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New Piston Ring Innovations to Help Control Automotive Engine Emissions
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English
Abstract
This paper briefly reviews the progress in reducing emissions over the past eight years through improved piston ring designs and compatible facings. The newer emissions control laws for 1976 require considerable further work in reducing emissions from every possible source.
The authors discuss the green engine effect and suggest the use of reduced-friction piston rings to yield assembly-line emissions test results more nearly representative of the emissions from an engine after extended break-in running.
To reduce oil contamination for the purpose of conserving natural resources by extending oil change intervals and also to reduce emissions, the writers propose the use of zero blowby piston rings and discuss a novel design.
New piston ring facings may also play a part in improving durability and compatibility when ashless oils are specified and when the piston rings must be mounted at the top of the piston.
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Authors
Citation
Prasse, H., McCormick, H., and Anderson, R., "New Piston Ring Innovations to Help Control Automotive Engine Emissions," SAE Technical Paper 730006, 1973, https://doi.org/10.4271/730006.Also In
References
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- Department of Health, Education and Welfare Federal Register 33 108 June 4 1968
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- Wentworth J. T. “Piston and Ring Variables Affect Exhaust Hydrocarbons Emissions.” SAE Transactions 77 1968 paper 680109
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- Prasse H. F. McCormick Harold E. Anderson Roy D. “Automotive Piston Rings 1967-State of the Art.” SAE Transactions 76 paper 670019
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- Müller Reinhard Dr. -Ing. “Die Form des Kolbenrings im Spannband und ihre Beziehung zur Stetigen Pressungsverteilung im runden Kaliberring.” Motortechnische Zeitschrift (MTZ) 32 6 1971
- Prasse H. F. McCormick Harold E. Anderson Roy D. “New Developments in Piston Rings for High BMEP Engines.” Paper 690753 SAE National Powerplant Meeting Cleveland October 1969
- Mayer W. J. Krause D. B. Moore C. P. Murphy C. B. “Oil Consumption Measurements of Individual Cylinders in Automotive Engines.” Research Publication GMR920 Research Laboratories, General Motors Corp. Warren, Mich. Oct. 8 1969