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Převodovky u moderních traktorů
ŠTĚPKA, Jakub
The thesis deals with the current state of tractor gearboxes. The first part introduces the history of tractors. Furthermore, the concept of powertrain and the distribution of tractor transmissions are explained, followed by a structure description of each of them. Beyond that, the principle of the gearbox function is described as well as its use and for better understanding most of the explanations are complemented with images. The next part deals with comparing the different power classes of tractors in terms of transmissions, speeds and specific fuel consumption. All aspects and results are summarized in conclusion.
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Porovnání emisních norem výfukových plynů u vybrané skupiny traktorů
OPEKAR, Jiří
The aim in this thesis is to provide a comparison of smoke levels among John Deere 6 Family four-cylinder tractors. The comparison group consisted of 5 tractors, each with a different year of production. The aim is to ascertain if the systems provided in new John Deere tractors show higher efficiency in reducing emissions than those in older tractors. Further, the thesis deals with particular substances emitted by compression ignition engines and their influence on humans and the environment. Furthermore, basic information is provided about European and US standards as well as ways to reduce to the minimum these harmful substance emissions from compression ignition engines to the atmosphere. Diagnostic instruments for measuring exhaust gas emissions from compression ignition engines are described. Further, the thesis contains characteristics of tractors in the study group and results of measurements, arranged in tables and in graphs. Lastly, the results are evaluated and conclusions are made for practice.
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Hodnocení sklízecí mlátičky JOHN DEERE S 680 s pásovým podvozkem při sklizni obilovin, řepky olejné a kukuřice
PILÁT, Jiří
The content of this thesis is evaluation of the JOHN DEERE S 680 combine harvester with tracked chassis, during harvesting grains, rape and maize. The theoretical part of my thesis is at first focused on the basic structural design of the combine harvester. In the second part it describes harvesting of maize using a combine harvester, mainly from the technological point of view. The practical part first describes the methodology, where are listed procedures and calculations required for the evaluation of a combine harvester. Furthermore, it contains the final evaluation of the quality of work of the combine harvester in terms of loss, throughput, the quality of crushing and dispersion of crop residues, fuel consumption, performance analysis, as well as the influence of tracked chassis on the performance of the combine harvester.
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Sledování a vyhodnocení rozhodujících provozně ekonomických parametrů vybrané skupiny traktorů s vysokým výkonem motoru
PROKOP, Tomáš
The purpose of this thesis is monitoring and evaluation of critical operational and economic indicators in a statistically significant group of tractors of a higher power class, with a power exceeding 90 kW of engine performance. These tractors are for agricultural entreprises one of the most important vehicles. I daresay they are most commonly used for a wide variety of all the necessary agricultural work on farms. Whether it is the transportation of agricultural commodities or the toughest work on fields such as plowing. Tractors with these performances ale very complicated machines in which failure may occur. However, failure occurence may not be seen on all machines in the same way and progression. Future development of costs is hard to predict. Out of operational and economic indicators, costs of repairs and maintenance of the tractors were included in this work which I have received from invoices, financial statements and results of each agricultural company. Costs were observed with respect to the operation time of these tractors for a period of five years from the commissioning.
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B2B marketing communication of John Deere
Szabó, Attila ; Zeman, Jiří (advisor) ; Filipová, Alena (referee)
The aim of this master's thesis is to evaluate the implementation of the B2B marketing strategy of John Deere on a specific example. The theoretical part of the thesis focuses on defining the basics of modern marketing communications. Next it deals with defining the concept of B2B marketing and related strategies. The practical part focuses on the characterisation of the agricultural machinery industry and the slovak agricultural sector. Further it includes the introduction of other B2B marketing tools of John Deere in practice.
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