The relationship between the condition of diesel engine and thermal parameters is too complicated to utilize threshold method diagnose engine's fault. A fuzzy logic used develop a fault diagnosis system for engine, with an aim identify related lack power single cylinder. It proven that this capable identifying automatically cylinder, which helpful apply under ship environment.

A one-dimensional model of the diesel engine working process was established, and thermal boundary conditions gases contacting with a cylinder head were determined by comparing them results routine test. fluid-structure interaction between cooling water passages established in which obtained computational fluid dynamics analysis. Simultaneously, considering pressure mechanical load cylinder, temperature stress distribution analysed thermo-mechanical coupling load. The validated using...

The common rail pressure of a marine diesel engine high-pressure system is typically controlled by PID (Proportional Integral Differential) algorithm, which has problems with both overshoot and response delay. In this paper, the control method based on object model for studied. established within controller. Through developed current actual obtained real-time acquisition, variables issued controller to are predicted calculated. fuel supply required in whole calculated advance, then taken as...

Engine shaft instantaneous angular speed (IAS) can be used to diagnose combustion related faults and other affecting the output of engines, especially for small-scale diesel generators. Unfortunately, it is difficult apply this technology monitoring operational condition a marine propulsion engine due its complex shafting systems multiple factors torsional vibration. In paper, characteristics fault detection based on traditional IAS analysis methods are firstly analysed. A novel method has...

The method of monitoring the wear piston ring with a magneto-resistive sensor for marine diesel engine is presented in paper. magnetic field intensity variations caused by both and motion are analyzed simulation. theoretical basis provided.

Modern diesel engine systems rely more and on electronic control systems. The benefits of such include reduced fuel consumption, limited emissions enhanced performance. Following the trend, this article aims to derive an appropriate methodology for improving performance speed regulation by upgrading existing mechanical governing system one marine engine. Hardware-in-loop simulations test-bed experiments are applied realize a V-type mode study strategies medium-speed engines. First, algorithm...

Early fault detection for marine diesel engines is very important to ensure reliable operation throughout the course of their service. An early method introduced in this paper based on thermal parameters, and a predication system engine developed abnormal data mining technology, which acquires parameters from local safety, alarm control through field bus, manages by database, predicts condition statistic miming technology. It found that effective at stage.

A comprehensive summary of the vibration diagnosis techniques used to detect wear main journal bearings in a diesel engine is presented. The load bearing, minimum thickness oil film, film pressure and locus crankshaft centre have been calculated based on measured thermal parameters. Simulated experiments for bearing carried out laboratory conditions. strain pedestals vertical direction were under various working signals pedestal are related forces, damped by lubricant oil. excitation sources...

In this paper, the high-pressure common rail system of marine diesel engine is taken as case study to establish a real-time simulation model that can be used controlled object control system. On premise ensuring accuracy, should also respond quickly instructions issued by The development based on modular modeling method, and divided into submodels, including oil pump, tube, injector, mass conversion. submodels are built using “surrogate model” which mainly composed MAP data empirical...

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The piston ring is one of the important movement parts diesel engine and function impact performance directly. Therefore, dynamic rings RTA52U marine were simulated in this paper, then typical motion law characteristic at working states researched. This paper provides effective approaches theoretical basis for commanding wear engine.

Digital printing has the advantages of variable data, according to demand, individuation service. Therefore, its appropriation in market field is increasing year by year, and quality draws near offset printing. This paper carries out experiment does research into tone reproduction characteristic on color representation ability Indigo3500 based electric ink Canon 7000VP digital machine carbon powder By obtaining dot curve gamut range comparing effect with Heidelberg CD102, this gets...

In this paper, based on the characteristic analyzing of mechanical fuel injection system for marine medium-speed diesel engine, a sectional high-pressure common rail is designed, rated condition pressure which 160MPa. The simulation model built and performance high analyzed, research results provide technical foundation engineering development.

High-power diesel engine working process simulation and experiment are important means for design development performance optimization. A high-power was selected as the research object in paper, theory method were analyzed. Various system models established during by GT-POWER software, thermal parameters simulated. Simultaneously, methods analyzed dynamic, economic reliability measured. Finally, model verification error analysis performed contrast between results. Research indicates that...