Failure Of Fuel System Research Articles

Failure Analysis of Fuel System Main Engine Fishing Vessel (Case Study : KM. Sumber Mutiara)

Failure analysis on the fishing vessel's main engine is one of the works that must be completed because it is crucial for the operation of the ship. Analysis of determining the cause and effect of the failure main engine fuel system is the goal of this study. FMEA (Failure Mode and Effect Analysis) is a method used to determine priority components in failure. The use of Pareto diagrams is an additional method of analysis. RCFA (Root Cause Failure Analysis) is used to analyze the root cause of the failure of the main engine fuel system. The results obtained are the injector component (168) is the component that has the highest RPN value and is the largest contributor to failure according to the Pareto diagram. The root of the failure identified is the lack of checking before operating. The results of the recommendations obtained are the use of corrective maintenance based on the RPN value and the use of a clean filter for the fuel system. The injector is a component that needs to be maintained so as not to experience a fuel system failure on the main engine. The impact of the results of this study is that it becomes a scientific finding using FMEA and RCFA as a method of analyzing failures in the main engine fuel system on fishing vessels

A method for assessing of ship fuel system failures resulting from fuel changeover imposed by environmental requirements

Environmental regulations instigated the technological and procedural revolution in shipping. One of the challenges has been sulfur emission control areas (SECA) and requirement of fuel changeover. Initially, many reports anticipated that new grades of low sulfur fuels might increase various technical problems in ship operation. This research develops a simple and easy to use method of the failure severity and intensity assessment in relation to fuel changeover. The scale of failure rate in the ship’s fuel system was evaluated qualitatively and quantitively, using developed failure frequency indicator and the time between failure. Based on 77 records of fuel system failures collected on seven ships, it has been found that frequency of failures related to SECA fuel changeover is on average nearly three times higher compared to the rest of sailing time. Their severity did not significantly change, but the structure of failures changed considerably. The method and presented results may help in improvement of ship’s systems design and on-board operational procedures.

Istraživanje izlaznih karakteristika električnih pumpi za gorivo tokom simulacije namerno izazvanog kvara

The electric fuel pump (EFP) is one of the potential sources of fuel system failures. According to various data, the fuel system accounts for 25...50% of all failures. The most common reason for the impairment of the fuel system performance and, in particular, the failure of the fuel pump is the contamination of fuel with large or small particles, as well as the wear of the structural elements of the EFP. The purpose of the study is to determine the technical condition of electric fuel pumps of motor vehicle engines based on the use of testing technologies. The paper discusses theoretical and experimental studies of the fuel system of motor vehicle engines: the change in the current consumption rate of the EFP depending on the degree of contamination of series elements in the system and leaks in the injection unit of the EFP.

Study of Sedimentation in Jet Fuels Due to Watering Using Methods of Molecular Mechanics

Research results on the formation and structuring of disperse jet fuel systems of fuel TS-1 in contact with icing inhibition liquids and without them with water and the formation of an aggregated disperse phase, which is one of the causes of fuel system failures of aircraft, are presented.

Mechanical failure of fresh nuclear grade iron–chromium–aluminum (FeCrAl) cladding under simulated hot zero power reactivity initiated accident conditions

The reactivity initiated accident (RIA) is a postulated accident in light water reactors initiated by a rapid increase in reactivity which causes an increase in fission rate and fuel temperature. One potential mode of fuel system failure during RIA is pellet cladding mechanical interaction (PCMI) due to the rapid thermal expansion of the fuel pellet. Simulated PCMI experiments were performed by rapidly pressurizing iron-chromium-aluminum (FeCrAl) cladding tube samples using a hydraulic modified burst test system, causing the specimens to burst under a biaxial loading path. Deformation and rupture of the specimens were tracked with a telecentric lens and high-speed camera system. Outer surface strains were calculated using digital image correlation (DIC) on speckle patterns painted on the specimens’ outer surfaces. Experiments were conducted at approximately 275 °C, representative of hot zero power RIA conditions. The failure hoop strain was DIC-calculated between approximately 1.8–3.4%, corresponding to quasi-static energy depositions of approximately 110–260 calories per gram UO2 assuming initial pellet-cladding contact. These conditions are very similar to the proposed energy deposition limit of 150 calories per gram UO2 for unirradiated zirconium-based cladding in US Nuclear Regulatory Commission (NRC) Draft Regulatory Guide 1327. A very small strain rate dependence was observed in the data, with the magnitude of the failure hoop strain decreasing slightly with increasing strain rate. This observed dependence may be relevant because the FeCrAl cladding strain rate will be approximately 20% higher than in zirconium-based cladding due to the harder neutron spectrum and resultant shorter neutron generation time.

