignition Engine,” Proc. Inst. Mech. Eng. 185, 1970.