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Wyszukujesz frazę "Condition analysis" wg kryterium: Wszystkie pola


Wyświetlanie 1-6 z 6
Tytuł:
Possibilities of analysis of condition and repair of common-rail system injectors
Autorzy:
Karpiuk, W.
Bor, M.
Smolec, R.
Powiązania:
https://bibliotekanauki.pl/articles/241530.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
common-rail
diagnostics
testing tables
injectors
Opis:
A wide use of common-rail injection systems in vehicles made it necessary to develop effective methods of diagnosing and repair of their subassemblies. The paper presents problems connected with diagnosing of malfunctions and regeneration of common-rail system injectors with the use of testing tables. Due to precise workmanship and strong forces, the systems are particularly exposed to damage most often caused by the application of fuels of inadequate quality. Early detection of damage symptoms may contribute to considerable decrease of costs of repair without entailing any failures of other components of the system. The authors discuss the most common methods of evaluation of the condition allowing a quick and explicit identification, whether a given injector has been damaged or not. Further deliberations lead to the determination of possible regeneration of individual generation systems of various manufacturers. The authors also present basic activities of the regeneration process and tests made with the use of testing tables. The work presents results of tests performed on a new injector with the use of testing equipment of various manufacturers. Discussion on obtained results leads to conclusions that, due to little recurrence and insufficient accuracy of measurements, possibilities of clear evaluation of technical condition of injectors is greatly limited.
Źródło:
Journal of KONES; 2016, 23, 4; 209-216
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibility of obtaining diagnostic information about the ships engine fuel injection system condition based on the analysis of characteristics of heat release
Autorzy:
Witkowski, Kazimierz
Powiązania:
https://bibliotekanauki.pl/articles/248068.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
marine diesel engine
indicated parameters
indicator diagram
heat release characteristics
injection system
diagnostic
Opis:
Marine engines are very complex technical objects, having many important functional systems, which include, inter alia, injection system, characterized by high unreliability. In this system, there may be different types of defects (damage) that affect the engine parameters, including specific fuel consumption, as well as failures endanger the safety of the ship. The indicator diagrams and analysis of indicated parameters have limited utility in the diagnosis of damages of marine engine, although this is a method commonly used in operational practice. To achieve greater diagnostic effectiveness, when, based on indicator diagrams, are calculated and then the characteristics of heat release is analysed - net of heat release characteristics and the intensity of the heat release, it was demonstrated. This procedure is particularly effective in the diagnosis of damages of marine diesel engine injection system components. It has been shown that the characteristics of heat release contain information about the condition of the injection systems, which enable to diagnose their failures. This is shown on the example of a clogged nozzle holes (their carbonizations). The obtained results allowed selecting the diagnosis symptoms, useful in detecting these faults in the injection system, from the characteristics of heat release: net heat release (Q) and intensity of heat release (q). The object of the research was typical marine medium speed engine Sulzer A25/30.
Źródło:
Journal of KONES; 2019, 26, 3; 249-256
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aviation piston engines : flight parameter analysis
Autorzy:
Boguszewicz, P.
Glowacki, P.
Powiązania:
https://bibliotekanauki.pl/articles/245160.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aviation piston engine
on-condition maintenance
engine flight parameter
Opis:
A program and tools enabling general aviation operators in our country the exploitation of the piston engines oncondition has been developed in the Institute of Aviation. Apart from the existing and strictly supervised engine manuals tasks, the program introduces, among other things, new maintenance mandatory activities like engine parameter monitoring during cruise and climb and a way of assignation diagnostic tolerance limits for them. That has never been performed in the aviation piston engines maintenance practice. In order to improve such analysis a flight data recorder (FDR) EDM 900 has been installed on the DA20- C1 „Katana” aircraft equipped with IO-240-B engine, which will allow elimination of the pilot's read errors and examination of the changes in the parameters during the entire flight. This will enable estimating if at a certain time of the flight a specified engine parameter is not exceeding the permissible values. Parameters from cruise have to be recorded in the similar range of the engine rpm’s. The parameters are oil pressure, oil temperature, cylinder head temperature, EGT, fuel flow, outside air temperature, rpm and altitude. Lower and upper acceptable limit values should be set, in which they can be contained throughout engine life. Engineers should also observe the trend of their changes. This article shows results of the aviation piston engine parameters analysis taken from FDR for ground runs, take-offs and cruise flight phases.
Źródło:
Journal of KONES; 2016, 23, 3; 41-48
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The computer - aided analysis of images to assess condition of gas turbine blades
Autorzy:
Pawlak, W.
Błachnio, J.
