Abstract
Exhaust Gas Recirculation (EGR) solution for decreasing the NOx emissions is one of the effective measures and widely applied for general diesel engines and marine engines as well. This method has been mainly implemented for the new engines; however it is lack of the same studies for the existing ones. Facing to the compulsory regulations of the MARPOL Annex VI on NOx emissions control, it can be seen that the current diesel engines on-board the Vietnamese sea-going fleets need more and more applicable and feasible solutions. Hence, an experimental study on evaluating the NOx reduction effectiveness of the EGR measure will be one of them in order to be referred as a positive and convincible basis for next steps of realization.