Abstract
In order to cope with stricter environmental restriction, the electronic management of engines used in marine applications, is one of the most effective solution to decrease the antinomy between NOx and CO2 emissions.Electronically-managed two-stroke engines have already been launched in the market. However, a low speed 4-stroke engine of such kind has not yet been introduced because of its cost-performance relationship.The development of this project has been aimed at improving combustion efficiency, reducing NOx , and minimizing cylinder lubricant dosage rate in a wider operating range not only at the rated power zone but also at the partial load zone, by managing electronically the characteristics of fuel injection, intake and exhaust valve timing and cylinder lubricator control, threrby utilizing the inherent advantages of the 4-stroke engine.
