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Development of an Engine Head Friction Tester
Technical Paper
1999-01-3671
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An engine head friction tester that has excellent repeatability, can differentiate between oils with good and poor friction properties and can also obtain steady sequential data for many hours has been developed. It was formerly thought that data variations were inevitable in this type of tester. However, analysis of specific factors of the variations showed that the main factors involved in the variation were the temperature gradient between the head and the torquemeter and the temperature change resulting from the aforementioned temperature gradient. Next, by almost completely separating the head side from the torquemeter side thermally and by taking measures to maintain both sides at their respective constant temperatures, along with other countermeasures, a tester having the special properties indicated above was developed. This paper describes some test results demonstrating the advantages listed above.
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Citation
Nakagawa, I., "Development of an Engine Head Friction Tester," SAE Technical Paper 1999-01-3671, 1999, https://doi.org/10.4271/1999-01-3671.Also In
References
- Izumida H. et al. “A study of the Effects of Ceramics Valve Train Parts on Reduction of Engine Friction Evaluation of high strength Si3N4 tappet shims by motoring apparatus” JSAE, 9535990 1995-5
- Yaguchi A. et al. “Influence of Engine Oil Composition in Valve Train Friction” JSAE, 9437674 1994-10
- Nagashima T. et al. “Research on Low-Friction Properties of High Viscosity Index Petroleum Base Stock and Development of Upgraded Engine Oil” SAE Paper 951036 1995
- Soejima K. Ejima Y. et al. “Friction and Wear of Com and Ceramics Tappet” Journal of Japanese Society of Tribologist 39 1 43 50 1994
- Ito A. Yang L. et al. “A study on Cam Wear Mechanism with a Newly Developed Friction Measurement Apparatus” SAE Paper 982663 1998
- Toyama M. et al. “Mechanism of Friction reduction by Friction Modifier(2)” Proc. Annual Mtg. Japan. Soc. Tribology (Tokyo)
- Yasuda Y. “Friction Reduction for Cam and Follower in Valve Train System of Automotive Engine” Journal of Japanese Society of Tribologist 43 10 861 866 1998