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Abstract
Diesel engines used as main engines of fishing vessels often need to be inspected, maintained, and repaired before the boat goes offshore to ensure safety and efficiency when operating at sea for long periods. In particular, the nozzle is removed to calibrate the fuel injection pressure to the standard value so that the engine's performance criteria meet the requirements. One of the parameters that can help evaluate the decrease in injection pressure during engine operation is the amount of soot emission, through which the condition of the fuel injector can be assessed, contributing to Appropriate maintenance and repair solutions, limiting time and expense. This article presents the content of simulation research using AVL Boost software on 4CHE Yanmar engines of fishing vessels. The results showed that the fuel injection pressure decreased by 5-10% compared to the standard, making for the soot emission increase of over 20%.
Keywords: diesel engines, fishing vessels, soot, injection pressure, AVL-Boost