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Measurement of Valve Temperatures and Strain in a Firing Engine
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English
Abstract
Engine valves must operate in engines with very low failure rates. Long-term durability testing is expensive. This cost could be reduced by running only a final successful proof test, provided adequate data existed to demonstrate that potential life and failure modes have been identified and eliminated by short-term tests and analysis.
This approach was applied to a 1983 DDA Model 4-53 engine valve. The results are used to estimate valve life and, further, to estimate the effects of tolerance variations on valve life.
The techniques used to determine valve temperatures and strains at nominal and unusual operating conditions in firing engines are presented. The experimental study shows that combustion strains and closing strains are caused by two different loading conditions which affect different portions of the valve head, and also shows how these loads vary with their governing parameters. The theoretical basis for these observations and trends is also presented.
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Authors
Citation
Worthen, R. and Rauen, D., "Measurement of Valve Temperatures and Strain in a Firing Engine," SAE Technical Paper 860356, 1986, https://doi.org/10.4271/860356.Also In
References
- Horan, R. P. “Overhead Valve Gear Problems,” SAE Transactions 61 678 686 1953
- Beard, C. A. Hempson, J. G. G. “Problems in Valve Gear Design and Instrumentation,” SAE Paper No. 596-D; October 29 1962
- Jones, D. R. “Fatigue Behavior of Exhaust Valve Alloys,” SAE Paper No. 800315 February 25 1980
- Johnson, G. I. “Studying Valve Dynamics with Electronic Computers,” Application of Computers in Valve Gear Design SAE Tech. Progress Series 5 1963 10 24
- Murray, W. M. “Basic Electronic Circuits for Strain Gages,” Copyrighted by W. M. Hurray 1970
- Cleveland, A. E. “Strain Gage Method of Determining The Running Lash of L-Head and Overhead Engines,” SAE Paper No. 601 March 6 1951
- Vitcha, E. T. “High Temperature Fatigue Testing of Automotive Valve Steels,” Fatigue at Elevated Temperatures American Society for Testing and Materials 231 241 1973
- Hanson, S. S. “Thermal Stress and Low Cycle Fatigue,” McGraw Hill Book Company 1966
- Worthen, R. P. Rauen, D. G. Eaton Proprietary Reports 1979 to 1985
- Turkish, M. C. “Relationship of Valve Spring Design to Valve Gear Dynamics and Hydraulic Lifter Pump-Up,” SAE PAS-CAR, Body & Matls. Meeting Detroit, Michigan March 5 1953
- Worthen, R. P. Tunnecliffe, T. N. “Temperature-Controlled Engine Valves,” SAE Paper No. 820501 February 1982
- LeFeuvre, T. Myers, P. S. Uyehara, O. A. “Experimental Instantaneous Heat Fluxes in a Diesel Engine and Their Correlation,” SAE Paper No. 690464 May 19 1969