Temat: CI combustion engine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Preliminary tests on an integrated laboratory control system for the feeding system of a dual - fuel diesel engine and its load
Autorzy:: Wierzbicki, S.
Śmieja, M.
Piętak, A.
Powiązania:: https://bibliotekanauki.pl/articles/244419.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: CI engine
engine test bed
CR system
control system
combustion engine tests
Opis:: Comprehensive testing of diesel engines currently requires not only a control system for the feeding system of the engine, but also a system ensuring precise control of its load and providing constant measurement conditions. Additionally, it is necessary during the tests to record a considerable number of operating parameters of both the engine and the loading system. The currently available stands for diesel engine tests, the so-called “engine test beds”, are standardly-equipped with special systems controlled using computer applications to ensure the maintenance of the assumed engine operation parameters. For compression-ignition engines, this most often takes place by control of the accelerator pedal position. In this solution, the engine is controlled by the engine controller, which controls the fuel charge based on the measurement of the rotational speed and the accelerator pedal position depending on the assumed control algorithm. The shortcoming of this solution is no possibility of controlling selected fuel feeding parameters, such as fuel pressure or the injection advance angle. This paper presents preliminary tests on an integrated control system for both engine load and the parameters of fuel fed to a compression-ignition engine. The developed control system enables engine test bed control, which, depending on the measurement variant, ensures the maintenance of a constant rotational speed or a constant engine load as well as control of the Common Rail system actuators.
Źródło:: Journal of KONES; 2013, 20, 2; 393-399
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The concept and construction of the engine test bed for experiments with a multi - fuel CI engine FED with cng and liquid fuel as an ignition dose
Autorzy:: Mikulski, M.
Wierzbicki, S.
Powiązania:: https://bibliotekanauki.pl/articles/246758.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
CI engines
engine test bed
multi-fuel engine
CNG
Opis:: The experiments described in the article aimed at adjusting the engine test bed, its equipment and software to perform comprehensive tests on a dual-fuel spontaneous combustion engine with the main gas dose (methane or biogas) and a liquid fuel ignition dose. The steps undertook during the tests included installing a new engine on the engine test bed, installing its equipment and preparing a dual-fuel feed system. The toxic emissions analysis system was also modified, thanks to which a thorough research based on current test methods was possible. All measurement devices were integrated and are governed by one system of data acquisition and controlling, which ensures repeatable testing conditions. In order to exercise better control over the oil pilot dose injection, the previously used engine was replaced with a Common Rail one, which facilitates better control over the pilot dose injection and ensures controlling the system through an external driver. Providing the engine with a set of measurement systems makes it possible to test it not only with reference to its power and toxic emissions into the atmosphere, but also to the heat absorbed by the cooling system, which enables testing engines for cogeneration units.
Źródło:: Journal of KONES; 2012, 19, 3; 289-296
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Combustion of RME – diesel and NExBTL – diesel blends with hydrogen in the compression ignition engine
Autorzy:: Juknelevičius, R.
Szwaja, S.
Pyrc, M.
Gruca, M.
Pukalskas, S.
Powiązania:: https://bibliotekanauki.pl/articles/247823.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: hydrogen
RME
HVO
NExBTL
PRO Diesel
diesel fuel
CI engine
combustion
emission
Opis:: The article presents the test results of the single cylinder compression ignition engine with common rail injection system operating on biofuels and conventional diesel blends with hydrogen. Two types of liquid fuels were tested: blend of the 7% Rapeseed Methyl Ester (RME) with conventional diesel fuel and Neste Pro Diesel – blend of the 15% Hydrotreated Vegetable Oil (HVO), produced by Neste Oil Corporation with conventional diesel fuel. The purpose of this investigation was to examine the influence of the hydrogen addition to biofuels and diesel blends on combustion phases, autoignition delay, engine performance efficiency and exhaust emissions. Hydrogen fraction was changed within the range from 0 to 43% by energy. Hydrogen was injected into the intake manifold, where it created homogeneous mixture with air. Tests were performed at both fixed and optimal injection timings at low, medium, and nominal engine load. After analysis of the engine bench tests and simulation with AVL BOOST software, it was observed that increasing hydrogen fraction shortened the fuel ignition delay phase and it affected the main combustion phase. Moreover, decrease of carbon monoxide (CO), carbon dioxide (CO2) and smoke opacity was observed with increase of hydrogen amounts to the engine. However, increase of the nitrogen oxide (NOx) concentration in the engine exhaust gases was observed.
Źródło:: Journal of KONES; 2018, 25, 3; 261-274
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effect of butanol blend on in-cylinder combustion process. Part 2: Compression ignition engine
Autorzy:: Tornatore, C.
Marchitto, L.
Mazzei, A.
Valentino, G.
Corcione, F. E.
Merola, S. S.
