• HARDIK A. PATEL
• Dr. Bhavesh P. Patel

One of the most promising alternative fuels for diesel engines is biodiesel, which can be produced from vegetable oils and is potentially renewable, non-toxic, biodegradable, clean burning, high lubricity, and low impact on the environment. It can also be used directly in diesel engines without requiring significant engine modifications. Because of their fuel efficiency, dependability, and durability, diesel engines are being used in a wide range of industries and applications, including transportation, industry, agriculture, and power production. The demand for energy from fossil fuels is rising, which is resulting in higher usage and more emissions. Global warming and air pollution are both caused by these emissions. The need for alternate resources has consequently grown. Alternative energy sources like solar, wind, biomass, tidal wave energy, and biodiesel made from vegetable, seed, and animal fats are currently available for the creation of electricity. Among them, biodiesel might satisfy a portion of the world's demand. Without requiring any modifications, biodiesel and its mixes can be utilized in standard diesel engines to improve operating effectiveness and reduce pollution emissions. Many different plants, including palm, jatropha, cotton, sesame, linseed, honge, rubber seed, and others are used to extract biodiesel. Because of its higher density, surface tension, and viscosity than diesel, biodiesel influences the atomization of fuel by enlarging the size of the fuel droplet. One of the friendliest alternative fuels for diesel engines is biodiesel, which offers power comparable to that from regular diesel fuel. They can be found anywhere and are renewable. The biodiesel can be utilized in any ratio in a diesel engine with little to no engine modification required. One of its greatest benefits is supposed to be this. Evidently, there is no need to update the present internal combustion engine technology or any infrastructure. In the present study the review of performance and emissions studies of Variable compression ratio engines were used to test the performance and emissions of neem biodiesel blends. The everlasting neem, which is widely accessible and has a variety of uses, could be used as a feedstock for biodiesel.

VCR; Neem oil; biodiesel; Additive; Emission; I. C. engine.

"PERFORMANCE AND EMISSION STUDIES OF VARIABLE COMRESSION RATIO ENGINE USING NEEM OIL BASED BIO DIESEL ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 2, page no.g331-g353, February-2024, Available :http://www.jetir.org/papers/JETIR2402644.pdf

"PERFORMANCE AND EMISSION STUDIES OF VARIABLE COMRESSION RATIO ENGINE USING NEEM OIL BASED BIO DIESEL ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 2, page no. ppg331-g353, February-2024, Available at : http://www.jetir.org/papers/JETIR2402644.pdf