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Wyświetlanie 1-12 z 12
Tytuł:
Vibration isolators test bench
Autorzy:
Pobedin, A.
Kosov, O.
Shekhovtsov, K.
Powiązania:
https://bibliotekanauki.pl/articles/244493.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
vibration isolator
test bench
vehicle cabin
suspension
testing
elastic and damping characteristic
Opis:
The description of the scheme and design of the test bench for testing vibration isolators intended for use in the vehicle's cabin suspension. Test bench construction allows to implement a wide range of loadings on vibration isolator of the vehicle cabin, to investigate the impact of the loading's arm changing and to perform analysis of the vibration isolator’s elastic and damping characteristics changing impact on cushioning quality. Variant of the test bench construction modernization, which can allow applying typical exploitation loads, which include vertical and lateral components, is described. We propose a scheme of forced oscillations excitation system on the test bench by cam-eccentric mechanism. It includes a DC motor with stepless frequency regulation and with cams of different shape on its shaft, which affect the contact surface of the test bench's vertical H-beam of a rocker arm. We also propose a scheme of forced oscillations excitation system on the test bench by inertial exciter. It includes a DC motor with stepless frequency regulation with inertial vibration exciter on its shaft, which consists of a mass, placed eccentrically relative to the shaft axis. There are two variants of the test bench scheme – with the forced oscillations excitation device and without it.
Źródło:
Journal of KONES; 2011, 18, 1; 457-462
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of can in automation test bench to test the engine cooling system
Autorzy:
Kneba, Z.
Śmieja, M.
Powiązania:
https://bibliotekanauki.pl/articles/243994.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
CAN networks
car networks
data exchange
cooling system
engine operation
Opis:
Can is widely distributed network in the industry and automotive applications with high availability enable its electronic components and the easy integration projects with software engineering research Matlab type, tends to encourage the use of these precious features of CAN to build research stands. The article presents a data transmission system using the CAN protocol as a test of a new generation of cooling systems for internal combustion engines. Adopted for the object of research methodology which involves the simulation of variable parameters of the different control strategies require data processing in real time. A large number of recorded and interpreted online information about the temperatures in many parts of the facility and other variables such as instantaneous fuel consumption, secreted mechanical power, crankshaft and throttle position together with the need to control the plant justify departure from the traditional methods of transmitting signals in separate lines , for the application data exchange network, adopted by the authors as a way of organizing the flow of data based on the CAN protocol using the Matlab Simulink Real Time. The article contains a description of the implementation of networks in the context of very specific features for Controller Area Network particularly regarding mechanisms such as arbitration on the bus, the method of initiation and the provision of sufficient transmission capacity. The presented graphs and diagrams illustrate the proposed and implemented solutions and the results obtained from stucties measuring temperatures for the warm-up and cooling of the engine.
Źródło:
Journal of KONES; 2010, 17, 3; 205-210
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test bench and simulation research on hydrodynamic torque converter for different input signals
Autorzy:
Wozniak, M.
Siczek, K.
Pawelski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/247933.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
torque converter
torque
Matlab/Simulink
linearization
nonlinear model
ARX
OE
Opis:
This paper presents the experimental research and simulating results of a ZM130 hydrodynamic torque converter under steady and unsteady working conditions with an external step signal and sinus on turbine’s shaft on a modified test bench. The mathematical model of torque converter was described by the one-dimensional flow theory with variable loss coefficients. The character of received equations from test bend showed by linearized transmittance functions with variable coefficients. For test bend object identification researches will be used an Identification Toolbox from a mathematical code in Matlab, which enables to create transfer functions as a linear model from measurements data as they got the highest correctness level with input signal (as they get the best correction level with input signal on the pump´s shaft). This mathematical model for dynamic loads will be verified by experimental tests. The aim of the carried out studies was determination the effect of sampling time decreasing on the quality of measured parameters. Results of present investigations were compared with those obtained earlier, but for the same input signals .It is possible to affirm that proposed theoretical model imitates the change of dynamic parameters, and the same the property of the torque converter. Researches led on the test bend with extortion input torque sinus signal on the turbine’s shaft confirmed correctness of this model.
