Özet:

This study focuses on the improvement of fuel properties of waste frying oils and their direct use without chemical processing. For this purpose, 10% filtered waste frying oil was added to the diesel fuel. Afterwards, the test fuels were formed by adding 5%, 10% and 20% volumes of Di Ethylene Butyl Glycol Ether to this mixture. The obtained fuel mixtures were run in a diesel engine at a con-stant engine speed of 3000 rpm at 20%, 40%, 60% and 80% engine loads, and the changes in engine fuel consumption, exhaust gas temperature and ego emissions were investigated. The results showed that all the goose emissions increased with the direct use of waste oil, but the exhaust emissions decreased with the addition of Di Ethylene Butyl Glycol Ether. With the addition of Di Ethylene Butyl Glycol Ether, the viscosity and density values decreased and the heating value in-creased. The best fuel mixture was obtained with DAGD20 mixture with 20% Di Ethylene Butyl Glycol Ether added. In this fuel mixture, BSFC decreased, Ex-haust Gas Temperature increased, NOx increased, CO increased, CO2 decreased, HC increased, and smoke decreased.

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