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Braking retarders for heavy commercial vehicles
Breckl, Lukáš ; Hejtmánek, Petr (referee) ; Fojtášek, Jan (advisor)
This thesis deals with the issue of retarders for trucks and buses. It concentrates on the fundamentals of their function and their construction. The thesis is divided into five main chapters. The first chapter describes braking power necessary to slow down the vehicle. The second chapter focuses on the main characteristics of retarders. The third chapter contains a description of their basic types. The fourth chapter compares these separate types. The concluding chapter of this thesis is dedicated to development trends. The thesis has a research character and does not contain new construction proposals.
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Reduction of Valvetrain Mechanical Losses
Kučera, Pavel ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The topic of this thesis is the mechanical losses in the valvetrain. The purpose is to describe the creation of individual losses and their possible reduction. The main factor of creation of losses is friction. The result of this thesis is to highlight the possible methods to reduce friction and other influences acting on the valvetrain. The main benefit is description various types of surface and design modifications of valvetrains, which are already used or are in development.
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Measuring of deceleration of heavy goods vehicles (greater than 12 tonnes) when slowing down using the motor
Süttő, Daniel ; Haring, Andrej (referee) ; Bradáč, Albert (advisor)
This thesis is dealing with measuring the deceleration of lorries when they are braked by the engine. The weight of the vehicles given is bigger than 12 tons. The thesis can be divided into theoretical and practical part. In the theoretical part there are special presumptions to manage the given problem successfully. The stress is on the construction of lorries and on driving resistances which influence the process of deceleration a lot. The thesis also analyses the technical solution of each possibilities of braking and also the function of the gearbox. In the practical part the method of measuring is described. The measurement devices are also given through which the measurements were realized. The main part of this work is made by measured values of each lorries and the interpretation of measured values itself. The final evaluation of measured data are mentioned at the end of the thesis.
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Measuring of deceleration of heavy goods vehicles (greater than 12 tonnes) when slowing down using the motor
Süttő, Daniel ; Haring, Andrej (referee) ; Bradáč, Albert (advisor)
This thesis is dealing with measuring the deceleration of lorries when they are braked by the engine. The weight of the vehicles given is bigger than 12 tons. The thesis can be divided into theoretical and practical part. In the theoretical part there are special presumptions to manage the given problem successfully. The stress is on the construction of lorries and on driving resistances which influence the process of deceleration a lot. The thesis also analyses the technical solution of each possibilities of braking and also the function of the gearbox. In the practical part the method of measuring is described. The measurement devices are also given through which the measurements were realized. The main part of this work is made by measured values of each lorries and the interpretation of measured values itself. The final evaluation of measured data are mentioned at the end of the thesis.
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Braking retarders for heavy commercial vehicles
Breckl, Lukáš ; Hejtmánek, Petr (referee) ; Fojtášek, Jan (advisor)
This thesis deals with the issue of retarders for trucks and buses. It concentrates on the fundamentals of their function and their construction. The thesis is divided into five main chapters. The first chapter describes braking power necessary to slow down the vehicle. The second chapter focuses on the main characteristics of retarders. The third chapter contains a description of their basic types. The fourth chapter compares these separate types. The concluding chapter of this thesis is dedicated to development trends. The thesis has a research character and does not contain new construction proposals.
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Reduction of Valvetrain Mechanical Losses
Kučera, Pavel ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The topic of this thesis is the mechanical losses in the valvetrain. The purpose is to describe the creation of individual losses and their possible reduction. The main factor of creation of losses is friction. The result of this thesis is to highlight the possible methods to reduce friction and other influences acting on the valvetrain. The main benefit is description various types of surface and design modifications of valvetrains, which are already used or are in development.
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