Źródło:
Journal of KONES; 2016, 23, 4; 561-568
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of verification of main transmission gear boxes on test bench using vibration measurement
Autorzy:
Walentynowicz, J.
Trawiński, G.
Wieczorek, M.
Polak, F.
Boruta, G.
Powiązania:
https://bibliotekanauki.pl/articles/247281.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
multi wheeled vehicle
transmission gearbox
vibration measures
test stand
Opis:
The methodology of research and the inspection of the main transmission gearboxes of multi axles armoured vehicle ROSOMAK under operating conditions are described in this article. Tests are carried out on the bench to allow force transmission changes to the extent similar to the loads that occur during vehicle operation. Transmission gear boxes are driven by an internal combustion engine 359 through a reducer (standard engine gearbox). This reducer increase torque and decrease shaft speed similar to condition in the vehicle. On the other side of the transmission, multiplying gearbox coupled with a brake dynamometer were placed. It increases speed according to requirements of the work field of the dynamometer W-230. The combustion engine made possible to measure vibration of transmission gearboxes under the high torque. The torque is greater than obtainable by using electric motors. The value of the inertia moment loading axle shaft was determined using a simplified kinematic diagram. During the tests, vibration were measured at selected points of the housing using different methods of attachment of vibration transducers. First, the screw for assembling the vibration sensor was glued to the hull of gearbox. Second, the sensor was connected with gearbox by permanent magnets. Third, the sensor was used as a hand probe. The results of vibration measured by these methods were compared. Temperature of the gearbox was also measured by using thermocouples and thermovision methods. Selected results are presented and analysed of vibration transmission and its temperature at selected working conditions.
Źródło:
Journal of KONES; 2013, 20, 4; 471-478
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 possibility limiting the time of test injector in diesel engine using factory test bench producers of these elements
Autorzy:
Bąk, Witold
Wojnar, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/245495.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
road transport
simulation
combustion engines
air pollution
environmental protection
Opis:
Regeneration of parts is the most correct form of use of worn out components and contributes, among others, to reduce CO2 emissions. In the case of elements of fuel injector systems, very high precision is required and such regeneration should be carried out using the original parts. It also requires testing on the original testing stands of these manufacturers, which very often characterized by the fact that it is not possible to perform a short test, which means that it is only possible to perform a time-consuming comprehensive test. An unquestionable advantage in some cases would be the possibility of preliminary verification of the correct operation of the regenerated subassembly without the need for a full time-consuming test. In the present situation, only after completing a time-consuming comprehensive test of the diagnosed element of the injection system, it is often necessary to carry out its disassembly, replacement or correction of one of the components and reassembly with the next time-consuming test. In the case of low unemployment in the labour market, this is extremely unfavourable, and it is often not possible to organize work in such a way that the diagnostic test of the subassembly takes place without the participation of an employee. On the basis of the analyses presented in this article, carried out in the research and development department in company whose employee is one of the co-authors, it can be stated that in the current situation on the labour market where skilled workers are required to work and for the development of science is the most purposeful recognition of the possibility of using vibroacoustic signals to shorten time of tests, which with a high probability may end in a negative result. The preliminary analysis carried out, show that limitation of diagnostic time can be over 35%.
Źródło:
Journal of KONES; 2019, 26, 4; 15-20
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The new stand for aging of biocomponents and biofuels process testing at relatively short time
Autorzy:
Dzięgielewski, W.
Kaźmierczak, U.
Kulczycki, A.
Okniński, R.
Stefanowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/949517.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
biofuels
biocomponents
ageing process
test bench
method of measuring
Opis:
In the paper, the concept of a model bench for accelerated ageing of bio-components and biofuels was presented. It is used to simulate the ageing process of biofuels and components of vegetable or animal origin, taking place during storage in the storage tanks. The construction of the bench’s essential elements and its equipment were designed and implemented in such a way as to mostly reflect actual storage conditions in large capacity tanks. An additional and unprecedented function of the bench includes the possibility to simulate the product transport conditions. Furthermore, a method of the test, with the use of simultaneously performed traditional tests on the physical and chemical properties monitored in the process of storage was presented. An analysis of the relation between values of the parameters obtained with different methods (on the model bench and under laboratory conditions) was conducted. In addition, their usefulness to assess the impact of logistic processes on the product quality was presented. In the paper, the results of the work executed within the framework of the project “Development of a prototype of the monitoring system the ageing rate and degree of bio-components and biofuels” within the Program Innovative Economy Operational Programme, Measure 1.4. “Support for goal-oriented projects” were used.
Źródło:
Journal of KONES; 2016, 23, 2; 105-112
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary analysis of vibration signal test results registered at bench test stand of amv rosomak driving axis
Autorzy:
Walentynowicz, J.
Trawiński, G.
Dyga, G.
Polak, F.
Boruta, G.
Powiązania:
https://bibliotekanauki.pl/articles/242851.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
differential axle gears
test bench
vibration of elements
vibration analysis
Opis:
The methodology of measuring the vibration signal recorded on the casing of wheeled armoured vehicle ROSOMAK driving axis is presented. The study was performed on a test bench for different transmission conditions. A preliminary analysis of the frequency spectra vibration signals recorded. The test stand allows investigation of the differential axle gears under load similar to load during duty operation. It was possible by using the combustion engine and gearboxes and load transmission by using the dynamometer break. Have been described. Three methods of attaching acceleration sensors to differential gears: using screws, magnetic washers and probe handle. The results of comparisons of measurement results obtained using these methods. Finally, the sensors was mount by using the screw connections. Selected positions and points of temperature and vibration measures were described. Values of characteristic frequencies of differential axle gears vibration by moving the drive torque through these boxes were calculated. The spectra of the vibration signal determined during testing gearboxes were shown. It was state that of amplitude-frequency vibration spectra of signals recorded at selected points of differential axle gears casing are clearly visible characteristic frequencies but the vibration the bridge gear unit bridges distorted by vibration of the internal combustion engine and gearboxes. In a further stage of research should be included much larger number of the driving axis differentials investigated in various states of well-known technical conditions and should be lead accord to requirements of the active diagnostic experiment.
Źródło:
Journal of KONES; 2013, 20, 3; 419-426
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of diesel fuel mixture and camelina oil ester on the process of fuel injection in traction engine
Autorzy:
Orliński, S.
Orliński, P.
Wojs, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/246900.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuel plant
process of injection
engine test bench diesel engine
Opis:
This paper presents the results of comparative research on basic physical and chemical properties of pure diesel fuel and two types’ mixtures of Camelina oil ester (Camelina oil ester content of the mixture was 10% and 15%) and diesel fuel. Application of these mixtures has different physicochemical properties to power supply diesel engine, made it possible to detect existing differences in the injection process (pumping and spraying). The analysis of the injection process has been defined through experimental graphs of the fuel pressure in injection line and registered height of the needle injector. With the knowledge of these two fast-changing engine parameters and loadvelocity conditions, there were calculated: fuel flow speed from nozzle, range and fuel spray disintegration time and the average critical diameter of the droplets. In the final part of the article it was shown, that the fuel with different physicochemical properties has a significant impact on the injection process. There were also made a comparative assessment of the suitability test compounds for use in service.
Źródło:
Journal of KONES; 2013, 20, 1; 255-261
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
External speed characteristics in engine with multi-stage fuel injection
Autorzy:
Ambrozik, A.
Ambrozik, T.
Kurczyński, D.
Łagowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/245939.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
piston internal combustion engine
characteristics
engine work parameters
test bench investigations
engine fuels
Opis:
Increasingly higher demands pnt on piston internal combustion engines arę aimed at reducing their harmful impact on the natural environment. This refers primarily to nitrogen oxides, particulate matter and noise emissions. The reduction in emissions ofnoxious components oj exhaust gases in engines is achieved by means of, among others, the use of catalysts decreasing nitrogen oxide emissions, particulate matter filters and oxidising catalysts decreasing carbon monoxide and hydrocarbon emissions. Common Rail injection systems make it possible to increase the engine power, and to reduce fuel consumption, exhaust gas toxicity and noise produced by engines. With Common Rail systems, the pattern of fuel injection process can be designed, consequently the combustion process can be controlled. The paper presents the results of test bench investigations into a compression ignition 1.3 Multijet engine with multistage fuel injection, which is manufactured in Poland by Fiat-GM Powertrain Polska Company. The tests were conducted at a stand constructed at the Heat Engines Laboratory ofthe Kielce University of Technology. The scope of investigations included determining economic and energetic parameters of the engine work, and also environmental parameters, such as the concentration of nitrogen oxides NOX, carbon monoxide CO and carbon dioxide CO2 in exhaust gases, and exhaust gas smokiness. In tests, the engine operated under speed conditions and it was fuelled by two commercial diesel oils that had different physical and chemical properties.
Źródło:
Journal of KONES; 2010, 17, 1; 9-16
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of a three disc cycloid gear as a result of bench test
Autorzy:
Pawelski, Z.
Zdziennicki, Z.
Uszpolewicz, G.
Powiązania:
https://bibliotekanauki.pl/articles/243259.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cycloidal gear
efficiency
vibrations
Opis:
The most common design solution are cycloidal gearboxes with two discs, in which the reaction forces of bearings from the working discs create a bending moment on the high-speed input shaft, additionally affecting bearings. In the article are presented the results of tests of the cycloid gear prototype with three discs. Instead of the second disc, the introduction of two side discs, 1800 from the centre disc, allows you to reduce this moment to zero. To compensate for the unbalance of the shaft, the side discs have half the width of the centre disc. Each disc works with its own, separate set of bronze rollers, separated by Teflon washers, which should reduce the friction forces. In the article are presented the results of the tests of the cycloid gear prototype determining basic parameters such as efficiency, torque fluctuations on the input and output shaft, housing vibrations in three directions. FFT analysis of registered parameters showed high compliance of the designated frequencies for different measured signals. The assumed advantages, i.e. high efficiency and low vibration level in the tested range, were confirmed. The results are presented in the form of three-dimensional graphs as functions of speed and torque. High efficiency (80-90) % was obtained for load moments above 150 Nm, which is practically independent of the rotational speed with which the cycloid gearing works. The oil temperature during the tests was maintained in the range of 36oC ± 2oC. The maximal torque of the cycloidal gear was 500 Nm.
Źródło:
Journal of KONES; 2018, 25, 2; 269-280
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test VDA ISO TR3888 on the testing bench for steer by wire system
Autorzy:
Voženilek, R.
Brabec, P.
Maly, M.
Powiązania:
https://bibliotekanauki.pl/articles/246243.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
steer by wire
experimental laboratory establishment
vehicle axle
Opis:
The Technical University of Liberec, Department of Vehicles and Engines, has developed a design of a testing bench which would enable the testing of directional control systems. The objective of the newly designed equipment is to incorporate a real tyre as well as aflexible mounting of the axle components into the tested system. Future of car s will be connected with systems of type steer by wire. This system need to be testing on the testing bench before real test in the car. One method for assessing can be investigation control deviation during test VDA ISO TR3888. The paper will describe measurement of the real car with conventional directional control during test VDA ISO TR3888 and simulation of the system steer by wire on the testing bench. The experimental steer by wire system forms hydraulic circuit with two double-acting hydraulic cylinders with a unilateral piston rod and two proportional valves Parker D1FP. Every wheel front of axle is control alone. The PID regulators were usedfor control of the positioning action. In particular, the testing bench for the testing of steering at zero angular speed of wheels, VDA ISO TR 3888 tests on the testing bench are presented in the paper.
Źródło:
Journal of KONES; 2010, 17, 4; 561-565
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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