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    Wyświetlanie 1-11 z 11
    Tytuł:
    Calibration of micro-simulation model in assessment of passenger car exhaust emission during acceleration
    Autorzy:
    Nowak, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2097650.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    exhaust emission
    simulation
    vehicle acceleration
    model calibration
    acceleration dynamics
    emisja spalin
    symulacja
    przyspieszenie pojazdu
    kalibracja modelu
    dynamika przyspieszenia
    Opis:
    In terms of simulation research, it is important to simulate real conditions as precisely as possible. This type of approach makes it possible to minimize the error in the obtained results. The dynamics of acceleration is one of the most important factors having a direct impact on fuel consumption and exhaust emissions from vehicles. The work was carried out with the use of PTV Vissim microscopic vehicle motion simulation software. The considerations were carried out on theoretical acceleration profiles with different dynamics values and the actual character of acceleration, recorded during road tests. The simulations were carried out for a car powered by spark-ignition and compression-ignition engines. The research showed that the calibration of the acceleration character of the vehicle in simulation tests may result in significant differences in obtained results of exhaust emissions.
    Źródło:
    Combustion Engines; 2022, 61, 2; 54--59
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationships between Common Rail accumulator pressure and vehicle traction properties
    Relacje między ciśnieniem w zasobniku common raila a wlaściwościami trakcyjnymi pojazdu
    Autorzy:
    Golebiewski, W.
    Stoeck, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/792112.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    vehicle traction property
    engine test
    engine torque
    effective power
    Common Rail accumulator pressure
    vehicle acceleration process
    operating parameter
    linear velocity
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 1
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of energy efficiency and dynamics during car acceleration
    Autorzy:
    Graba, Mariusz
    Bieniek, Andrzej
    Prażnowski, Krzysztof
    Hennek, Krystian
    Mamala, Jarosław
    Burdzik, Rafał
    Śmieja, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/24200840.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    acceleration
    fuel consumption
    energy consumption
    vehicle dynamics
    acceleration dynamic index
    Opis:
    In this work, the authors focused on analyzing the energy efficiency and dynamics during car acceleration, featuring investigation of acceleration dynamics under various acceleration intensities. The tests were performed in the speed range between 45 km/h and 120 km/h, at a constant gear ratio. This enabled obtaining variable dynamic parameters of the acceleration process, ranging from about 0.1 to 1.4 m/s2, and recording variation in fuel consumption from 6.28 to 27.03 dm3/100km. The study focused on determining the relation between fuel consumption, energy efficiency and vehicle acceleration depending on the available drivetrain power. The relation between fuel consumption and vehicle acceleration was described by using the dynamic index. The proposed dynamic index takes into account the energy (from burned fuel) and vehicle acceleration intensity to obtain an objective metric for characterizing the acceleration process. The aforementioned index takes the form of the passenger car movement energy quality index and can be related to widely known physical properties, thus ensuring its universality. The index expresses the energy expenditure within the time needed to accelerate a vehicle weighing 1kg by a 1m distance. As opposed to other criteria that are applied to the assessment of passenger cars dynamics, the index shows a high determination coefficient R2 in excess of 0.99, and can be used as a universal metric to test other vehicle types.
    Źródło:
    Eksploatacja i Niezawodność; 2023, 25, 1; art. no. 17
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory tests of a car seat suspension system equipped with an electrically controlled damper
    Autorzy:
    Zuska, Andrzej
    Więckowski, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/135597.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    acceleration
    passive safety
    road safety
    vehicle safety
    vibrational comfort
    vibrations
    Opis:
    The paper presents the results of laboratory simulation tests of a suspension system for a car seat. The first part of the paper contains a description of the experiment, paying particular attention to the conditions in which the tests were conducted and the properties of the electrically controlled damper, which was mounted in the tested car seat’s suspension. Graphs of the damper’s operation were determined for different values of current intensity and the signal controlling the damper’s damping ratio and then the damping characteristics were determined on this basis. Simulated tests of the car seat’s suspension were carried out on a car component test station. During the tests, the values measured were the acceleration recorded at selected points on the dummy, which was placed on a seat equipped with suspension using a magnetorheological (MR) damper during the experiment. The second part of the paper presents an analysis of the results of the experimental tests with particular emphasis on the influence of the current that controls the operation of the damper on the values of the RMS index of the acceleration at selected points of the dummy.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 60 (132); 192-199
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of vehicle stability on road curves in winter conditions
    Autorzy:
    Kemzuraite, K.
