scholarly journals Electronic Control Technology for Marine Diesel Engines

2011 ◽  
Vol 46 (5) ◽  
pp. 730-733
Author(s):  
Koji Edo
1996 ◽  
Vol 31 (1) ◽  
pp. 35-44
Author(s):  
Shinji Baba ◽  
Tadataka Asada ◽  
Satoshi Suzuki ◽  
Tadashi Kawasaki ◽  
Toshiaki Hada ◽  
...  

Author(s):  
А.В. Игнатенко ◽  
М.М. Фролов ◽  
С.А. Худяков

Эксплуатации судовых малооборотных дизелей с электронным управлением свидетельствует о том, что со временем появляются повреждения и отказы, связанные с естественными износами пар трения, особенно прецизионных, в силовой гидравлической системе (СГС), топливных насосах высокого давления и форсунках, а также выпускных клапанах с гидравлическим приводом. Фирмы изготовители судовых малооборотных дизелей для улучшения эксплуатационных показателей и повышения ресурсов указанных деталей широко используют новые более износостойкие и жаропрочные материалы, такие как высокоуглеродистые легированные стали, нержавеющие стали, сплавы на основе кобальта – стиллиты, сплавы на основе никеля – нимоники и инконели, в частности для выпускных клапанов. Такое решение позволяет повысить надёжность деталей, увеличить межремонтные периоды и гарантировать более длительный срок службы, одновременно снизив эксплуатационные затраты, несмотря на некоторое повышение стоимости этих деталей. Приведены характеристики указанных материалов ожидаемые и подтвержденные данные об увеличенных межремонтных интервалах. The operation of low-speed marine diesel engines with electronic control indicates that over time, damage and failures appear associated with natural wear of friction pairs, especially precision ones, in the power hydraulic system, high-pressure fuel pumps and injectors, as well as hydraulically operated exhaust valves. Engine makers / manufacturers in the due course of marine low-speed diesel engines performance improvement and enhancement sourced the way to extend the lifetime for these parts by utilizing modern highly reliable wear-resistant and heat-resistant materials, including high-percentage carbon steels, stainless steels, cobalt-based alloys - stillites, nickel-based alloys - nimonic and inconel, in particular for exhaust valves. This solution allows to increases the reliability of parts, extend “in between the overhaul” periods and guarantees longer service life, and at the same time to lower the operating costs, despite a slight increase in the initial investments related to the higher cost of these parts. The characteristics of the above materials are listed and the service data related to between the overhaul periods are included.


2017 ◽  
Vol 19 (5) ◽  
pp. 584-596 ◽  
Author(s):  
Ying Hu ◽  
Jianguo Yang ◽  
Nao Hu ◽  
Lei Hu ◽  
Zhengyan Qian ◽  
...  

Modern diesel engine systems rely more and more on electronic control systems. The benefits of such electronic control systems include reduced fuel consumption, limited emissions and enhanced performance. Following the trend, this article aims to derive an appropriate methodology for improving the performance of the speed regulation by upgrading an existing mechanical governing control system to an electronic one for the marine diesel engine. Hardware-in-loop simulations and the diesel engine test-bed experiments are applied to realize a V-type mode study of the speed control strategies for the marine medium-speed diesel engines. First, the algorithm of the strategies and the functions of the electronic control unit are verified through hardware-in-loop test bench which is established using hardware devices and a software tool chain from ETAS GmbH. Additionally, the specific parameters are modified and calibrated finely on the test bed with an online debugging system. Finally, to demonstrate the performances and the generality of the proposed control strategies, the test-bed results of the two types of marine diesel engines are illustrated. The experimental results indicate that a better performance is achieved by replacing the original controller with the proposed controller. And the methodology of the control strategies development is proven to be efficient.


1990 ◽  
Vol 27 (04) ◽  
pp. 237-249
Author(s):  
Anastassios N. Perakis ◽  
Bahadir Inozu

Some essential steps for the application of reliability, availability, and maintainability (RAM) techniques to marine diesel engines are presented. The paper begins with a summary of the basic concepts of reliability engineering, followed by a survey of the relevant literature on RAM applications to the marine industry and to marine diesel engines in particular. Next, the results of an informal survey of the reliability, maintenance, and replacement practices of Great Lakes operators are presented. Finally, the first two steps for a RAM application, failure modes and effects analysis and fault tree analysis, are introduced and applied for a prototype Colt-Pielstick marine diesel engine.


2015 ◽  
Author(s):  
Jerry Ng ◽  
Kaisa Honkanen

Emulsified fuel technology has been developed since the early 1980’s to the improve combustion efficiency of marine diesel engines by creating a secondary atomization effect after the initial fuel injection. The main challenge is to measure the improved sfoc of ships accurately and reliably. This paper presents a proposed method to measure the sfoc accurately and reliably to the order of 1%. Electronic governor also poses new challenge to measuring the sfoc of ships burning emulsified fuel. Meanwhile, fuel types supplied to ship owners are of increased varying properties although still complying to ISO8217 standard. This paper describes the innovations in emulsified fuel technology that were developed to meet these challenges.


