Effect of metal oxide nanoparticles and engine parameters on the performance of a diesel engine: A review

In today's growing population, it can be easily formulated that fossil fuels will eventually get depleted one day; which increases the need for an alternative fuel to satisfy the energy demands of the world. Bio-diesel is one of the prime available sources to fulfil the demand. With the use of alternate fuels such as biodiesel, environmental emission can be reduced but with a slight compromise of decrease in engine performance. There is additional scope for improvement in fuel properties and engine characteristics by addition of metal oxide nanoparticles as fuel additives. Improvement in engine performance may also be achieved by varying the engine operating parameters such as compression ratio (CR), injection timing (IT) and injection pressure (IP) which are used in improving the engine performance. Hence, in the current paper, the effect of operating parameters CR, IT and IP on the engine performance and also along with some other parameters as modification of combustion chamber shapes, nozzle geometry and addition of oxygenated additives on engine performance has been explained. (C) 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Mechanical and Energy Technologies.