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1
Content available Influence analysis of detonations related to output characteristics and to damage level of engine parts in order to eliminate potential risks and ensure reliability of the HCCI technology
Puškár M., Kopas M., Puškár D.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2019
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z. 102
151--163
EN
The engine output characteristic offers very important information during the real application of the HCCI technology. This kind of combustion process significantly influences the wearing degree of the main engine components or even the engine damage. The principle of the HCCI combustion is basically beneficial, however, it can also be destructive. Described in this article are measurements of the engine output characteristics in the case of an experimental piston combustion engine. These measurements were performed by means of a data recording system, whereby the detonation combustion was evaluated using a quantitative method. The real values of atmospheric conditions and fuel mixture composition were added to the measured values. The resulting values were visually compared with a degree of the engine piston damage caused by the detonations. The final result is a limit value, which represents a maximal number of the detonation units that are permissible in order to ensure reliable operation of the HCCI engine.
2
Content available Reliability analysis of crane lifting mechanism
Faltinová E., Mantič M., Kuľka J., Kopas M.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2018
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z. 98
15--26
EN
This paper focuses on a reliability analysis of various structural variants of a crane lifting mechanism. The reliability of such a mechanism is a basic requisite for the safe operation of the crane as a whole. The article analyses and jointly evaluates structural solutions for the lifting mechanism in a bridge crane, in order to emphasize the technical aspects of system reliability in this context.
3
Content available Diagnostic and management system specified for control of engine equipped with the HCCI combustion technology
Puškár M., Kopas M., Puškár D.
Diagnostyka
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2018
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Vol. 19, No. 4
39--44
EN
On the present there is very intensively emphasized the environmental protection, which is also connected with reduction of emissions produced by the vehicles. The actual European emission standard EURO 6 will be replaced very soon with the new and even stricter standard EURO 7. There is a well-known fact that the new regulations are demanding with regard to the NOX emissions. However, there is at disposal a suitable technical solution, namely in the form of an innovative engine technology, which is called the HCCI. A principle of this technology consists in a self-ignition of the homogenous air-fuel mixture using the compression process. Combustion of the mixture is performed in the whole compression volume without a spark ignition, whereby the NOX emission level is almost negligible. However, this technology is also characterised by several serious problems, for example there is occurring a complication concerning control of the self-ignition phenomenon. The presented article introduces an original diagnostic system, which enables to control the whole self-ignition system and in this way to ensure a reliable operation of the HCCI engine. This system is patented now as well as it was tested in an experimental vehicle built for the international competition “shell eco marathon”.
4
Content available Assessing the need for rope replacement in crane lifting equipment after change of crane operational parameters
Kuľka J., Mantič M., Kopas M., Faltinová E.
Advances in Science and Technology. Research Journal
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2017
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Vol. 11, no 2
226--230
EN
This article describes a specific analysis and evaluation process of a foundry crane installed in a steel mill. The main task was to analyse the possibility of increasing the lifting speed of the crane in order to improve the efficiency of the production process. The condition of the steel supporting structure of the given foundry crane was assessed by means of the performed experimental measurements and calculations. The present article describes the special experimental/analytical methodology for the evaluation of the crane steel construction and lifting and travelling mechanisms. Furthermore, the required modifications of the individual crane construction parts are explained.
5
Content available Special device for continuous deceleration of freight cableway trucks
Mantič M., Kuľka J., Kopas M., Faltinová E., Petróci J.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2016
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z. 91
89--97
EN
This paper is focused on the design of an auxiliary braking device for freight cableway trucks. The device provides continuous deceleration for the trucks before they arrive at the unloading station. It presents an alternative to manual deceleration, which poses safety hazards and is therefore a less suitable option. The design distinctly accommodates the spatial disposition at the unloading station and involves minimal interventions to the existing steel structure. Above all, it aims to increase safety by eliminating the need for human input in the process of decelerating the trucks before they are emptied. The proposed design solution was successfully applied in a real operation.
6
Content available Kinematic linkages in the hinged undercarriage of a mobile working machine
Kuľka J., Kopas M., Faltinová E., Mantič M., Bigoš P.
Zeszyty Naukowe. Transport / Politechnika Śląska
|
2016
|
z. 91
81--88
EN
The main purpose of this article is to present a possible description of kinematic characteristics concerning the direction of travel of a selected mobile working machine in motion, namely, a hinged loader. This description is presented in the form of equations, which define the circumferential velocity as well as the angular velocity of the vehicle wheels during a ride involving a curve. In this way, it is also possible to describe a function of the axle differential.
7
Content available Increasing durability in steel wire rope installed in special transport equipment
Kopas M., Kuľka J., Mantič M., Faltinová E., Bigoš P.
