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Development of two-stroke motocross engines
Přeborovský, Jan ; Miler, Petr (advisor) ; Prikner, Patrik (referee)
The purpose of this thesis is to summarize the development of two-stroke motorcycle engines in the Word. First part is all about history of motocross both in The Czech Republic and the World. This part also includes main milestones of motocross and another sports which are developed from this sport. Second part is devoted to history of two-stroke engines. Third part explains principle of operation of two-stroke engines including description of main parts ant their function. Fourth part counts seven sections. These sections are about development of two-stroke motocross engine from the very beginning to the present, description of main changes in development of these engines. Fifth part evaluates the development of two-stroke motocross engines and considers the next step in the development.
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Evaluation of advanced engineering use in tropics and subtropics
Mikuláš, Dalibor ; Prikner, Patrik (advisor) ; Kumhála, František (referee)
Modern agriculture systems use largely powerful machines with respect to its operation potential. This trend extends to countries with low levels of agriculture, where it can be found part of global agricultural production. Primarily soil properties affect the use of modern agricultural technology in specific regions; however, agricultural machinery manufacturers still adapt traction properties for specific climatic conditions. The aim of this thesis was to analyze and assess the current state of agricultural machinery in specific regions of the tropics and subtropics, where agricultural systems are focused on the production of crucial crops for food and industrial use.
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Prediction of permitted load limits for agricultural tyres
Strach, Andrej ; Prikner, Patrik (advisor) ; Kroulík, Milan (referee)
The main objective of this thesis is the analysis and comprehensive review of agricultural tires designed for agricultural tractors highest performance class. Another part deals with the description and evaluation of major parameters for calculating the contact surfaces of tires with respect to an individual combination of inflation pressures and loads. The first part was prepared by literature review. Followed by laboratory testing focused mainly on determining the tire contact area with respect to an individual combination of inflation pressures and loads. The first part of the testing procedure was aimed at verifying the functionality and accuracy of the Plantograf. The second part of the test procedure included the estimate of the relationship between the wheel load and pressure distribution in the contact area of the tread of the tire under static loading. The last part of the test procedure consists in comparison of static and dynamic load tires. The measured and calculated values were processed into the relevant tables and graphs.
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Progressive conception of off-road vehicles with respect to traction properties
Michal, Jakub ; Prikner, Patrik (advisor) ; Jindra, Petr (referee)
The aim of bachelor thesis was compile a summary of meaningful traction and construction chassis parameters containing fundamental principles of contemporary
off-road trial race cars. The introduction part showed a short presentation of off-road car trial races. The aim of the work, it was necessary establishing basic parameters of off-road trial race cars as a basis for the design of best race trial cars. Firstly, the parameters were used as stoned to a best off-road trial car design. These parameters have been arranged into two chapters Static, design parameters and Dynamic, traction properties. Then subparameters of off-road trial car have been determined as a specific example in the thesis. The analysis of these outputs confirmed close relationship and dependence fully. Finally, methods have been specified using a fundamental terramechanics approaches implemented in calculation of required driving torque under specific terrain conditions.
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