scholarly journals Effects of Biodiesel Fuel on Lubricating Oil of Marine Diesel Engine

2012 ◽  
Vol 47 (1) ◽  
pp. 77-82 ◽  
Author(s):  
Katsuo Hasegawa ◽  
Hiroyasu Mizoguchi ◽  
Ken’ichi Oda ◽  
Yuichi Ihara ◽  
Takehiro Nawa ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Lubricating Oil ◽  
Biodiesel Fuel ◽  
Marine Diesel Engine ◽  
Marine Diesel

Research of Marine Diesel Engine’s State Prediction Based on Evolutionary Neural Network and Spectrometric Analysis

2011 ◽  
Vol 346 ◽  
pp. 339-345 ◽  
Author(s):  
Hai Jun Wei ◽  
Guo You Wang
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Genetic Algorithms ◽  
Diesel Engine ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Lubricating Oil ◽  
Spectrometric Analysis ◽  
Marine Diesel Engine ◽  
Marine Diesel

In this paper, an evolutionary neural networks model is proposed to predict the content of metal elements contained in marine diesel engine lubricating oil, by fusing genetic algorithms (GAs) and error back propagation neural network (BPNN) to offset the demerits of one paradigm by the merits of another. The input data of metal content was detected by spectrometric analysis. Genetic algorithms are used to globally optimize the weights and threshold of BP neural networks. Moreover, one case study was presented to illustrate the proposed method. The prediction accuracy of the novel method is compared with that of only BPNN method to illustrate the feasibility and effectiveness of the proposed method. The relative error on average of results is 1.52%, it can meet the precision request of state detecting in marine diesel engine.

Some Current Types of Marine Diesel Engine

1949 ◽  
Vol 160 (1) ◽  
pp. 312-340 ◽  
Author(s):  
C. C. Pounder
Keyword(s):  
Diesel Engine ◽  
Mechanical Efficiency ◽  
Lubricating Oil ◽  
Lower Grade ◽  
Marine Diesel Engine ◽  
Current Interest ◽  
Design Changes ◽  
Fuel Oils ◽  
Marine Diesel ◽  
Stroke Engine

The paper comprises brief descriptions of three distinctive types of marine Diesel engine, and some expressions of opinion upon a number of matters of current interest. The types considered are double-acting, two-stroke engines; single-acting, two-stroke, crosshead engines; and single-acting, two-stroke, trunk engines. The author restricts his remarks to some of the engine types with which, for many years past, his work has lain. Some matters of detail dealt with are the timing of cylinder lubricators, piston rings, pistons and liners, piston rod stuffing boxes, piston rod scraper boxes, feed pumps and valves, scavenge blowers and lubricating oil systems. Indicated horse-power and mechanical efficiency also find a place, together with crankcase safety precautions, vibration and noise, and materials of construction. The author also deals with surface finish, the effect of design changes upon maintenance, the use of lower-grade fuel oils, scavenging, and engine rating, and concludes with a reference to the comparison of Diesel and steam machinery and tables of typical sea-service results of a 6,000 s.h.p., double-acting, two-stroke engine.

scholarly journals Cyclic Variation Analysis of Palm Biodiesel Fuel in Low Compression Marine Diesel Engine

2020 ◽  
Vol 75 (2) ◽  
pp. 43-58
Author(s):  
Che Wan Mohd Noor ◽  
Rizalman Mamat ◽  
Obed Ali ◽  
Gholamhassan Najafi ◽  
Wan Nur Diyana Mansor
Keyword(s):  
Diesel Engine ◽  
Biodiesel Fuel ◽  
Marine Diesel Engine ◽  
Cyclic Variation ◽  
Variation Analysis ◽  
Marine Diesel

Lubrication analysis for the piston ring of a two-stroke marine diesel engine taking account of the oil supply

2019 ◽  
pp. 146808741987211 ◽  
Author(s):  
Tongyang Li ◽  
Xuan Ma ◽  
Xiqun Lu ◽  
Chuanjuan Wang ◽  
Bowen Jiao ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Lubricating Oil ◽  
Design Parameters ◽  
Bench Test ◽  
Marine Diesel Engine ◽  
Oil Film ◽  
Oil Supply ◽  
Marine Diesel ◽  
The Impact

The piston ring is one of the most important parts of a two-stroke marine diesel engine. It is lubricated by a special mode in which the lubricating oil is directly injected into the liner’s inner surface. In this article, taking account of the oil supply, a piston ring lubrication model is developed based on oil mass conservation. The lubrication region of this piston ring–cylinder liner is divided into inlet, core lubrication, and outlet regions, with the oil supply being converted into an oil film. The impact of the width of the core lubrication region on squeezing of the oil is considered. To verify the model, friction force measurements are performed in a reciprocating bench test under fully flooded conditions, and the model is further validated by comparing the minimum oil film thickness with data from the literature. The model is applied to the top ring of a two-stroke marine diesel engine, and the impacts of the oil supply and its design parameters are analyzed.

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