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15th International AIVELA Conference on Vibration Measurements by Laser and Noncontact Techniques, AIVELA 2023

作者： Goszczak, J. Mitukiewicz, G. Batory, D. Department of Vehicles and Fundamentals of Machine Design Faculty of Mechanical Engineering Lodz University of Technology Zeromskiego 116 street Lodz Poland

Laser Doppler Vibrometry (LDV) is a still inexhaustible source of research knowledge. Continuous development of the hardware and software makes it possible to employ this technique to new applications. Among plenty of LDV research ideas, the analysis of the influence of material's surface modification on the structure's dynamics is not widely investigated. The aim of the paper is to verify a research hypothesis, which assumes that by applying a thin layer of material (coating) to an existing structure or by physical modification of structure's surface, it is possible to measurably change the dynamics features of the analysed structure in terms of values of natural frequencies and oscillations amplitudes. To perform the assumed research and measurement of vibration a doppler laser vibrometer Polytec PSV-500 was used. Measurement outcomes for different titanium alloy plates surface modifications are depicted. In article's summary research-based conclusions are formulated. © Published under licence by IOP Publishing Ltd.

关键词： Titanium alloys

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Safety issues for electric and hybrid vehicles 12

Safety issues for electric and hybrid vehicles

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12th International Science-Technical Conference AUTOMOTIVE SAFETY, AUTOMOTIVE SAFETY 2020

作者： Zakrzewicz, Wojciech Sys, Ewa Mrowicki, Adam Siczek, Krzysztof Kubiak, Przemyslaw Warsaw University of Technology Department of Automobile and Heavy Machines Warsaw Poland Institute of Machine Design and Operation Wroclaw University of Technology Wroclaw Poland Lodz University of Technology Department of Vehicles and Fundamentals of Machine Design Lodz Poland

ISBN: (纸本)9781728158129

Currently, hybrid and electric vehicles have an increasing share in the number of road vehicles. The objectives of introducing such vehicles include reducing the negative impact on the environment as well as reducing their running costs. With the development of these vehicles, new risks arise. This paper presents key problems related to the development of hybrid and electric vehicles, issues that are unknown to conventional vehicles with internal combustion engines. The article focuses on identifying these risks and hazards that occur when a hybrid or electric vehicle is in use, but also when such a vehicle is not in use. Potential risks for emergency personnel in the event of an accident with such vehicles have also been identified. The article also deals with possible harmful events that may occur after or due to incorrect vehicle repairs. The problems of low sound volume of hybrids and electrical vehicles, as well as electric scooters left unmarked in the road were emphasized. © 2020 IEEE.

关键词： Hybrid vehicles

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Investigation of tribological properties of lithium grease with SiO2 nanoparticles

Investigation of tribological properties of lithium grease w...

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International Conference on Green Engineering Technology and Applied Computing 2019, IConGETech2 019 and International Conference on Applied Computing 2019, ICAC 2019

作者： Rylski, Adam Siczek, Krzysztof Lodz University of Technology Institute of Materials Science and Engineering Stefanowskiego Str. 1/15 Lodz90-357 Poland Lodz University of Technology Department of Vehicles and Fundamentals of Machine Design Stefanowskiego Str. 1/15 Lodz90-357 Poland

The aim of the work was to investigate the effect of the SiO2 nanoparticles concentration in the lithium grease and of contact pressure on the spinning friction coefficient in the contact zone between a steel plate and a ball. The invvestigations were carried out using the a tribotester for the spinning friction torque in the contact between the ball and the plate. Ball rotated relative to the plate axis at a constant speed and was loaded by the a force increasing in a stepwise manner for the consecutive series. The contact zone was lubricated with a pure lithium grease - pure or with the grease with suspended SiO2 nanoparticles. The friction coefficient decreased with the increase of contact pressure for the pure lithium grease. For the concentration = 6wt.% of SiO2 nanoparticles in the grease friction coefficient decreased and for the other concentrations it increased with the increase of the contact pressure. If the values of average contact pressure were below 550 MPa, the friction coefficient values for pure lithium grease were higher than those for lithium grease with suspended SiO2 nanoparticles. For higher values of the contact pressure, the values of the friction coefficient for the pure lithium grease could be lower, equal or higher than those for lithium grease containing SiO2 nanoparticles depending on the value of SiO2 the concentration. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Friction

