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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 the Deceleration of Motorcycles with the Use of Engine Braking
Vašica, Radoslav ; Semela, Marek (referee) ; Bradáč, Albert (advisor)
Diploma thesis deals with the deceleration of the motorcycles with the use of engine braking. Work can by divided into theoretical and practical part. The theoretical part begins with the possibility of division motorcycles according to several criteria. Below is given the primary papers of literature, usable in connection with the issue of this work. Subsequently, the work discusses the factors which are affecting the course of the deceleration with the use of engine braking. The practical part acquaints the reader with available measuring devices, with the place of measurement and the methodology. The following are listed specific measured values for individual motorcycles, supplemented with graphical output. At the end of the practical part is for comparison a brief summary of the measured values of each tested vehicle. Interpretation and evaluation of the measured data are contained in the conclusion of the work.
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Hydrostatic drive of multi-purpose loader DAPPER
Vydra, Tomáš ; Merenda, Lukáš (referee) ; Škopán, Miroslav (advisor)
This thesis deals with design of hydrostatic drive for multipurpose loader and tool carrier DAPPER. At the beginning is research of different basic concepts and modern solutions to the problem, aided by a detailed description of competitive machine in the same performance category. Extensive comparison with other producers is included in the annexes to this thesis. Furthermore, a theoretical driving characteristic and its appropriateness is examined further on the basis of two model situations. The calculations of the individual components of the hydraulic circuit precedes drive kinematics analysis of articulated machine frame, on it final conception of hydrostatic drive is chosen. Firstly hydromotors and hydogenerator are chosen on the grounds of calculations then hydraulic hoses, filters and flow divider. Next chapters are aimed to calculations of hydraulic losses and thermal calculation of hydraulic circuit. Final part deals with introduction the final characteristics of drive. The practical parts of the work are assembly drawings with main power components and hydraulic schematic of drive.
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The engine unit of a loader
Vaněk, David ; Škopán, Miroslav (referee) ; Kašpárek, Jaroslav (advisor)
This paper deals with a design of wheel loader’s engine unit and its performance, as well as the choice of suitable unit itself. Theoretical part describes a standard approach used in designing loaders in the performance and weight class according to the parameters listed and also introduces common designs of loader’s individual parts. It gives the reader an overview of various machines currently available on today’s market and their comparison. The second part of the thesis consists of performance design and calculations based on the comparison of performances needed for various working modes of the machine, where the performance are calculated as a sum of partial performances of differents parts of machines. The result of this paper is a choice of motorized unit that suits all the designed and calculated parameters.
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