Zeszyty Naukowe. Transport / Politechnika Śląska
|
2016
|
z. 91
71--80
EN
In this paper, special transport-handling equipment is presented for the purpose of pushing wagons in a trans-shipment facility. During operations, the rotary tilter device, which is an integrated part of the trans-shipment process, leads to excessive wear of the steel wire rope used for pushing wagons by means of a pusher system. Therefore, the main task was to propose a suitable design modification of the given pusher system in order to eliminate excessive wear of the rope and, in turn, to prolong operational durability for this steel wire rope, as well as for the whole technical system.
8
Content available QFD – support to higher efficiency of industrial automotive production
Paulikova A., Cekanova K., Kopas M.
Production Engineering Archives
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2016
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Vol. 10, No. 1
21--24
EN
This paper deals with transformation of the customer's requirements into the specified technical parameters by means of the QFD (Quality Function Deployment) method on condition that the customer disposes of basic technical knowledge. The relevant technical parameters are describing an engineering product, which is chosen from the automotive industry area. The QFD method enables elaboration of the individual functions of quality using a multi-phased mapping process in order to transform efficiently the customer's requirements into the real technical parameters of the given product. The chosen technical product is the petrol engine 1.2 Ecotec® installed in the passenger car and it is working in the functional connection with 5 stage manual gearbox. This article analyses in detail only the first phase of the petrol engine production, taking into consideration the given technical requirements. The following step of this process is the next phase, which is focused on the engine aggregates, further it is the phase of the engine aggregate production and the final phase is the global production.
9
Content available Diagnostics and optimisation of crane track durability in metallurgical plant
Kuľka J., Faltinová E., Kopas M., Mantič M.
Diagnostyka
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2016
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Vol. 17, No. 3
41--46
EN
This paper deals with questions concerning technical diagnostics and optimisation of fatigue durability for the crane track beams installed in a metallurgical plant. The fatigue durability is determined using a strain gauge measurement in order to calculate the relevant residual durability of the crane track beams. Consequently, there are proposed suitable measures that are necessary with regard to the next operation of the given crane track, which is supporting a bridge crane.
10
Content available Autonomous online system for evaluating steel structure durability
Mantič M., Kuľka J., Faltinová E., Kopas M.
Diagnostyka
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2016
|
Vol. 17, No. 3
15--20
EN
The article deals with the design of equipment and its application possibilities for on-line monitoring of operational stress traverse mechanisms. By processing of load spectra it is possible to predict the remaining life in the selected areas of the construction.
11
Content available Identification of technical state and optimisation of operation of transport-handling equipmentIdentification of technical state and optimisation of operation of transport-handling equipment
Bigos P., Mantic M., Kopas M.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2014
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z. 84
61--66
EN
This paper describes a real example from the practice concerning an analysis of technical state and operational optimisation of the given transport-handling equipment, which is installed in a trans-shipment station specified for transport and handling of bulk materials. By means of identification of a faulty technical state of this transport equipment there was determined the main cause of a damage process, which occurred during current operation. Consequently, it was possible to perform an optimisation of the relevant technical parameters in order to eliminate the negative phenomena.
PL
W artykule przedstawiono realnie rozwiązywany przypadek z praktyki technicznej, którego podstawą była analiza stanu technicznego oraz optymalizacja działania konkretnego urządzenia transportowo-załadunkowego, zainstalowanego w przedsiębiorstwie przeładunku materiałów sypkich. Za pomocą identyfikacji pierwotnego stanu technicznego - uszkodzenie - wspomnianego urządzenia transportowego została ustalona przyczyna jego uszkodzenia, a następnie za pomocą przeprowadzonej optymalizacji właściwych parametrów technicznych zostały wyeliminowane negatywne wpływy podczas pracy.
12
Content available Innovative-optimisation approach to design of constructive component in bulk solid storage bin
Kopas M., Faltinova E.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2012
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z. 76
87--92
EN
There is presented in this paper a special problem concerning transport of bulk materials in the framework of complex logistic systems. There are typical problems occurring in silos, namely creation of funnels, arches and central tunnels. A quite simple, but efficient methods, which is suitable for elimination of the above-mentioned negative occurrences, is application of the so-called passive element installed inside in the silo. There is described in this paper a methodology applied for a design process, which enables to project the passive element in order to eliminate the above-mentioned negative phenomena in silos.
PL
Optymalizacja elementów maszyn znajduje zastosowanie również w dziedzinach, które są mniej typowe z punktu widzenia zastosowania. Takim ilustracyjnym przypadkiem jest metodyka projektu elementu pasywnego w wysokim zbiorniku materiałów sypkich. W artykule jest przedstawione innowacyjne podejście do rozwiązania projektu konstrukcji z zastosowaniem elementu pasywnego, przy wykorzystaniu nowoczesnych symulacyjnych procesów obliczeniowych. Element pasywny jest instalowany w wysokich zbiornikach w celu wyeliminowania występujących w nich negatywnych zjawisk.
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