This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Experimental Study of Oil Transport on the Piston Third Land and the Effects of Piston and Ring Designs
Technical Paper
2004-01-1934
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Faced with increasing concern for lubricating oil consumption and engine friction, it is critical to understand the oil transport mechanisms in the power cylinder system. Lubricating oil travels through distinct regions along the piston ring pack before being consumed in the combustion chamber, with the oil distribution and dominant driving forces varying substantially for each of these regions. In this work, the focus is on the lowest region in the piston ring pack, namely the third land, which is located between the second compression ring and the oil control ring. A detailed 2D LIF (Two Dimensional Laser Induced Fluorescence) study has been performed on the oil distribution and flow patterns of the third land throughout the entire cycle of a single cylinder spark ignition engine. The impact of speed and load were experimentally observed with the LIF generated real time high-resolution images, as were changes in piston and ring design.
The results reveal the oil flow patterns and timing are consistent and predictable at each operating point. Speed and load variation alter the basic flow pattern through a corresponding change in inertia and gas dragging effect respectively, with ring design variation instigating specific and repeatable phenomenon onto the consistent oil flow pattern. As the majority of lubricating oil consumed in the engine crosses the third land at some point, an understanding of the timing and magnitude of the oil transport processes will allow means to be specifically developed to reduce the net oil flow across the third land towards the combustion chamber. This work forms a foundation for developing oil control strategies for the third land and for identifying how and when oil reaches the upper piston ring pack regions that directly contribute to oil consumption.
Recommended Content
Authors
Citation
Vokac, A. and Tian, T., "An Experimental Study of Oil Transport on the Piston Third Land and the Effects of Piston and Ring Designs," SAE Technical Paper 2004-01-1934, 2004, https://doi.org/10.4271/2004-01-1934.Also In
Engine Lubricants, Effects of Fuels and Lubricants on Automotive Devices, and Lubricant Applications and New Test Methods
Number: SP-1885; Published: 2004-06-08
Number: SP-1885; Published: 2004-06-08
References
- Thirouard, B. 2001 “Characterization and modeling of the fundamental aspects of oil transport in the piston ring pack of internal combustion engines” Department of Mechanical Engineering, MIT June 2001
- Thirouard, B. Tian, T. 2003 “Oil Transport in the Piston Ring Pack (Part I): Identification and Characterization of the Main Oil Transport Mechanisms” SAE Paper 2003-01-1952
- Thirouard, B. Tian, T. 2003 “Oil Transport in the Piston Ring Pack (Part II): Zone Analysis and Macro Oil Transport Model” SAE Paper 2003-01-1953
- Hoult, D. P. Takigushi, M. 1991 “Calibration of Laser Fluorescence Technique Compared with Quantum Theory” STLE Tribology Transactions 34 1991 3 440 444
- Shaw, B. T. Hoult, D. P. Wong, V. W. 1992 “Development of Engine Lubricant Film Thickness Diagnostics Using Fiber Optics and Laser Fluorescence” SAE 920651
- Tamai, G. 1995 “Experimental Study of Engine Oil Film Thickness Dependence on Liner Location, Oil Properties, and Operating Conditions” Department of Mechanical Engineering, MIT September 1995
- Casey, S. 1998 “Analysis of Lubricant Film Thickness and Distribution Along the Piston/Liner Interface in a Reciprocating Engine” Department of Mechanical Engineering, MIT
- Casey, S.M. Tamai, G. Wong, V.W. 1998 “Effects of Engine Operating Conditions on Oil Film Thickness and Distribution along the Piston/Ring/Liner Interface in a Reciprocating Engine,” ASME Fall Technical Conference Clymer, NY 31-2 Sept. 27-30 1998
- Takigushi, M. Nakayama, K. Furuhama, S. Yoshida, H. 1998 “Variation of Piston Ring Oil Film Thickness in an Internal Combustion Engine” SAE Paper 980563
- Nakayama, K. Seki, T. Takiguchi, M. Someya, T. Furuhama, S. 1983 “The Effect of Oil Ring Geometry on Oil Film Thickness in the Circumferential Direction of the Cylinder” SAE Paper 830068
- Froelund, K. Schramm, J. Noordzij, B. Tian, T. Wong, V. 1997 “An Investigation of the Cylinder Wall Oil Film Development During Warm-Up of an SI-Engine Using Laser Induced Fluorescence,” SAE paper 971699
- Inagaki, H. Saito, A. Murakami, M. Konomi, T. 1995 “Development of Two Dimensional Oil Film Thickness Distribution Measuring System,” SAE Paper 952346
- Tian, T. Noordzij, B. L. Wong, V. W. Heywood, J. B. 1996 “Modeling Piston-Ring Dynamics, Blow-by, and Ring-Twist Effects” 27-2 October 1996 ASME Fall Technical Conference 2 67 80 Fairborn, Ohio
- Tian, T. 1997 “Modeling the Performance of the Piston Ring-Pack in Internal Combustion Engines” Department of Mechanical Engineering, MIT June 1997
- Tian, T. Wong, V. W. 2000 “Modeling the Lubrication, Dynamics, and Effect of Piston Tilt of Twin-Land Oil Control Rings in Internal Combustion Engines” Transactions of ASME, Journal of Engineering for Gas Turbines and Power January 2000 122 119
- Tian, T. Wong, W. V. Heywood, J. B. 1998 “Modeling the Dynamics and Lubrication of a Three Piece Oil Control Ring in Internal Combustion Engines” SAE Paper 982657
- Carrié, O. Maerky, C. “U-Flex as an Oil Control Ring for New Generation Engines” Motortechnische Z. 1999 60 570 575