Simulation Analysis on Wearing Quantity of Marine Low-Speed Diesel Engine’s Piston Ring

This paper establishes the mathematical model of the piston ring’s wearing capacity for the marine diesel engine, studies the influence of the piston ring’s axial motion and radial motion to the magnetic field’s output signal, computes and analyzes the corresponding relationships of the magnetoresistive sensor’s output and the piston ring’s wearing capacity, and does the on-board experiment on the oil tanker with the 6RTA52U diesel engine. Measuring actually the magnetoresistive sensor’s output corresponding to the piston ring’s wearing capacity of the marine diesel engine confirms the correctness for the mathematical model of the wearing capacity. The research conclusions lay the technical foundation for the online monitor of the piston ring’s wear.

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Model tests of a marine diesel engine powered by a fuel-alcohol mixture

Combustion Engines ◽

10.19206/ce-143486 ◽

2021 ◽

Author(s):

Marcin Zacharewicz ◽

Tomasz Kniaziewicz

Keyword(s):

Mathematical Model ◽

Diesel Engine ◽

Alternative Fuels ◽

Fossil Fuels ◽

Diesel Oil ◽

Marine Diesel Engine ◽

Engine Model ◽

Marine Engines ◽

Marine Diesel ◽

The Mathematical Model

The paper presents the results of model and empirical tests conducted for a marine diesel engine fueled by a blend of n-butanol and diesel oil. The research were aimed at assessing the usefulness of the proprietary diesel engine model in conducting research on marine engines powered by alternative fuels to fossil fuels. The authors defined the measures of adequacy. On their basis, they assessed the adequacy of the mathematical model used. The analysis of the results of the conducted research showed that the developed mathematical model is sufficiently adequate. Therefore, both the mathematical model and the computer program based on it will be used in further work on supplying marine engines with mixtures of diesel oil and biocomponents.

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Problems of Mathematical Modeling of the Marine Diesel Engine Working Cycle for the Diagnostic Purposes

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.236.212 ◽

2015 ◽

Vol 236 ◽

pp. 212-219

Author(s):

Aleksy Cwalina ◽

Tomasz Kniaziewicz ◽

Marcin Zacharewicz

Keyword(s):

Mathematical Model ◽

Diesel Engine ◽

Computer Program ◽

Combustion Engine ◽

Synchronous Generator ◽

Marine Diesel Engine ◽

Working Cycle ◽

Marine Diesel ◽

Simplifying Assumptions ◽

The Mathematical Model

In the paper the first phase of a mathematical model construction of processes occurring in the cylinder during the working cycle of marine internal combustion engine is presented. The physical model of the mechanical and thermodynamic processes taking place when marine diesel engine drives a synchronous generator is described. In addition, assumptions of the mathematical model developed for marine engine diagnostics are discussed. The input parameters of the model and some simplifying assumptions have been presented. In parallel with the mathematical model, a computer program was created to facilitate carrying out the calculations. Descriptions of the mathematical model and a computer program are illustrated by means of graphs of selected parameters of combustion engine as a function of rotation angle of the crankshaft.

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Experimental Study on Wear Monitoring of Marine Diesel Engine’s Piston Ring by Magnetoresistive Sensor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.424-425.132 ◽

2012 ◽

Vol 424-425 ◽

pp. 132-136

Author(s):

Guo Jin Chen ◽

Zhang Ming Peng ◽

Jian Guo Yang ◽

Qiao Ying Huang

Keyword(s):

Diesel Engine ◽

Large Scale ◽

Piston Ring ◽

Test Bed ◽

Operating Modes ◽

Magnetoresistive Sensor ◽

Marine Diesel ◽

Wear Monitoring ◽

Oil Tanker ◽

Test Result

On the diesel engine’s test bed, this paper has studied the parameters regarding the diesel engine’s rotational speed, the piston ring’s width and wearing capacity and so on, and their relation with the output signal of the magnetoresistive sensor under the reverse drawing of the diesel engine. The research discovered that the piston ring’s wear and the magnetoresistive sensor’s output have the corresponding relationship. And on the oil tanker with the 6RTA52U diesel engine, the influence of the diesel engine’s operating parameters and the load situations to the magnetoresistive sensor’s output is surveyed under four kinds of different operating modes. The test result and the research conclusion provide the technical foundation for the online Wear monitoring of the large-scale marine diesel engine’s piston ring.

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