This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Improving Heavy-Duty Engine Efficiency and Durability: The Rotating Liner Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 11, 2005 by SAE International in United States
Annotation ability available
The Rotating Linear Engine (RLE) derives improved fuel efficiency and decreased maintenance costs via a unique lubrication design, which decreases piston assembly friction and the associated wear for heavy-duty natural gas and diesel engines. The piston ring friction exhibited on current engines accounts for 1% of total US energy consumption. The RLE is expected to reduce this friction by 50-70%, an expectation supported by hot motoring and tear-down tests on the UT single cylinder RLE prototype. Current engines have stationary liners where the oil film thins near the ends of the stroke, resulting in metal-to-metal contact. This metal-to-metal contact is the major source of both engine friction and wear, especially at high load. The RLE maintains an oil film between the piston rings and liner throughout the piston stroke due to liner rotation. This assumption has also been confirmed by recent testing of the single cylinder RLE prototype. The rotating liner-head seal is the most challenging technical obstacle. A face seal design for this application has been extensively tested and verified with a test rig and a single cylinder, light-duty based, prototype RLE. This document describes the technical background of the RLE concept, summarizes the current progress and tests that confirm the assumptions behind this design, describes the model used to estimate the RLE efficiency benefits for real world heavy-duty applications, and describes the future heavy-duty multi-cylinder RLE prototype.
CitationDardalis, D., Matthews, R., Kiehne, T., and Kim, M., "Improving Heavy-Duty Engine Efficiency and Durability: The Rotating Liner Engine," SAE Technical Paper 2005-01-1653, 2005, https://doi.org/10.4271/2005-01-1653.
CI and SI Power Cylinder Systems and Power Boost Technology
Number: SP-1964 ; Published: 2005-04-11
Number: SP-1964 ; Published: 2005-04-11
- Ting, L.L. (1980), “Lubricated Piston Rings and Cylinder Bore Wear,” Wear Control Handbook, ASME, pp. 609-665.
- Hamrock, J.B. (1994), Fundamentals of Fluid Film Lubrication, McGraw-Hill, Inc.
- Ricardo, H.R., and Hempson J. G. (1968), The High Speed Internal Combustion Engine, Fifth Edition, Blackie & Son Ltd.
- Needleman, W. M., and Mandhavan P. V. (1988), “Review of Lubricant Contamination and Diesel Engine Wear”, SAE Paper 881827.
- Ku Y. G., and Patterson D. J. (1988), “Piston and Ring Friction by the Fixed Sleeve Method”, SAE Paper 880571.
- Kim, M., Dardalis D., Matthews R.D., and Kiehne T.M. (2005), “Engine Friction Reduction Through Liner Rotation”, SAE Paper 2005-01-1652
- Patton, K. J., Nischke R. J., and Heywood J. B (1989), “Development and Evaluation of a Friction Model for Spark Ignition Engines”, SAE Paper 890836.
- Chen, S. K., and Flynn P. F. (1965), “Development of a single Cylinder Compression Ignition Research Engine”, SAE Paper 650733.
- Dardalis, D. (2003), “A Unique Hydrodynamic Face Seal for the Rotating Liner Engine, and the Rotating Liner Engine Face Seal Transient Code”, Ph.D. Dissertation, University of Texas at Austin.
- Kouremenos, D. A., Rakopoulos C. D., Hountalas T.D., and Zannis T.K. (2001), “Development of a Detailed Friction Model to Predict Mechanical Losses at Elevated Maximum Combustion Pressures”, SAE Paper 2001-01-0333.
- Rezeka S. F., and Henein N.A. (1984), “A New Approach to Evaluate Instantaneous Friction and its Components in an Internal Combustion Engine”, SAE Paper 840179.
- Lawrence, J. B. (1988), “Effect of Cylinder Distortions and Piston Ring Design on Oil Consumption and Friction Losses in Automobile Engines”, DE-AC02-90236.
- De Petris C., Giglio V., and Poli G. (1996), “Some Insights on Mechanisms of Oil Consumption”, SAE Paper 961216 (SP-1182).
- Gardner T. P., and Henein N. A. (1988), “Compression Ratio Optimization in a Direct Injection Diesel Engine - A Mathematical Model”, SAE Paper 880427.
- Levinson I. J. (1978), Machine Design, Reston Publishing Company, Inc.
- Kouremenos, D. A., Rakopoulos C. D., Hountalas T.D., Zannis T.K. 2001, “Development of a Detailed Friction Model to Predict Mechanical Losses at Elevated Maximum Combustion Pressures” SAE Paper 2001-01-0333
- Lebeck A. O. (1987), “Parallel Sliding Load Support in the Mixed Friction Regime”, ASME J. of Tribology, 109: pp196-205
- Lenz, V. (2000), Amzoil Inc., Private Communication.
- Marek L. S., Bryzik W., and Henein N.A. (1991), “Effect of Load and Other Parameters on Instantaneous Frictional Torque in Reciprocating Engines”, SAE Paper 910752.
- Mitsumoto, S., Miyamoto T., and Yamamoto H. (1989), “Effect of Lubricant Viscocity, Additives and Ash Content on Durability in a Heavy Duty Diesel Engine”, SAE Paper 892050.
- Patton, K. J., Nischke R. J., Honeywood J. B, 1989 “Development and Evaluation of a Friction Model for Spark Ignition Engines SAE Paper 89083
- Rezeka S. F., Henein N.A., 1984 “A New Approach to Evaluate Instantaneous Friction and its Components in an Internal Combustion Engine” SAE Paper 840179
- Ricardo, H.,R. and Hempson J. G. The High Speed Internal Combustion Engine Fifth Edition, Blackie & Son Limited 1968
- Roberts. C, and Matthews R. D. (1996), “Development and Application of an Improved Ring Pack Model for Hydrocarbon Emissions Study”, SAE Paper 961966.
- Setright, L. J. K. (1975), Some Unusual Engines Mechanical Engineering Publications Ltd.
- Tian T, Wong V. W., and Heywood J. B. (1996), “A piston ring-pack film thickness and friction model for multigrade oils and rough surfaces”, SAE Paper 962032.