Powiązania:
https://bibliotekanauki.pl/articles/243376.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gas turbine
blades
discoloration
deterioration of microstructure
Opis:
In order to guarantee reliable and safe operation of avionic turbo engine their components and subassemblies are subjected to regular inspections and maintenance. The most frequent reasons for failures of the engines include overheating of materials, thermal fatigue of blades and vanes in the jet subassembly as well as the gas turbine rotor. Failures of that type lead to faulty operation of the engine and sometimes to accidents with disastrous consequences. The decision to have the engine repaired is taken by maintenance personnel that chiefly employ the method of visual inspection with use of a videoscope. However, such examination of turbine components is burdened by a subjective approach. To improve reliability and trustworthiness of the examinations results it is necessary to enable objective and unbiased evaluation of examination results. This paper outlines a non-destructive method that is suitable for evaluation of condition demonstrated by gas turbine blades and is based on digital processing of images acquired from the blade surface in visible light. To enable high clearness of these images the particular attention is paid to the problem of how to provide optimum conditions for investigations and mitigate geometrical distortions of images acquired from maintenance operations. The paper demonstrates that there are relationships between operation lifetime of blades and discoloration of their surfaces due to overheating of the blade material. These relationships are revealed by digital analysis of images acquired for the blade surfaces and expressed as statistical parameter of the first and second order. To improve unambiguity of the analysis results a low-pass filter was applied. It was demonstrated that these relationships are suitable for evaluation how much the status of the blade material microstructure is altered. Results from this study enable formulation of the conclusion that diagnostics of gas turbine blades through computer-aided analysis of images acquired from the blade surfaces may even be possible under field conditions with no downtime of the equipment under tests.
Źródło:
Journal of KONES; 2013, 20, 3; 299-306
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the procedure of evaluation of the technical condition of a high-pressure common rail fuel pump using a test bed
Autorzy:
Bor, M.
Idzior, M.
Karpiuk, W.
Smolec, R.
Powiązania:
https://bibliotekanauki.pl/articles/243763.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
common rail
test bench
diagnostic
Opis:
Piston displacement pumps use in common rail fuel injection systems generates very high pressure, reaching even 300 MPa. Maintaining such a high pressure is possible thanks to very precise machining resulting in as little clearance between the piston-cylinder assemblies. Due to very high forces operating in the systems and relatively unfavourable lubrication conditions resulting from using fuel as lubricants, the pumps are subject to wear and consequently lose their operating parameters. The high cost of production of the pumps, resulting from their technological advancement, forced their manufacturers to introduce technologies for diagnosing and regenerating them. The diagnostics consists in removing the pump from the engine and having it verified using a test bed. The first stage consists of evaluating the pump’s flow at null pressure; follow by evaluation of its maximal delivery for the pressure of 100 MPa. The obtained values are compared to the values achieved by a new pump. The effect of negative evaluation on a test bed is the disassembly of the pump, verification of the condition of its parts and replacement of the damaged elements. The authors examined new and used pumps on a tested, aiming to determine the characteristics of delivery of a pump for various pressures. The objective of the research was to identify the actual points in the pump’s operation at which the delivery drops the most due to the wear. The highest difference in delivery was found to exist for the maximal compression pressure. The obtained results were analysed and the possibility of changing the pump diagnostics procedure with the use of a test bed was determined.
Źródło:
Journal of KONES; 2018, 25, 3; 65-70
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the use of OBD II / EOBD congestion diagnostics in the light of vehicles operation and their technical condition
Autorzy:
Szokało, A. A.
Rychter, M.
Powiązania:
https://bibliotekanauki.pl/articles/242594.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
on-board diagnostics
diagnostic procedures
OBD
OBD II
EOBD
reliability of engines
operation of engines
Opis:
Transport in human life has played a key role since ancient times. At the turn of years it has evolved, initially using only the power of human legs, then the animals until use internal combustion engines. The first internal combustion engine was presented by Brackenburow in 1836. The construction showed a very desirable type of combustion engine – burning a mixture of hydrogen and oxygen and expelling clean water as exhaust gas. However, the invention was abandoned due to its innovativeness and lack of trust in it. The topic was again taken in 1860 presenting a two-stroke engine using a mixture of natural gas and air with spark ignition. Striving for even greater perfection, Rudolf Diesel in 1893 presented and patented the first self-ignition diesel engine. The first solution, although used today, has shown that automotive engines leave a significant margin of reliability. The operational reliability of internal combustion engines is important in relation to the conditions of their operation and technical condition. The impact of toxic substances in exhaust gases and their impact on the natural environment these days is an important issue. One of the forms of work on the problem is the current diagnosis of engine operation. This was possible thanks to the use of the OBD I system, which was later transformed into OBD II / EOBD and the result of the test results obtained to the applicable EURO standards. The system allows testing during a road test in normal car operation. Using the OBD recorder, the operation of an example vehicle will be analysed in various operating conditions, and the obtained results will provide diagnostic possibilities.
Źródło:
Journal of KONES; 2018, 25, 2; 371-378
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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