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Abstract How to increase engine power and reduce fuel consumption and emission is an important target that engine designers try to achieve it. One of the most promising approaches to realise this goal is adding nano additives to fuel. Titanium dioxide (TiO 2 ) blended with biofuels get wide studies by researchers using conventional diesel engines at different operating regimes. This work aims to prolong these investigations using diesel fuel, rather than biofuels, on a high injection pressure (1400 – 1600 bar) common rail diesel engine at wide operating conditions and different TiO 2 concentrations. Experimental outcomes show an increase in peak cylinder pressure up to 8.51% than pure diesel when using 100 ppm TiO 2 concentration. Also, BSFC has been decreased by 36%, and BTE increased by 48% compared to pure diesel at high speeds and loads. NO x and CO 2 emissions raised by 35.3% and 40.3% respectively, while CO emissions decreased by 35%. These results could be a reason for further studies for TiO 2 using different sizes, at wider engine regimes and mixture strengths.
Moaayet et al. (Mon,) studied this question.