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    Wyświetlanie 1-6 z 6
    Tytuł:
    The energy - efficient two - phase driving cycle (eta n greather than 1) can efficiency eta n in vehicles be higher than 1.0 ?
    Autorzy:
    Ubysz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/242928.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    efficiency
    driving cycle
    overall engine efficiency
    Opis:
    The study presents an important part of fourth chapter of the monograph 'Energy Consumption in Relation to Fuel Efficiency Under Complex Driving Conditions' (2003) concerning opportunities to improve vehicle drive efficiency through application, during one phase of driving in neutral in two-phase driving cycle. Theoretical simulation of total energy consumption in vehicles with SI engine provided explanation of a relatively low fuel efficiency observed under real driving conditions in serial cars [1]. The study cites the original method of calculations developed by the author in order to calculate the efficiency of vehicle power unit in two-phase driving cycle assuming that one of the phases might be non-driving. The calculations were made for complex driving conditions, i.e. simulated changes with predefined steps for road slope (-3.5o to 3.5o), acceleration (-0.36-0.36 m/s2) and average speed (60-140 kmph) for a distance of 2x500 m. The results of calculation variants for each type of a drive system of a car proved that there are significant limitations of optimising the fuel consumption of cars. The first one is conditioned by the fact that the engine works at full dynamic load and the second one by the fact that idle running is against the 'Highway Code'.
    Źródło:
    Journal of KONES; 2012, 19, 4; 633-642
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of alcohols to dual – fuel feeding the spark-ignition and self-ignition engines
    Autorzy:
    Stelmasiak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/258762.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    dual-fuel engine
    alcohol
    share of methanol
    overall efficiency
    toxicity
    Opis:
    This paper concerns analysis of possible use of alcohols for the feeding of self - ignition and spark-ignition engines operating in a dual- fuel mode , i.e. simultaneously combusting alcohol and diesel oil or alcohol and petrol . Issues associated with the requirements for application of bio-fuels were presented with taking into account National Index Targets , bio-ethanol production methods and dynamics of its production worldwide and in Poland. The considerations are illustrated by results of the tests on spark- ignition and self- ignition engines fed with two fuels : petrol and methanol or diesel oil and methanol, respectively. The tests were carried out on a 1100 MPI Fiat four- cylinder engine with multi-point injection and a prototype collector fitted with additional injectors in each cylinder. The other tested engine was a SW 680 six- cylinder direct- injection diesel engine. Influence of a methanol addition on basic operational parameters of the engines and exhaust gas toxicity were analyzed. The tests showed a favourable influence of methanol on combustion process of traditional fuels and on some operational parameters of engines. An addition of methanol resulted in a distinct rise of total efficiency of both types of engines at maintained output parameters ( maximum power and torque ). In the same time a radical drop in content of hydrocarbons and nitrogen oxides in exhaust gas was observed at high shares of methanol in feeding dose of ZI ( petrol) engine, and 2-3 fold lower smokiness in case of ZS ( diesel) engine. Among unfavourable phenomena, a rather insignificant rise of CO and NOx content for ZI engine, and THC and NOx – for ZS engine, should be numbered. It requires to carry out further research on optimum control parameters of the engines. Conclusions drawn from this work may be used for implementation of bio-fuels to feeding the combustion engines.
    Źródło:
    Polish Maritime Research; 2014, 3; 86-94
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The evaluation of the regularity of the combustion process in the SI engine fueled with petrol and ethanol
    Autorzy:
    Stelmasiak, Z.
    Pietras, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/133367.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    ethyl alcohol
    overall efficiency
    engine smoothness
    combustion pressure
    indicated pressure
    alkohol etylowy
    sprawność ogólna
    równomierna praca silnika
    ciśnienie spalania
    ciśnienie indykowane
    Opis:
    In the paper are presented results of a research work concerning automotive spark ignition engine fueled with ethyl alcohol. The research was performed on a Fiat 1100 MPI engine adapted to dual fuel feeding. Injection of ethyl alcohol was accomplished in area near inlet valve with use of original injectors, the same as used in case of gasoline feeding. The subject-matter of the study was to compare smoothness of engine operation fueled with alcohol in relation to parameters of the engine fueled traditionally with gasoline. There were analyzed combustion parameters calculated on the basis of recorded indicated diagrams of successive individual combustion cycles and averaged diagrams of successive 50 cycles. Performed investigations are pointing at smooth engine operation running on neat alcohol, and on improvement of performance parameters such as effective power and overall efficiency.
