Journal article

Design and Analysis of a Modified CFR Engine for the Octane Rating of Liquefied Petroleum Gases (LPG)

Kai Morganti, Tien Mun Foong, Michael Brear, Gabriel Da Silva, Yi Yang, Frederick Dryer

SAE INTERNATIONAL JOURNAL OF FUELS AND LUBRICANTS | SAE INT | Published : 2014

Abstract

This paper presents a combined experimental and numerical study of a modified Cooperative Fuel Research (CFR) engine that allows both the Research and Motor octane numbers (RON and MON) of any arbitrary Liquefied Petroleum Gas (LPG) mixture to be determined. The design of the modified engine incorporates modern hardware that enables accurate metering of different LPG mixtures, together with measurement of the in-cylinder pressure, the air-fuel ratio and the engine-out emissions. The modified CFR engine is first used to measure the octane numbers of different LPG mixtures. The measured octane numbers are shown to be similar to the limited data acquired using the now withdrawn Motor (LP) test ..

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Grants

Funding Acknowledgements

This research was supported by the Advanced Centre for Automotive Research and Testing (ACART) and the Australian Research Council. The authors also wish to acknowledge Mr Jeff Balis of GE Power & Water (Waukesha CFR/FIT) for providing the information on the Motor (LP) method.