This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Break-In and Operating Conditions on Piston Ring and Cylinder Bore Wear in Spark-Ignition Engines
Technical Paper
2004-01-2917
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A radiotracer method has been developed to measure piston ring and cylinder bore wear rates in spark-ignition (SI) engines. The method has sufficient sensitivity to measure ring and bore wear rates in real time during normal operating conditions. This work reports measurements on the rates of break-in and steady-state wear of piston rings and cylinder bores during a variety of engine operating conditions. Results show that piston ring break-in is minimal and that ring wear rates are constant at steady-state engine operation. The key factor affecting ring wear is engine brake mean effective pressure (BMEP). Ring wear behavior is repeatable for a given engine type and between two different engine designs. Cylinder bore wear is dominated by initial break-in, cold-start wear, and changes in operating conditions. Wear of the cylinder bore during steady-state operating conditions is very low when compared to break-in and changes in conditions. Both piston ring and cylinder bore wear rates as measured by the radiotracer method are reasonable when compared with long-term wear observed in vehicle tests.
Recommended Content
Authors
Citation
Schneider, E. and Blossfeld, D., "Effect of Break-In and Operating Conditions on Piston Ring and Cylinder Bore Wear in Spark-Ignition Engines," SAE Technical Paper 2004-01-2917, 2004, https://doi.org/10.4271/2004-01-2917.Also In
References
- Schneider E. W. Blossfeld D. H. “Radiotracer Method for Measuring Real-Time Piston Ring and Cylinder-Bore Wear in Spark-Ignition Engines,” Nuclear Instruments and Methods in Physics Research A 505 559 563 2003
- Gumbleton J. J. “Piston Ring and Cylinder Wear Measurements Illustrate the Potential and Limitations of the Radioactive Technique,” SAE Trans. 70 333 1962
- Ohmori T. Tohyama M. Yamamoto M. Akiyama K. Tasaka K. Yoshihara T. “Influence of Engine Oil Viscosity of Piston Ring and Cam Face Wear,” SAE Paper 932782 1993
- Schwartz S. Mettrick C. “Mechanisms of Engine Wear and Engine Oil Degradation in Vehicles Using M85 or Gasoline,” SAE Paper 942027 1994
- Perrin K. Pandosh J. Searle A. Shaub H. Sprague S. “Radioactive Tracer Study of Start-Up Wear Versus Steady-State Wear in a 2.3 Liter Engine,” SAE Paper 952474 1995
- Becker E. “An Empirical Model of Cylinder Bore Wear Developed by Simulation,” Mechanical Engineering Department, University of Michigan 1998
- Gangopadhyay A. “Development of a Piston Ring Cylinder Bore Wear Model,” SAE Paper 2000-01-1788 2000
- Essig G. Fehsenfeld P. “Thin Layer Activation Technique and Wear Measurements in Mechanical Engineering,” Nuclear Physics Methods in Materials Research Bethge K. 70 1980
- Treuhaft M. “The Use of Radioactive Tracer Technology to Measure Engine Ring Wear in Response to Dust Ingestion,” SAE Paper 930019 1993
- Schneider E. W. Blossfeld D. H. Balnaves M. A. “Effect of Speed and Power Output on Piston Ring Wear in a Diesel Engine,” SAE Paper 880672 1988
- Schneider E. W. Blossfeld D. H. “Real-Time Measurement of Camshaft Wear in an Automotive Engine,” SAE Trans. 99 1990