Author(s):  
Л.Б. Леонтьев ◽  
Н.П. Шапкин ◽  
А.Л. Леонтьев ◽  
В.Н. Макаров ◽  
А.В. Арон

Повышение долговечности трибосопряжений судовых дизелей, определяющих их ресурс, представляет собой актуальнейшую проблему, обусловленную как безопасностью мореплавания, так и экономическими факторами. Основной причиной отказов коленчатых валов двигателей, определяющих необходимость капитального ремонта, является износ шеек. Решение проблемы повышения износостойкости и, соответственно, долговечности связано с применением трибоактивных присадок в смазку. Несмотря на глубокие и обстоятельные исследования в области применения органо-неорганических материалов для использования в качестве присадок в моторное масло для повышения долговечности трибоузлов осуществить выбор оптимального материала для конкретных условий практически невозможно, так как исследования выполнены для различных условий эксплуатации и по различным методикам. Цель работы – разработка триботехнической присадки к моторным маслам, обеспечивающей повышение надежности и эффективности технической эксплуатации судовыхсреднеоборотных дизелей путем формирования тонкопленочного металлокерамического покрытия на поверхностях трения стальных деталей трибоузлов, позволяющего получить оптимальный комплекс параметров материала износостойкого покрытия. В работе представлены исследования эксплуатационных свойств присадок в моторное масло 17 органо-неорганических триботехнических материалов 4 групп — природные и искусственные полимеры, из которых были изготовлены свыше 20 композиций и композитов. Установлено, что наиболее перспективным является использование нанокомпозитов на основе вермикулита, модифицированного кислотой, в качестве присадок в моторное масло, так как они обладают минимальными коэффициентом трения при граничной смазке (0,007–0,014) а также высокой износостойкостью стали 40Х и обеспечивают минимальную величину скорости изнашивания вкладыша подшипника, благодаря чему повышается ресурс трибосопряжения более, чем в 3 раза, и соответственно снижаются эксплуатационные расходы. Increasing the durability of the tribo-couplings of marine diesel engines, which determine their resource, is an urgent problem due to both the safety of navigation and economic factors. The main reason for engine crankshafts failures, which determine the need for major repairs, is the wear of the necks. The solution to the problem of increasing wear resistance and, accordingly, durability is associated with the use of triboactive additives in the lubricant. Despite in-depth and thorough research in the field of application of organo-inorganic materials for use as additives in engine oil to increase the durability of tribo-nodes, it is almost impossible to choose the optimal material for specific conditions, since the studies were carried out for various operating conditions and according to various methods. The purpose of the work is to develop a tribotechnical additive to motor oils that provides an increase in the reliability and efficiency of technical operation of medium-speed marine diesel engines by forming a thin-film metal-ceramic coating on the friction surfaces of steel parts of tribo-nodes, which allows to obtain an optimal set of parameters of the wear-resistant coating material. The paper presents studies of the operational properties of additives in engine oil of 17 organo-inorganic tribotechnical materials of 4 groups — natural and artificial polymers, from which more than 20 compositions and composites were made. It has been established that the most promising is the use of nanocomposites based on vermiculite modified with acid as additives in engine oil, since they have a minimum coefficient of friction with boundary lubrication (0.007-0.014) as well as high wear resistance of 40X steel and provide a minimum wear rate of the bearing liner, thereby increasing the tribo-tension life by more than 3 times, and, accordingly, operating costs are reduced.


2018 ◽  
Vol 10 (12) ◽  
pp. 168781401881407
Author(s):  
Yasin Karagöz ◽  
Majid Mohammad Sadeghi

In this study, it was aimed to operate today’s compression ignition engines easily in dual-fuel mode with a developed electronic control unit. Especially, diesel engines with mechanical fuel system can be easily converted to common-rail fuel system with a developed electronic control unit. Also, with this developed electronic control unit, old technology compression ignition engines can be turned into dual-fuel mode easily. Thus, thanks to the flexibility of engine maps to be loaded into the electronic control unit, diesel engines can conveniently be operated with alternative gas fuels and diesel dual fuel. In particular, hydrogen, an alternative, environmentally friendly, and clean gas fuel, can easily be used with diesel engines by pilot spraying. Software and hardware development of electronic control unit are made, in order to operate a diesel engine with diesel+hydrogen dual fuel. Finally, developed electronic control unit was reviewed on 1500 r/min stable engine speed on different hydrogen energy rates (0%, 15%, 30%, and 45% hydrogen) according to thermic efficiency and emissions (CO, total unburned hydrocarbons, NOx, and smoke), and apart from NOx emissions, a significant improvement has been obtained. There was no increased NOx emission on 15% hydrogen working condition; however, on 45% hydrogen working condition, a dramatic increase arose.


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