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Valvetrain of Compression-ignition Tractor Engine
Mikula, Vojtěch ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This bachelor thesis deals with the main types and parts of the valvetrain systems of four-stroke engines. In the first part of the thesis are presented the most widely used versions of valvetrains and their use in the tractor engines. In the next part of the thesis is performed the construction and stress calculation of the valvetrain according to proposed proportions.
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A new Variant of the Technology Components of the Valve Body
Kouřil, Vít ; Prokop, Jaroslav (referee) ; Kalivoda, Milan (advisor)
Bachelor thesis compares two technology variants of production on the inner part recess of the valve body type S43. This is a closing forged valve for power. The work analyses and displays structural design of the slide. After presenting existing technology of inner recess new technology is described in the thesis. The comparison was made with respect to machinery companies Armaturka Vranová Lhota, Inc. Assessment of better technology is described in the technical-economic evaluation at the end of thesis.
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Automation of track for measurement of water valves characteristics
Lekeš, Pavel ; Havlíková, Marie (referee) ; Šedivá, Soňa (advisor)
My diploma thesis describes upgrade of flowbench serving as test rig for regulation valves characteristic measurement. At the beggining, there is an introduction to the water regulation valves theory followed by current machine condition description. Next chapter defines needed improvements and at the end follows proposition of improvements and necessary component definition and final realization. Final chapter summarizes complete project.
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Line for manufacturing parts for car engine volume thermoforming
Smola, Jiří ; Humlíček, Jaroslav (referee) ; Omes, Jiří (advisor)
The aim of this diploma thesis is to design valve production line for combustion engines by volume forming with heat. The production of line will be 2 500 000-10 000 000 pieces per year. In the introduction of this thesis are described production technologies. Next part is about design of production lines and description of each machine for each technology. Then are made the basic calculations for designe for each machine.
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Wireless thermostat
Králíček, Martin ; Viščor, Ivo (referee) ; Kincl, Zdeněk (advisor)
The Master’s thesis discusses wireless thermostat for a control boiler. In order to complete the project we have to design and realise the whole project with software design. The system contains two units, a master control and a measurement of regulation units. The project initially talks about regulation of heating systems for family houses and larger buildings like schools and stores for example. Next, the project describes the control and regulation units and their potential extension for effective and economical operation. Both units are equipped with microcontrollers, which these control each of function. The communication between both units is provided by wireless interface in free radio band ISM. There is a user interface for the master control unit’s regulation process. The measurement and regulation unit has only the possibility to switch between manual and automatic control for regulation of heating system.
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Class A audio power amplifier with tubes
Krutílek, David ; Brančík, Lubomír (referee) ; Kratochvíl, Tomáš (advisor)
The topic of my bachelor´s theis is of the class A audio power amplifier using vacuum tubes which is completed with phono preamplifier and input selector. There are used ECC 83 and ECC 88 vacuum tubes for the pre-amplifier design, then EM 84 tubes for the „eye-magic“ equalizer and 300B tubes for the power amplifier design. The maximum output power is 2 x 20W to 8 ? load. In this paper there are presented schematics of the pre-amplifier and power amplifier too. The aim of this bachelor´s project was make complete design of laboratory prototype (scheme, layout of printed circuit, part list and placemnet), realisation function of prototype and laboratory measurements.
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Design of air pump
Gábriž, Michal ; Haltof, Vladimír (referee) ; Ondra, Martin (advisor)
The topic of this bachelor‘s thesis is design of air pump. The work includes an analysis of products and manufacturers, further it examines the current market situation and the technology used in this issue. The result of these analyzes are certain shortcomings and space for improvement. Based on the findings, it is created a custom design of the air pump, described in terms of aesthetic, structural and other aspects of design.
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Fluid power heating system
Paták, Jiří ; Topič, Jan (referee) ; Počinková, Marcela (advisor)
The theoretical part deal with problematic of fluid power heating system. The experimental part deal with measurement of the characteristic of circulation pump and measurement of valves - ball valve. The project solves the heating and hot water preparing for the new administrative building in Žďár nad Sázavou. The building has 3 floors. As a source of heat for the winter season is designed gas boiler, for hot water preparing is also used the same gas boiler. The heat source is placed in a separately accessible room.
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Safety valve for presses
Macků, Ondřej ; Vostřel, Josef (referee) ; Škopán, Miroslav (advisor)
This diploma thesis deals with the design of the safety pneumatic valve. This valve is a part of the two-handed control system device which is used with mechanical press. Operational calculation of important parts and strength control of the most stressed construction part is done in this paper. Further the calculation defining leaking of compressed air from one of the chamber of valve is presented. The result of this calculation is the time dependence of the chambre pressure. Partial drawing documentation which contains production drawings of the main parts of valve and the drawing of the assembly is a part of the appendix.
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General Solution of Valvetrain Mechanical Losses
Mynařík, Aleš ; Maršálek, Ondřej (referee) ; Novotný, Pavel (advisor)
This master's thesis deals with the determination of mechanical losses in the valvetrain of the combustion engine. It describes the computational and experimental methods of determining the mechanical losses of valve mechanism. The practical part of the thesis focuses on the programing of structures in Matlab. This application calculates the values of mechanical losses of valvetrain and displays their graphical representation. This program is used for computing the mechanical losses of the selected real engine.
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