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Influence of the seal types on the piston movement resistance in hydraulic cylinder

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AIP Conference Proceedings 2022年第1期2557卷

作者： J. Goszczak Z. Dimitrova G. Mitukiewicz R. Pietruszewski D. Batory 1Lodz University of Technology Department of Vehicles and Fundamentals of Machine Design Zeromskiego Street 116 Lodz 90-924 Poland 2PSA Groupe Centre Technique de Velizy Route de Gisy Parc Innovel Sud 78943 Velizy-Villacoublay Cedex France

This paper presents a study about an effort which was made to diminish the movement resistance of piston in serial hydraulic actuator. Most of hydraulic actuators are designed for operating at high pressure conditions. This means that the applied sealing has to be sufficiently robust to overcome the serious difference of pressures on piston's sides. This is associated with drawbacks like high movement resistance, significant hysteresis and stick-slip phenomenon. The article investigates the movement resistance of actuator's piston. An original measurement methodology is presented. Initially, the values of movement resistance for serial design were measured and then, the same procedure was applied for various proposed solutions. The goal of every trail was to diminish the movement resistance of the piston with the simultaneous negligible value of leakage through the sealing. The attainment of such solution, makes it possible to reduce the energy consumption during the piston movement and the hysteresis of movement. Those figures are especially important when the actuator is used for changing the position of other parts, rather than the source of immense power. One of these applications takes place in the Continuously Variable Transmissions (CVT). As the result of the investigation indicates, it turned out that the implementation of two sealings like piston rings is the best solution. This design guarantees the negligible value of leakages with simultaneous movement resistance reduction by over 65% comparing to the original design.

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Precision method of velocity determination based on measurements of car body deformation - Non-linear method for intermediate vehicle class

Precision method of velocity determination based on measurem...

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2018 World Congress on Engineering, WCE 2018

作者： Kubiak, Przemyslaw Wozniak, Marek Siczek, Krzysztof Karpushkin, Viktor Nikulenkov, Oleg Krzemieniewski, Adam Mierzejewska, Paula Golebiowski, Wlodzimierz Senko, Jaroslaw Szosland, Andrzej Department of Vehicles and Fundamentals of Machine Design Lodz University of Technology Poland Wise Novgorod State University Veliky Sankt-Peterburgskaya Russia Institute of Vehicles Warsaw University of Technology Poland

ISBN: (纸本)9789881404893

In the research concerning Intermediate NHTSA vehicle class [16] there was presented the application of non-linear description of the bk coefficient depending on the precrash velocity Vt as a function of generalised body deformation coefficient Cs defined after crash test. The nonlinear relationship includes one independent parameter - vehicle mass. These two parameters - Cs and m- through the surface of the second order describe the value of the crash velocity Vt. Previously used linear model [13, 15, 17] did not allow to achieve the accuracy of velocity determination in the range enabling performing the crash reconstruction based on such model. The non-linear model is more precise. The value of the relative error Vt decreases, what authors present on the plots of the error value as a function of the case number in the database. © 2018 Newswood Limited. . All rights reserved.