    Źródło:
    Combustion Engines; 2017, 56, 1; 94-99
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the range extender for a 48 V electric vehicle
    Autorzy:
    Noga, Marcin
    Gorczyca, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/133579.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    electric vehicle
    range extender
    spark ignition engine
    overall efficiency
    three-way catalyst
    pojazd elektryczny
    silnik o zapłonie iskrowym
    sprawność ogólna
    katalizator trójdrożny
    Opis:
    The article deals with the concept, development and results of preliminary tests of a range extender for an electric light commercial vehicle Melex with a 48 V electrical system. The purpose of the project is to build a prototype of the range extender powered by an internal combustion engine that will increase the range of the vehicle with electric drive, and at the same time will be characterized by a high efficiency and low exhaust emissions. The developed range extender is a combination of a 163cc single-cylinder combustion engine with a generator joined through a ribbed belt transmission. The 3-phase generator from a heavy-duty vehicle was used. In order to match the output voltage of the generator to the system voltage of the electric vehicle, an external adjustable regulator and a rectifier bridge with an increased operating voltage were used. The range extender was attached to a body of the electric vehicle by means of a welded frame made of thin-walled steel profiles. Initial tests of the developed range extender showed its proper interaction with both the lead-acid battery of the vehicle as well as with the nickel-metal hydride battery (NiMH) adapted to 48 V voltage from a hybrid electric vehicle. A maximum output power exceeding 2 kW was obtained. Maximum value of the overall efficiency of the range extender reaches up to 18.8%, which is a high value considering the small size of the used engine and the type of generator. The directions for further development of the range extender were also revealed in this paper.
    Źródło:
    Combustion Engines; 2019, 58, 2; 113-121
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of operational parameters and stability of performance of an automotive SI engine powered by methyl and ethyl alcohols
    Autorzy:
    Pietras, Dariusz
    Stelmasiak, Zdzislaw
    Pietras, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/24202477.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    methyl alcohol
    ethyl alcohol
    operational parameters
    overall efficiency
    indicated pressure
    smoothness of engine operation
    alkohol metylowy
    alkohol etylowy
    parametry użytkowe
    sprawność ogólna
    ciśnienie indykowane
    równomierność pracy silnika
    Opis:
    The article presents research results performed using automotive spark ignition engine run on methyl and ethyl alcohols as well as gasoline as a reference fuel. The research was performed on automotive engine of Fiat 1100 MPI type. The aim of the conducted analysis was to compare the operational parameters of the engine. These parameters included engine power output, overall efficiency, emissions of toxic components in exhaust gases, and a comparison of the combustion process course. This comparison was conducted based on recorded and averaged indicator diagrams, as well as individual combustion cycles. The averaged diagrams were used in analysis of the pressure course during combustion, in analysis of pressure growth rate and heat release rate. Diagrams of individual combustion served for assessment of operational smoothness of the engine when fuelled with alcohols. As the reference, parameters measured in case of gasoline fuelling were used.
    Źródło:
    Combustion Engines; 2023, 62, 3; 129--140
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elektromechaniczny siłownik zmian faz rozrządu w silniku spalinowym
    Electromechanical actuator for valve timing changes in an internal combustion engine
    Autorzy:
    Larisch, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/134047.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    rozrząd silnika czterosuwowego
    zmiana faz rozrządu
    mechanizmy regulacji faz rozrządu
    systemy sterowania rozrządem
    silniki spalinowe
    napełnienie silnika
    sprawność ogólna
    timing four-stroke engine
    changing valve timing
    valve timing mechanism
    timing control system
    internal combustion engines
    filling the engine
    overall efficiency
    Opis:
    W Katedrze Silników Spalinowych i Pojazdów Akademii Techniczno Humanistycznej w Bielsku-Białej prowadzone są prace dotyczące rozwoju silników spalinowych zarówno w zakresie badań jak i konstrukcji z dużym udziałem dyplomantów . W artykule przedstawiono koncepcję urządzenia sterowanego elektromechanicznie przeznaczonego do zmian kątowego położenia wałka rozrządu, a tym samym sterowania fazami rozrządu. Projekt wstępny urządzenia powstał przy udziale studentów. Proponowany mechanizm do sterowania chwilowym kątowym położeniem wałka rozrządu wykorzystuje elektromagnes przyciągająco-odpychający. Zaprojektowane urządzenie zgodnie z założeniami cechuje się małymi gabarytami. Zastosowanie tego mechanizmu nie wymaga istotnych ingerencji w konstrukcję silnika i w układ rozrządu takich jak, drążenie kanałów olejowych w wałku rozrządu. Urządzenie przewyższa szybkością działania większość opisanych rozwiązań zmiany faz rozrządu Zaprezentowana w pracy koncepcja mechanizmu ma charakter szkiców konstrukcyjnych. Rozwiązanie jest ciągle optymalizowane pod względem kinematycznym, dynamicznym i wytrzymałościowym.
    The Department of Internal Combustion Engines and Automotive Technical University of Bielsko-Biala, work is underway on the development of internal combustion engines, both in research as well as the construction with a large share of graduates. This paper presents the concept of controlled electromechanical device designed to change the angular position of the camshaft and thus control valve timing. A preliminary draft of the device was made with the participation of students. The proposed mechanism for controlling the instantaneous angular position of the camshaft uses an electromagnet. Designed in line with the assumption features a small size. This mechanism does not require significant intervention in engine construction and the timing system such as drilling oil channels in the camshaft. The device can outperform time of operation most of described solutions of actuators. Presented in the work of the mechanism is a concept design sketches. The solution is continuously optimized in terms of kinematic, dynamic and endurance.
    Źródło:
    Combustion Engines; 2013, 52, 3; 1019-1024
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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