ANALISIS PENYEBAB MENURUNNYA PERFORMA INJECTOR PADA MESIN INDUK KM. DORO LONDA

Abstract

Rahmadiani, Syahrifah Salsabila, 2025 "Analysis of the Causes of Declining Injector Performance in KM Main Engines. London Burns" The injector is one of the vital components in the combustion system of the diesel main engine, which functions to spray fuel into the combustion chamber in the form of a fine mist so that combustion can take place optimally. Decreased injector performance can have a serious impact on engine efficiency, fuel consumption, and exhaust emissions. This study aims to analyze the main causes of declining injector performance in KM main engines. Doro Londa, with a focus on two dominant factors, namely blockages in the nozzle and low fuel quality. The method used in this study is a qualitative descriptive approach, with data collection techniques in the form of direct observation, interviews with ship engineers, and documentation during sea practice. The data was analyzed using a case study and problemsolving approach, and supported by log book data and ship manuals. The results showed that injector nozzle clogging is generally caused by incomplete combustion due to poor fuel quality and lack of periodic maintenance. In addition, the bunker process that is not in accordance with procedures also causes dirt and water to enter the fuel system. As a solution, injector maintenance is carried out periodically through cleaning, pressure testing, and replacement of components that have passed working hours. These efforts have been proven to be able to restore injector performance and maintain the work efficiency of the main engine. This research is expected to be a reference for ship engine officers in carrying out combustion system maintenance, as well as making a scientific contribution to the development of engine maintenance management in the shipping world.