关键词： Deformation

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Correction to: Steam reforming of ethanol for hydrogen production: influence of catalyst composition (Ni/Al2O3, Ni/Al2O3–CeO2, Ni/Al2O3–ZnO) and process conditions

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Reaction Kinetics, Mechanisms and Catalysis 2021年第2期134卷 1089-1089页

作者： Shtyka, O. Dimitrova, Z. Ciesielski, R. Kedziora, A. Mitukiewicz, G. Leyko, J. Maniukiewicz, W. Czylkowska, A. Maniecki, T. Institute of General and Ecological Chemistry Lodz University of Technology Lodz Poland PSA Groupe Centre Technique de Velizy Route de Gisy Velizy‑Villacoublay Cedex France Department of Vehicles and Fundamentals of Machine Design Lodz University of Technology Lodz Poland

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Control system design for volumetric concrete mixer using a microcontroller

Control system design for volumetric concrete mixer using a ...

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2017 World Congress on Engineering, WCE 2017

作者： Gustavo, Ozuna Marek, Wozniak Leonel, Gomez Marcos, Lugo Coporo Przemyslaw, Kubiak Paula, Mierzejewska Michal, Szymanski Pawel, Pluciennik Wlodzimierz, Golebiowski Andrzej, Szosland Department of Vehicles Lodz University of Technology Poland Department of Vehicles and Fundamentals of Machine Design Lodz University of Technology Poland Department of Industrial Engineering and Systems University of Sonora Mexico

The following article shows the steps for developing a control system for a mobile volumetric concrete mixer, in which you can control the strength of the material, with the modification of the quantities of each aggr... 详细信息

ISBN: (纸本)9789881404831

关键词： Microcontrollers

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Investigation of tribological properties of lithium grease with SiO2 nanoparticles

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IOP Conference Series: Materials Science and Engineering 2019年第1期551卷

作者： Adam Rylski Krzysztof Siczek Lodz University of Technology Institute of Materials Science and Engineering 90-357 Lodz Stefanowskiego Str. 1/15 Poland Lodz University of Technology Department of Vehicles and Fundamentals of Machine Design 90-357 Lodz Stefanowskiego Str. 1/15 Poland

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Model of a permanent magnet motor with an inverter in the drive system of the vehicle.

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IOP Conference Series: Materials Science and Engineering 2018年第2期421卷

作者： Zbigniew Pawelski Grzegorz Uszpolewicz Zbigniew Zdziennicki Lodz University of Technology Department of Vehicles and Fundamentals of Machine Design Stefanowskiego 1/15 90-537 Lodz Poland

The paper presents a mathematical model of a permanent magnet motor, powered by a three-phase source of sinusoidal voltage and a control method. The cooperation of the numerical integration algorithms of the system of differential equations of the motor and inverter has been verified. The results of numerical simulations are presented in graphic form. The work is a supplement to the publication [1], which proposed a model: a battery, a supercapacitor and a method of controlling these energy sources during the driving cycle of the vehicle.

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Define of wear degree of selected car suspension elements 36th

Define of wear degree of selected car suspension elements

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36th FISITA World Automotive Congress, 2016

作者： Marek, Wozniak Przemyslaw, Kubiak Pluciennik, Pawel Piotr, Slowik Karol, Pijanowski Krzysztof, Siczek Gustavo, Ozuna Lodz University of Technology Department of Vehicles Fundamentals of Machine Design Poland Department of Industrial Engineering and Systems University of Sonora Mexico

The following paper describes research of exploited elements of vehicle suspension – the ball joints. The wear degree of the selected pins was compared in terms of mileage of the vehicle, period of the exploitation and the car model. This investigation aimed at determination of the roughness profiles for new and exploited elements. Test bench research was performed using a scanning tunneling microscope (direct current mode, needles made of Pt-Ir wire (10% iridium, 90% platinum) 0,25 mm in diameter cut with sharp blades) and AFM. The exploitation of the pins visible on the STM microscope enabled determination of the exploitation and Ra parameter profiles as a function of number of cycles and load. Basing on it, it was possible to estimate the mileage and the time after which it was necessary to perform a verification or a replacement of a particular element. © 2016, FISITA. All rights reserved.

关键词： Microscopes

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