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Single-cylinder Minicross Engine
Havlen, Prokop ; Svída, David (referee) ; Drápal, Lubomír (advisor)
The first part of this thesis describes the different systems of the refill cylinders in two-stroke engines The second part introduces the issue of motorcycling class minicross and its specifics. In the final part is presented the construction of a modern two-stroke engine, which can be used for motorcycle class minicross. In the individual chapters are sketched design of the crank mechanism, gears and automatic clutch. Detailed analytical calculations are attached in the appendices at the end of the text in source code form.
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A Project for the production of the transmission case for the winch
Hrbáček, Emil ; Strejček, Jan (referee) ; Kalivoda, Milan (advisor)
The project elaborated within engineering studies. The project is submitting design of technology production of precise holes for rolling bearings which are located in transmission case for the winch. Variants of production technologies were designed based on the construction drawings of transmission case. Chosen type of technology is boring. Boring was performed on the CNC machine DMF 180 produced by DMG MORI. DMF 180 allows precise production of bearings holes. Via selected criteria, it was selected the better variant of two. The criteria were: cylindricality, cohesiveness, position of elements and surface quality.
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The utilization of wireless modules for data acquisition
Machů, Petr ; Mácha, Tomáš (referee) ; Martinásek, Zdeněk (advisor)
In the bachelor‘s thesis I deal with modern methods of wireless data transmission in decentralized wastewater treatment. I suggested three different architectures and various types of wireless modems related to them. Then I design the experimental workplace with the convenient architecture for an autonomous network. For data collection I use PLC (Programmable Logic Controller) Foxtrot series with the central unit of CP-1005 and I use two modems Conel CDL 800 operating in the unlicensed band 869 MHz for wireless transfer. In the Mosaic I design a program for reading inputs from wastewater treatment plant and maintenance of serial channel, in Radwin program I configure wireless modems for the point-point transfer. I present Hyperterminal configuration and delivered date are displayed in it. Finally, I design applications in PHP language that converts data into a graphic form. In conclusion, I present opportunities for further development and improvement of the network.
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Gear design with tolerance analysis
Křivohlavý, Petr ; Křupka, Jiří (referee) ; Svoboda, Petr (advisor)
The thesis is concerned with tolerances of machine elements. The thesis explains dimensional and geometrical tolerance, surface texture and their interdependence. On the basis of the stated facts a simple technique is established to be followed when setting tolerance of machine elements. The procedure is further applied on the transmission that was selected from the three models on hand. The technique is focused mostly on shaft and gear tolerance. The thesis should provide the reader with understanding of how to tolerate selected machine elements.
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Reconstruction of Polishing Apparatus
Kotiza, Tomáš ; Šperka, Petr (referee) ; Svoboda, Petr (advisor)
This thesis is focused on a reconstruction of polishing machine for sphere objects which is located in laboratories of Institute of Machine Design Brno University of technology. The first part of the thesis contains a brief summary of existing polishing machines with description of their basic principles. The other sections discuss polishing, bearing balls, drives for this machines and surface roughness. The second part is dedicated to construction designs for reconstruction of the polishing machine. In the final part is chosen optimal variant which is well suited for requirements on functionality, efficiency and production simplicity.
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Design of gearbox for electric motorcycle
Novotný, Tomáš ; Prokop, Aleš (referee) ; Svída, David (advisor)
The aim of the thesis is a summarization of current state of knowledge of motorcycle clutches and transmissions and subsequent design of clutch and transmission for electric powered motorcycle. The main topic is design of the clutch of which components were processed by stress analysis and designed for fatigue safety. On top of that, the thesis deals with the design of primary transmission and gear ratios.
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Internal combustion engines of Volkswagen group
Kalnaši, Radoslav ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
Radoslav Kalnaši Internal combustion engines of Volkswagen Group This bachelor thesis evaluates development of the Volkswagen combustion engines, the present state and the future perspective. It provides description of the historical evolution of the Volkswagen combustion engines. The thesis concentrates on the present Volkswagen drive unit and possibilities of the future Volkswagen engines development.
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Photocell as a power source for a small DC motor of RC car model
Nábělek, Ondřej ; Huzlík, Rostislav (referee) ; Mikulčík, Aleš (advisor)
The goal of this project is to acquaint the reader with problems of solar cells and project of systems for solar cells power a small electric machine performance. Preliminary discussion of the energy produced by the Sun incident on the Earth. Another chapter contains information about the fundamental function of solar silicon cells and conversion of solar energy to electric energy. Main part of this work is devoted to various types of solar cells, production materials, the structure of cells and solar panel. The last part is a measurement system for solar cells, the verification of theoretical assumptions and evaluate the results of the work.
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Tuner for UHF Receiver with Low Power Consuption
Kaštánek, Martin ; Vágner, Petr (referee) ; Urbanec, Tomáš (advisor)
The purpose of this work was to make a proposal for input parts of receiver for band 430 to 440 MHz. A model of chosen semiconductor triode BFP540 was created in simulation software. Possibilities how to decrease consumption of this semiconductor triode, keeping the profit, were investigated through the simulation.In compromise consumption, keeping the profit of the amplifier - an optimal operating point for this semiconductor triode UCE = 1,2 V and IC = 2 mA was found. It was tested through the testing wiring with noise microstrips conformity. Ascertained knowledge was used for construction of tuner for UHF receiver. An operating point of input amplifier of UHF receiver was owing to power supply amplifier forced for bigger effectiveness to UCE = 2,65 V and IC = 2,0 mA. Suppression of mirror frequency is provided with Helix filter of the third order, because of intermediate frequency 10,7 MHz. Mixing on intermediate frequency is made again by semiconductor triode BFP540. Selectivity of receiver is provided with intermediate frequency crystal filter 10,7 MHz with bandwidth 15 kHz. Designed input part enables reception of SSB, FM and digital types of modulation.Bandwidth intermediate frequency exit is adapted to this request To receive particular modulation , it is necessary to complete intermediate frequency signal way with appropriate intermediate frequency filter.
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