    Pukalskas, S.
    Bureika, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/247233.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    vehicle stability
    vehicle dynamics
    road curve
    road surface adhesion coefficient
    lateral acceleration
    road traffic safety
    Opis:
    The paper reveals peculiarities of a vehicle movement/operation on road curves when the road surface is slippery and/or snowy, with asphalt ruts. The survey of scientific works related to the lateral acceleration and movement dynamics of a vehicle is presented. Field experiments with different vehicles were carried out in winter conditions. The acceleration value and stability parameters depending on the speed of a vehicle and adhesion coefficient on road curves are analysed. Dependence of the vehicle lateral acceleration on road curves with various adhesion surfaces are given in graphical charts. Recommendations how to improve road safety by limitation of the speed in winter conditions are formulated. Finally, basic conclusions are given. Handling the vehicle on the road with the compressed snow surface (on the curve of the radius of 120 m) is much more dangerous when the adhesion coefficient of the wheels and the road is low if compared to handling the vehicle along the dry ruts at the same speed. When the vehicle moves along the curve of 120 m radius at a speed of 70 km/h, and the road surface is snowy, the lateral acceleration of 3.1 m/s2 is reached. The paper indicates that lateral acceleration of 3.1 m/s2 can be reached while moving along the snowy road with dry ruts at a speed higher in 27% (90 km/h). For improving the vehicle safety, it is recommended to have road signs on sharp turns/curves (R less than 120 m) to decrease the vehicle speed in 20 km/h.
    Źródło:
    Journal of KONES; 2011, 18, 4; 191-197
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis of the influence of lateral suspension parameters on the ride quality of railway vehicles
    Autorzy:
    Dumitriu, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/280158.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    railway vehicle
    ride quality
    lateral suspension
    vibration behaviour
    R.M.S. acceleration
    Opis:
    This paper deals with the influence of parameters of the lateral suspension on the ride quality of railway vehicles during running on a track with lateral deviations, compared to the designing geometry. The ride quality is evaluated at speed 200 km/h, based on lateral accelerations in three reference points of the vehicle carbody. The values corresponding to these accelerations are derived from numerical simulations on a non-linear model of the vehicle with 21 degrees of freedom. The results thus obtained validate a series of features in vibrational behaviour of the railway vehicle and the possibility to improve the ride quality by the best possible selection of the suspension parameters.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1231-1243
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of mobile vehicle skid in traction movement mode
    Modeljuvannja procesy zanosy mobilnih masin v tjagovomu rezimi ruhu
    Autorzy:
    Klets, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/76622.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    mobile vehicle
    skid
    stability
    traction movement
    nonlinear model
    drift
    acceleration
    mathematical model
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 7
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power steering adjustment considering lateral acceleration influence
    Kształtowanie charakterystyk wspomagania układu kierowniczego przy wykorzystaniu przyśpieszenia poprzecznego pojazdu
    Autorzy:
    Grzegożek, W.
    Nogowczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/263369.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    pojazd samochodowy
    przyspieszenie poprzeczne
    układ kierowniczy
    wspomaganie
    lateral acceleration
    motor vehicle
    steering system
    support
    Opis:
    The paper presents an idea of power steering modification. The idea aims at providing the driver with favourable road feel which is considered to be essential during a driving process. The authors of the paper point out that lateral acceleration should be included in power steering regulation algorithm in order to adjust its characteristics. Lateral acceleration can be included by application of the parameter called steering effort which is closely connected to that value. Experimental and theoretical research of dynamic characteristics of steering systems was carried out. An opportunity of steering effort application to power steering algorithm was studied on the basis of the results obtained. The most important results are presented and discussed in the paper.
