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An Improved CFR Cetane Rating Method
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Sector:
Event:
Mid-Year Meeting
Language:
English
Abstract
Cetane ratings by ASTM D 613 method are not very accurate. Moreover, the standard deviation for ratings varies according to the properties of the fuel tested. An investigation of combustion in the CFR cetane rating engine has revealed pronounced combustion instability at the standard rating conditions. Changes to the operating conditions can stabilize the combustion and thus potentially improve rating accuracy.
A new cetane rating technique, using the CFR engine, has been developed and tested in a correlation program involving six engines and five fuels. This has shown that the modified rating method gives improvements of 25% in repeatability and reproducibility standard deviation compared with the ASTM method, and gives the same value for cetane number. The new method uses the same equipment as the standard method, is easier to operate, and lends itself to automation
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Authors
Citation
Burt, R. and Troth, K., "An Improved CFR Cetane Rating Method," SAE Technical Paper 680464, 1968, https://doi.org/10.4271/680464.Also In
References
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- Boerlage G. B. Broeze J. J. “Knock-Rating for High-Speed C.I. Engine Fuels.” Proc. World Pet. Congress 1933 II 271
- Garner F. H. Morton F. Saunby J. B. “Pre-Flame Reactions in Diesel Engines, Part V. A Study of Temperature Pressure and Ignition Delay.” J. Inst. Petrol. 47 470 June 1961 175