Özet:

Lubrication circuit is one of the most important ones in the engine, as engines cannot run smoothly for more than few minutes without lubricating oil ,the serious drawback of now day petroleum based lubricating oil is emission. This problem may be overcome by the using vegetable oils such as coconut oil as it shares most of the salutary properties of other vegetable oils like lubricity, high flashpoint of 225⁰ C which is more than 2T oil. This paper focuses on evaluation of performance of coconut oil as a alternative lubricating oil and its effect on the engine performance, experiments are conducted with standard injection parameters, at constant speed , and at different loads ,various parameters like Brake power, specific fuel consumption, total fuel consumption, Thermal efficiency & emission were studied, with the results so obtained the performance curves were drawn and compared to ascertain the suitability of using coconut oil as lubricant in two stroke SI engine, and experimental results show that there is less emission and reduced Total fuel consumption.

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