    W pracy została przestawiona pewna koncepcja modyfikacji wspomagania układu kierowniczego. Ma ona na celu zapewnienie kierowcy korzystnego odczucia kierowania, które jest bardzo istotne podczas kierowania pojazdem. Autorzy pracy wykazują, że przyśpieszenie poprzeczne powinno zostać uwzględnione w algorytmie sterowania regulacją wspomagania układu kierowniczego w celu poprawienia charakterystyki tego układu. Uwzględnienie przyśpieszenia poprzecznego w regulacji wspomagania układu kierowniczego byłoby zrealizowane przez zastosowanie wielkości ściśle z nim związanej, zwanej wysiłkiem kierowania. Zostały przeprowadzone badania eksperymentalne i teoretyczne układów kierowniczych. Na podstawie otrzymanych wyników sprawdzono możliwość zastosowania wysiłku kierowania do regulacji wspomagania układu kierowniczego. Najważniejsze wyniki zostały zaprezentowane i omówione w pracy.
    Źródło:
    Archiwum Motoryzacji; 2010, 2; 127-144
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of energy consumption in the acceleration process of a passenger car
    Autorzy:
    Mamala, Jarosław
    Graba, Mariusz
    Bieniek, Andrzej
    Prażnowski, Krzysztof
    Hennek, Krystian
    Kołodziej, Szymon
    Mazurek, Bartosz
    Sproch, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/2097656.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    acceleration
    energy consumption
    vehicle dynamic
    dynamic index
    przyspieszenie
    zużycie energii
    dynamika pojazdu
    wskaźnik dynamiki
    Opis:
    The analysis of the vehicle acceleration process is a current topic based on the aspects related to the general characteristics of the car, its parameters, design, drive unit performance, and the influence of external factors. However, the ability to accelerate is essential from the point of view of the active safety of the car. Often the dynamic parameters are determined on the basis of the car acceleration test carried out on a level road with good surface in terms of the acceleration time is not reliable and the credibility of such results depends on many factors. Therefore in the article, the authors assessed the dynamic and energy parameters of the car motion, in which the intensity of acceleration of the car with different intensities was examined. The acceleration intensity test was carried out from the set initial speed of the car of 45 km/h to the final speed of 120 km/h at a constant gear ratio, and the set intensity of the acceleration process resulted from the constant throttle with a constant deflection of the accelerator pedal. Acceleration was carried out in two variants, the first for a normal internal combustion engine and the second for the same engine but additionally equipped with a short-term boost system. In this way, it influences the increase in power and energy in the car drive system, changing its acceleration intensity. Variable car acceleration intensity was obtained in the range from 0.12 to 1.37 m/s2, and energy consumption at the level of 0.4 to 1.2 MJ in the distance of 1/4 mile. The article proposes a combination of energy parameters and engine power in order to assess the acceleration dynamics, for this purpose, the specific energy consumption of the car was determined, ranging from 0.35 to 2.0 J/(kg∙m), which was related to the engine power, denoting it with the dynamics index. The study focuses on the assessment of the relationship between the specific energy consumption and acceleration of passenger cars in the available powertrain system using a new dynamics index. The proposed dynamics index combines the energy and dynamic parameters of the car to be able to objectively quantify the acceleration process.
    Źródło:
    Combustion Engines; 2022, 61, 3; 35--44
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods for determining the take-off speed of launchers for unmanned aerial vehicles
    Autorzy:
    Jastrzębski, G.
