Van Vang Le, Thanh Hai Truong, Thi Minh Hao Dong


Ho Chi Minh city University of Transport, Ho Chi Minh city, Vietnam

*Corresponding Author Email: minhhaodong@gmail.com

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

It should be determined that the marine engine operation at a low load operation (especially 40% or less) is not conducive to the operation of the engine and related equipment. However, manufacturers accept and allow the engine to operate continuously at such a low load condition. The mode operates at a low load of marine engines that drive the propeller is used quite recently in various reasons. The S46 ME-B8.5 engine concept consists of a hydraulicmechanical system for activation of the fuel injection. The fuel pressure booster consists of a simple plunger powered by a hydraulic piston activated by oil pressure. An electronically controlled proportional valve controls the oil pressure. The exhaust valve is activated by a light camshaft, driven by a chain drive placed in the aft end of the engine. However, at low load operation, the MAN B&W S46ME-B8.5 engines have generated several incidents that greatly affect the operation of the ship including a malfunction on the exhaust valve and troubles of jamming plungers of the high-pressure pump during engine acceleration and start-up. Therefore, it is essential to learn and identify structural and operational characteristics of the S46 ME-B8.5 engines. Moreover, it is necessary to analyze the effects on the process of low-load operation as sailing. The paper focuses on studying the operating characteristics of engines in low load mode, assessing the effects of this mode on engines and related machines. Besides, this study also developed the operation process for S46ME-B8.5 engines. In this paper, the authors propose solutions to effectively operate the S46 ME-B8.5 engines in low load mode when traveling on the sea.