Autor: Blażek, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Spark plug with the increased energy for creating of initial combustion centre
Autorzy:: Blażek, J.
Beroun, S.
Powiązania:: https://bibliotekanauki.pl/articles/248137.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: Ignition of mixture
Variability of working cycles
spark plug
Ignition chamber
Opis:: Variability of the working cycle of the internal combustion engines with the combustion of homogenous mixture is a long-term problem of SI engines. The paper shows a decrease of cycle variability and an increase of the engine efficiency by using a spark plug, whose design allows the ignition of the mixture in the same way as using a classical spark plug by the high-voltage discharge between electrodes of the spark plug and at the same time increases the energy for the development of mixture combustion in the initial phase by a flame jet from a very small ignition chamber. Energy of flame jet for the mixture ignition into compression volume at engine cylinder is fully 100 times higher to energy of high-voltage discharge on the spark plug. The laboratory results of experimental works on vehicle SI engine (the visual inspection of initial phase of burning, course of cylinder pressure, engine power data) are showed. On basis performed tests has been projected the new design of the spark plug with the integrated combustion chamber. According to our engineering design was made the new spark plug with the ignition chamber like functional samples in company BRISK. Proving test with this new spark plug was performed on two different test engines at Department research laboratory on Technical University of Liberec. The experiments confirm the await results: the engine characteristics has been significantly improved. New design of spark plug with integrated chamber it was registered at Bureau of industrial ownership at Prague.
Źródło:: Journal of KONES; 2008, 15, 3; 29-35
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Experimental investigation of the combustion of vegetable oils in diesel engine at low engine loads
Autorzy:: Błažek, J.
Vojtišek, M.
Powiązania:: https://bibliotekanauki.pl/articles/243132.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vegetable oils
diesel fuels
in-cylinderpressure measurement system
combustion engines
emissions
Opis:: Vegetable oils are being increasingly used as fuel in diesel engines in passenger vehicles, with various results. One of the associated problems is excessive emissions of organic compounds at very low engine loads. Aside from an undesirable increase in emissions, such compounds also contribute to the formation of deposits in the engine and in the catalytic reactor. In this study, a typical turbodiesel engine, adapted for operation on vegetable oils, was fitted with fast-response in-cylinder pressure measurement system. The engine was operated on an engine dynamometer at low loads typical for urban driving at several coolant and fuel temperatures. Results will be presented and discussed. Engine and rapeseed oil fuelling system setup, comparison of combustion timing of diesel fuel and rapeseed oil, indicated in-cylinder pressure for diesel fuel and rapeseed oil for different speeds and loads, indicated in-cylinder pressure at original and modified injection timing, comparison of nox and CO2 concentrations at original injection timing, emissions from rapeseed oil relative to diesel fuel at different speeds and loads, effect of injection timing optimization on peak indicated pressure, effect of injection timing optimization on nox and CO concentrations, Brake-specific fuel consumption, are presented in the paper.
Źródło:: Journal of KONES; 2007, 14, 3; 61-72
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Simulation model of combustion engine with direct injection of hydrogen
Autorzy:: Blažek, J.
Brabec, P.
Powiązania:: https://bibliotekanauki.pl/articles/242159.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: Simulation model of combustion engine
direct hydrogen injection
Ricardo Wave
combustion process
spark ignition engine
Opis:: Fuel mixture formation inside a cylinder has become used more frequently in spark ignition engines in recent years. gas internal combustion engines can also benefit from this concept as direct injection into an engine 's cylinder during the compression stroke not only increases its volumetric efficiency but also eliminates adverse anomalies in the combustion process. This paper focuses on the development of a simulation model for a spark ignition engine with direct hydrogen injection into a cylinder. The Wave software was used for the simulation. A part of the paper depicts the model's verification. The study utilized a three-cylinder internal combustion engine with the total cylinder volume of 1.2 dm3. The concept of the engine is based on new, high-pressure injectors with 10 MPa inlet pressure (gas-hydrogen injection directly into the engine cylinder). Utilization of internal fuel mixture formation can be beneficial due to its enabling the control of the combustion process and gaseous emission generation. From the viewpoint of the engine's design, however, internal fuel mixture utilisation is more complicated as injectors have to be built into the cylinder head. The actual engine construction is housed in laboratories of the Technical University of Liberec, Department of Vehicles and Engines.
Źródło:: Journal of KONES; 2009, 16, 3; 15-21
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Automotive SI engine with injection of the liquid LPG into the inlet manifold
Autorzy:: Mareš, J.
Beroun, S.
Blažek, J.
Holubec, R.
Powiązania:: https://bibliotekanauki.pl/articles/246436.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: gas fuel
mixture forming
power reducing
injection of liquid LPG
fuel vaporization
exhaust emission
Opis:: Non supercharged SI engine on LPG with mixture forming by evaporated LPG has lower power by about 8% compared to original petrol engine. This disadvantage can be eliminated by mixture forming by injection of liquid LPG. Report shows the results of the laboratory experimental research on an engine with injection of liquid LPG with the detailed analyses of the energy, power and emission engine parameters in 2 variations of the engine set-up. The thermodynamic analysis of the indicator diagram has shown that the characteristic parameters of the cycle (incl. Parameters of the combustion course) stand practically identical for operation on petrol and on LPG. The measurements on the engine were also oriented on study of conditions in the inlet manifold after injection of the liquid LPG (injection visualization with fuel vaporization, temperature in the intake port) for an explanation of any abnormality on course of the unburned hydrocarbon concentration before catalyst. The experimental results show that automotive engine with injection of liquid LPG like high-quality variation of the car drive with favorable operating economy and positive ecological effects for environment.
Źródło:: Journal of KONES; 2007, 14, 3; 385-394
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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