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Increasing Single Cylinder SI Two-Stroke Engine Performance
Stejskal, Miroslav ; Drápal, Lubomír (referee) ; Svída, David (advisor)
This thesis deals with two-stroke engine design modifications to enhance its performance parameters. The introduction summarizes the various solutions of two-stroke engines. The next part deals with design modifications of the engine power, their implementation and subsequent modification. The work includes strain and stress analysis of the piston, which includes a complete indication of pressures in two-stroke engine. The achieved results of FEM analysis were used to design better piston geometry.
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Innovation of built-up crankshaft for minibike engines
Doležal, Lukáš ; Mazůrek, Ivan (referee) ; Hanuš, Stanislav (advisor)
The present diploma thesis deals with innovation of built-up crankshaft of Blata minibikes. Minibike is the type of a small two-stroke motorcycle equipped with an internal combustion engine of the volume 40 or 50 cm3. The machine is designed for racing circuits; not only for young riders but also for seniors. The innovation is in the design and verification of pressed connections in the imposition of major pins in the arms of the crankshaft. Pressed connections are designed on the basis of the analysis of force interaction on the crankshaft at maximum revolutions. The proposed solutions are verified by FEM calculations. Based on the results, the best option is selected. For the selected option, the impact of force interaction at maximum machine performance is studied. Finally, on the basis of these facts, designing, technological and economic analysis of feasibility of new production technology is carried out.
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Two-stroke Engine Pre-ignition Controller with Microcontroller
Veselý, Tomáš ; Vorel, Pavel (referee) ; Šebesta, Jiří (advisor)
This paper deals with the problem of two-stroke engine pre-ignition controller with the use of microcontroller for single-cylinder engine and double-cylinder engine. The mechanical design is drawn for motorcycles JAWA and ČZ and for engines of the same mechanical type. The establishment uses non-contact status analysis of engine with non-electric sensor. The very important thing for the design is the simplicity of the establishment. The other important thing is the minimisation of mechanical arrangement of engine and the vehicle as a whole. The importance of this establishment is non-contact switching and the possibility of changing pre-ignition maps depending on the number of rotations per minute, the temperature and the load of the engine.
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The future of gasoline two-stroke engines
Kříž, Jakub ; Komenda, Lukáš (referee) ; Mazůrek, Ivan (advisor)
My thesis deals with the historical development of two-stroke petrol engines from the very establishment of a two-stroke cycle, mapping the technological development of these engines up to present day, where, in the second half the attention is devoted to the direct comparison of two-stroke engine and a four-stroke engine in the field of ultralight aircrafts.
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Piston group of a one-cylinder gasoline engine
Lux, Josef ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis deals with a piston set of the internal combustion engine. The main goal is to perform strength check analysis of the internal combustion engine piston set using analytical methods of elasticity and strength. Cultivator PF-62 was chosen to determine the basic parameters of the crankshaft mechanism and plot the force distribution. Results of the strength check analysis are evaluated in the final part of this thesis.
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Cylinder unit of motocycle two-stroke engine
Stejskal, Miroslav ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
Miroslav STEJSKAL Cylinder unit of motorcycle two-stroke engine In the beginning is briefly described two-stroke engine features. Furthermore, according to the set of basic geometric and thermodynamic parameters, the maximum pressure in the cylinder during one engine cycle. For the selected operating modes are carried out strength tests of the upper piston and connecting rod eye. In conclusion, the results are evaluated.
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Two-stroke engines of road racing GP motorcycles
Opluštil, Vít ; Svída, David (referee) ; Drápal, Lubomír (advisor)
The aim of this thesis is description of two-stroke road racing motorcycles dated from first race in GP championship to present, including en explanation of next probable development in future. Thesis deals with development of particular main parts of two-stroke combustion engine over time too and its influence for modernizing two-stroke motorcycle for daily use.
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Two-stroke compression-ignition aircraft engines
Pochop, Ladislav ; Svída, David (referee) ; Drápal, Lubomír (advisor)
This thesis is a treatise on two-stroke diesel aircraft engines. Describes the principle functions of two-stroke diesel engine, its differences from the four-stroke engine and petrol engine. It also deals with the historical development of two-stroke diesel aircraft engines in the context of the development of piston aircraft engines in general. Indicates the best-known two-stroke diesel aircraft engines and outlines possible development of this type of engines in the near future.
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The present state and development trends of engines for motorcycles
Peňáz, Jan ; Píštěk, Václav (referee) ; Rauscher, Jaroslav (advisor)
This bachelor thesis describes the actual situation of construction solutions of small motorcycles engines. And then this thesis compares power and economic parameters of these engines.The thesis shows watched parameters in the diagrams and in the tables. From this we deduce the direction which the small motorbikes engines take. In the conclusion we summarize the main development tendencies and trends for the future
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