Powiązania:: https://bibliotekanauki.pl/articles/246225.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: optical diagnostics
combustion process
common rail CI engine
diesel/gasoline blend
diesel/butanol blend
Opis:: To meet the future stringent emission standards, innovative diesel engine technology, exhaust gas after-treatment, and clean alternative fuels are required. Oxygenated fuels showed tendency to decrease internal combustion engine emissions. In the same time, advanced fuel injection modes can promote further reduction in pollutants at the exhaust without penalty for the combustion efficiency. One of the more interesting solutions is provided by the premixed low temperature combustion (LTC) mechanism jointly to lower-cetane, higher-volatility fuels. In this paper, to understand the role played by these factors on soot formation, cycle resolved visualization, UV-visible optical imaging were applied in an optically accessed high swirl multi-jets compression ignition engine. Combustion tests were carried out using two fuels: commercial diesel and a blend of diesel with n-butanol. The fuels were tested at 70MPa injection pressure and different timings. At late injection timing coupled to high EGR rate (50%), the blends increased the ignition delay allowing operating in partially premixed LTC (PPLTC) regime in which the fuel is completely injected before the start of combustion. Strong reduction in engine out emissions of smoke and NOx were obtained with a little penalty on engine efficiency. This limitation was overcome operating at earlier injection timing in which a mixing controlled combustion (MCC) LTC regime was realized. In this regime, a good compromise between low engine out emissions and efficiency was achieved.
Źródło:: Journal of KONES; 2011, 18, 3; 473-483
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Identification method of knock combustion in two-fuel combustion ignition engine
Metoda identyfikacji spalania stukowego w dwupaliwowym silniku o zapłonie samoczynnym
Autorzy:: Różycki, A.
Powiązania:: https://bibliotekanauki.pl/articles/244835.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: spalanie stukowe
silnik o zapłonie samoczynnym
amplituda drgań głowicy
paliwo gazowe
knock combustion
dual fuelling of CI engine
alternative fuel
head vibration
Opis:: W artykule opisano metodę badawczą przy pomocy, której możliwe będzie zdefiniowanie granicznego udziału paliwa gazowego w ładunku dostarczanym do cylindra. Badania na podstawie, których opracowano kryterium zostały przeprowadzone na jednocylindrowym silniku o zapłonie samoczynnym. Wyniki badań wykazały, że zbyt duży udział paliwa gazowego prowadzi do powstawania w procesie roboczym silnika zjawiska spalania stukowego. Zjawisko to silnie oddziałuje na drgania głowicy, powodując gwałtowny wzrost amplitudy drgań w okresie spalania. Wyniki badań i ich dalsza analiza wykazały wysoką korelację amplitudy drgań głowicy z pulsacjami ciśnienia w czasie spalania stukowego niezależnie od zastosowanego układu zasilania. Przeprowadzone badania silnika o ZS zasilanego dwupaliwowo potwierdziły możliwość występowania zjawiska spalania stukowego. Spostrzeżenie to jest na tyle istotne, że przy konwencjonalnym sposobie zasilania silnika o zapłonie samoczynnym spalanie stukowe nie występuje. W związku z powyższym istotne było wytypowanie metody badawczej umożliwiającej analizę tego zjawiska. Z przeprowadzonych w powyższym artykule rozważań wynika, że: możliwe jest wykorzystanie pomiarów drgań głowicy do identyfikowania spalania stukowego w dwupaliwowym silniku o ZS, do identyfikacji najwygodniej jest wykorzystać wartości amplitudy drgań głowicy występujące w okresie spalania, współczynnik korelacji maksymalnych amplitud pulsacji ciśnienia i maksymalnych amplitud drgań głowicy był równy 0,99, zmiana układu zasilania ze standardowego na common rail nie zmienia korelacji pomiędzy amplitudami pulsacji ciśnienia w cylindrze a drganiami głowicy.
The article presents the research method by the use of which the identification of gas fuel limit participation in the charge delivered to the cylinder would be possible. The research, on the basis of which the criterion has been worked out, was carried on one-cylinder combustion ignition engine. The results of the research proved that too big gas fuel participation leads to the rise of the knock combustion phenomenon. This phenomenon strongly affects the head vibrations causing the rapid growth of the vibration amplitude during the combustion period. The results of the research as well as their further analysis showed that a high correlation of the head vibration amplitude with the variables of pressure during the knock combustion occur regardless of the applied power system. Performed research of bi-fuel CI engine affirmed the possibility of occurrence of the knock combustion. Awareness of this is so much essential, that with conventional engine fuelling the knock combustion does not exists. In accordance with above, essential was the selection of research method, which allows the analysis of this occurrence. From considerations carried out in the article, results that: the utilization of the measurements of the head vibrations is possible for identifying the knock combustion in CI bi-fuel engine, most convenient for the identification is the use the amplitude values of the head vibrations occurring in the combustion period, the correlation coefficient of maximum amplitudes of the pressure pulsation and maximum amplitudes of the head vibrations was equal to 0.99, the change of the fuelling system from the standard one to the common rail system does not change correlation between the amplitudes of the pressure pulsation in engine cylinder and the head vibrations.
Źródło:: Journal of KONES; 2008, 15, 4; 479-487
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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