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Wyświetlanie 1-3 z 3
Tytuł:
Optimalisation of the si engine timing advance fueled by LPG
Autorzy:
Fabiś, Paweł
Flekiewicz, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2134867.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
LPG
power charts
timing advance
wykresy mocy
wyprzedzenie czasowe
Opis:
This study is an attempt to determine the control parameters of the control system for gaseous fuels currently used for driving vehicles. It presents the selected dynamic parameters of the car obtained when fueling the engine with petroleum-based LPG. This paper attempts to determine the optimal timing advance of the gas-air mixture and the efficiency of its processing in the drive system of the tested vehicle driven by a four-cylinder engine with a 1.6 dm. More so, this article includes an analysis of the influence of the optimised power charts of the engine on the dynamics of the motion of a motor vehicle running on gaseous fuel. To present changes in the dynamics of movement, indicators and parameters determining changes in the dynamics of vehicle movement, such as dynamic coefficient, acceleration and flexibility were used. Through this analysis, it is possible to verify the optimised power and torque waveform and determine whether the vehicle dynamics improved.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 111; 33--41
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected aspects of the use of gaseous fuels blends to improve efficiency and emission of si engine
Autorzy:
Kubica, Grzegorz
Flekiewicz, Marek
Marzec, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/375318.pdf
Data publikacji:
2019
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
internal combustion
gaseous fuel
methane
hydrogen
LPG
DME
energy efficiency
spalanie wewnętrzne
paliwo gazowe
metan
wodór
efektywność energetyczna
Opis:
The paper presents results of SI engine tests, carried on for different gaseous fuels. The analysis carried out made it possible to define the correlation between fuel composition and engine operating parameters. Tests cover various gaseous mixtures: methane with hydrogen and LPG with DME. The first group, considered as low carbon content fuels, can be characterized by low CO2 emissions. The flammability of hydrogen added in those mixtures realizes the function of combustion process activator and improves the energy conversion. The second group of fuels is constituted by LPG and DME mixtures. DME mixes perfectly with LPG and differently than in the case of other hydrocarbon fuels also consisting of oxygen, which makes the stoichiometric mixture less oxygen demanding. In the case of this fuel, improvement in engine volumetric and overall engine efficiency has been noticed, compared to LPG. During the tests, standard CNG/LPG feeding systems have been used, which underlines the utility value of the research.
Źródło:
Transport Problems; 2019, 14, 1; 95-103
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying Experts Methods in the Selection Procedures of Foresight Development Programs
Autorzy:
Markusik, Sylwester
Cieśla, Maria
Gąska, Damian
Krawiec, Stanisław
Flekiewicz, Marek
Janecki, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/504636.pdf
Data publikacji:
2011
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Opis:
Foresight method is gaining support around the world as a powerful tool that creates common views on future development strategies. It is characterized by a unique feature, which is the maximum participation of stakeholders and experts. The paper presents examples of the results of research carried out based upon the expert methods of foresight procedures. Special attention was paid to different methods of identification and involvement of experts in implementing the projects. The methodology of foresight projects was brought closer, with particular emphasis on those methods which are based on expert knowledge - such as the Delphi technique, panel discussion, brainstorming, STEEP and SWOT analysis methods, public consultation and the scenarios formulation. The result of foresight exploration based on knowledge of experts is the formation of a wide vision of the future development of economy and technology, which helps to make decisions on an effective, long-term strategy of the government, enterprises and scientific institutions. Key words: experts knowledge, foresight.
Źródło:
Logistics and Transport; 2011, 12, 1; 75-82
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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