    Ułanowicz, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/243050.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    aviation
    unmanned aerial vehicle
    take-off launcher
    take-off speed
    acceleration recorder
    lotnictwo
    bezzałogowy statek powietrzny
    prędkość startu
    rejestrator przyspieszenia
    Opis:
    Unmanned aerial vehicles (UAV) are currently a very rapidly developing type of aviation. The problem of support during the take-off with the use of, i.e. take-off launchers arose along with their development, especially for UAVs with weights and dimensions preventing manual take-off. One of the major issues associated with UAV take-off launchers is for its UAV accelerating element to obtain its initial speed. The article presents three methods of determining launcher take-off speeds for unmanned aerial vehicles, i.e. the concentrated very oblique projection method, the high-speed camera methods, and the acceleration recorder method. The take-off launcher carriage speed in the oblique projection method is determined from a formula. This method involves “ejections” of concentrated masses from the UAV mass range and measuring the component values resulting from the used formula, which contains the range of the oblique projection, the elevation of the projection and its angle. The method using the high-speed camera involves recording the course of ejections of the concentrated mass from the launcher. The average take-off speed is determined on the basis of a take-off run length (section of the launcher race, where the unit accelerates) and defining the start and end frame of the carriage movement. The third method for the determination of the take-off speed utilizes an acceleration recorder. The method with the recorder involves registering a change in the accelerations when the take-off carriage is being accelerated by a system fixed on the carriage or the accelerated object. The article presents the methodology of dynamic tests of object acceleration on a launcher, necessary for the determination of speed with the mentioned methods. Selected results from actual tests with the use of the 01/WS/2015 launcher, which is an element of the ZOCP JET2 set, were presented. The test results are presented in a tabular form. The methods for the determination of the take-off speed were compared on the basis of performed tests. Based on the obtained results, the factors impacting the accuracy of each of the methods were identified.
    Źródło:
    Journal of KONES; 2018, 25, 1; 170-176
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical synthesis of the track alignment and applications. Part II : The simulation of the dynamic behaviour in the railway vehicles
    Numeryczna synteza nierówności toru oraz aplikacje. Część II: Symulacja zachowania dynamicznego pojazdów kolejowych
    Autorzy:
    Dumitriu, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/374319.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    dopasowanie toru
    model pojazdu
    przyspieszenie poprzeczne
    dynamika wagonu kolejowego
    track alignment
    vehicle model
    lateral acceleration
    railway dynamics
    lateral dynamic behaviour
    Opis:
    This paper features a method of synthesizing the track irregularities by which the alignment may be analytically represented by a pseudo-stochastic function, as well as the implementation of such a method in the numerical simulation of the dynamic behaviour of the railway vehicles. The method described in Part I relies on the power spectral density of the track irregularities, as per ORE B 176 and the specifications included in UIC 518 Leaflet regarding the track’s geometric quality. Part II shows the results of the numerical simulations regarding the lateral behaviour of the railway vehicle during the circulation on a tangent track with lateral irregularities, synthesized as in the method herein. These results point out many basic properties of the lateral vibration behaviour of the railway vehicle, a fact that demonstrates the efficiency of the suggested method.
    L’article présente une méthode pour la synthèsedes irrégularités de la voie, avec laquelle le dressage peut être représenté analytiquement par une fonction pseudoaléatoire et aussi l’application de cette méthode dans la simulation numérique du comportement dynamique latérale des véhicules ferroviaires. La méthode proposée, décrite dans la Partie I de l’article, este basée sur la densité spectrale de puissance desirrégularités de la voie décrite selon ORE B176 et les spécifications contenues dans la Fiche UIC 518concernant la qualité géométrique de la voie. La PartieII présente les résultats des simulations numériques dule comportement dynamique latéral du véhicule pendant la circulation sur une voie en alignement avec des irrégularités latérales synthétisées en utilisant la méthode présentée. Il met en évidence un certain nombre de propriétés de base du régime de vibrations latérales du véhicule ferroviaires, ce qui démontre l’efficacité de la méthode présentée.
    Źródło:
    Transport Problems; 2016, 11, 2; 5-16
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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