Impact Assessment of Farm Tractor Engine Fuel Injector Damage on Engine Oil Properties

Abstract It is justified that the problems related to changes in physico-chemical properties, concentration of trace elements in lubricat-ing oil and the impact of these changes and their dynamics on vehicle structural elements should be considered in detail. It is important that empirical data, theoretical relationships and test results should be taken into account. The paper presents re-search results of the selected physico-chemical parameters and the content of metals in samples of the used engine oil. The samples were collected both after the fuel system failure and during the operation of the farm tractor according to the date of changing engine oil assumed by the producer. An instrumental chemical analysis method HDXRF was used to determine chang-es of the content of trace elements Fe, Sn, Cu, Pb, P, Zn, Ca in engine oil. Additionally, changes in physico-chemical properties were determined with the use of FT-IR spectrometry. Courses of these changes were analysed on account of their impact on the utility properties of the engine oil.

ОСОБЕННОСТИ ИЗНАШИВАНИЯ ДЕТАЛЕЙ ТОПЛИВНОЙ СИСТЕМЫ «COMMON RAIL» ДИЗЕЛЬНЫХ ДВИГАТЕЛЕЙ ПРИ ЕЁ ЗАВОЗДУШИВАНИИ

The paper reports the analysis of wear peculiarities in parts of friction pairs of Bosch “Common Rail” fuel system of the fourth generation at the penetration of a large air amount in it (airing). 
 It is proved that the failure to keep a lubrication mode with fuel in moving joints of Bosch “Common Rail” (CP4) system at airing results in the friction surfaces contact with the formation of wear products as metal abrasive particles and all fuel system failure. 
 There is considered a device and the peculiarities in the operation of friction pairs of the fuel systems mentioned. Factors resulting in airing these systems in the course of operation, maintenance and repair of vehicles are emphasized. 
 It is defined that the parts of Bosch “Common Rail” CRDi fuel system with CP4.1 single plunger pis-ton fuel pump of high pressure are subjected to the following wear types: cavitation, adhesion, corrosion-mechanical and abrasive wear. 
 A wear correlation of a plunger, a plunger tap-pet, a high-pressure fuel pump casing, and fuel nozzle valves is shown. 
 Main defects of friction pair parts caused by fuel system airing are revealed. 
 There are developed recommendations to avoid airing Bosch “Common Rail” fuel system of the fourth generation.

Information Organization in the Airline Cockpit

We describe the all-engine-out landing of Air Transat Flight 236 in the Azores Islands (August 24, 2001) and use certain aspects of that accident to motivate a conceptual framework for the organization and display of information in complex human-interactive systems. Four hours into the flight, the aircraft experienced unusual oil indications. Two hours later, a fuel system failure led to a full-blown emergency that was not evident to the crew until it was too late. Although all relevant data to avoid the emergency were available to the aircraft computer systems, the design choices made about what to display and how to display it kept the pilots “in the dark.” The framework proposed here consists of six levels, beginning from the extraction of data from physical signals, abstracting from raw data to form visual representations on the user interface, and finally integrating high-level elements and information structures. We illustrate how the framework can be used to analyze some of the shortcomings in current display design, and we discuss some principles of information organization and formal analysis of task logic that might help to improve design. Finally, we sketch a design for a helicopter engine display based on these principles.