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Design of Vehicle Steering
Barančoková, Zoja ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor thesis primarily deals with the design of vehicle steering, as it forms one of the most important elements of the overall vehicle. The steering must meet certain safety requirements and nowadays, the driver’s driving comfort is already seen as an essential part of it. This work contains the basic kinematic settings and a summary of the individual constructional components together with their functions. To ensure the correct control of the vehicle on the road, the correct setting of the dynamic part of the steering is also necessary. Bearing in mind the electronic equipment of the vehicle that made its way into spotlight, the thesis also explains principles of the systems operations that every modern vehicle already contains. Finally, the types of gearboxes and power steering which this year’s passenger and commercial vehicles are equipped with are summarized. Based on the acquired knowledge, a prediction of the future development of the vehicle driving is presented.
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Motorcycle rotary engine
Novotný, Petr ; Rozsíval, Jan (referee) ; Zháňal, Lubor (advisor)
Diploma thesis is focused on conceptual design of Wankel rotary engine with performance between 30-60 kW. Performance of designed engine is determined to 35 kW and volume of one chamber amounts to 245,58 cm^3. In this thesis are step by step calculated geometrical properties of each design group which are afterwards put into 3D data. There is also solved cooling system of designed engine and design of geometrical and characteristic properties of parts of cooling system. Last but, not least there is solved placement of designed engine into frame of motorcycle. As suitable motorcycle has been chosen Honda CBR125R because it has very advantageous layout of frame.
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Children Terrain Electric Vehicle
Sedlář, Martin ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
The master’s thesis is focused on a conceptual design of a children terrain vehicle with electric drive. At the first part there are described children terrain vehicles rules, electric drives, regulations for a frame test and types of suspension. Then a suitable electric engine, an accumulator and other important parts of the vehicle are chosen. The following part describes the frame construction and its stress-strain analysis using Finite element method. The last part of thesis describes the suspension construction and front suspension kinematics solved in a multibody software. The result of thesis is a vehicle conceptual design created in CAD software Creo, supported by results of the stress-strain and kinematic analysis.
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The utilization of reverse engineering in computation of vehicle aerodynamics
Rozsíval, Jan ; Forman, Matěj (referee) ; Porteš, Petr (advisor)
The vehicle body was measured by using ATOS 3D scanner. Measured data from the ATOS 3D scanner were applied to make a 3D model of vehicle body and to make a 3D model of whole vehicle by using computer program Pro/ENGINEER. The model of vehicle was made with a view for future use of CAD model. Surface of the vehicle model was used for computation of vehicle aerodynamics – aerodynamic static pressure distribution by using CFD software Star-CCM+.
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Driving safety systems
Rektořík, Jiří ; Rozsíval, Jan (referee) ; Suchý, Jan (advisor)
Bachelor thesis is focused on the description and measurement of characteristic variables that affects driving comfort. Driving comfort is closely related to driving safety. This thesis deals with measured quantities but also deals with comfort in the cab and optimally adjusting elements in the cab.
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Design of Device for Tyre Parameters Measurement
Pacut, Patrik ; Rozsíval, Jan (referee) ; Hejtmánek, Petr (advisor)
The aim of this thesis is a method selection and design of measuring device for experimental identification of directional tire characteristics for passenger cars. The first part analyse directional characteristic and method of measurement. The next part focuses on the design of the measuring trailer and selecting measuring equipment with description.
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Vehicle Passive Safety Systems
Jelínek, Adam ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor’s thesis of research nature deals with detailed description of passive safety features in modern cars and with characterization of these features in relation to electric and autonomous cars. Detailed structural and material description of car’s crumple zones and safety cage with description of car’s restraint systems is supplemented with historic background on development of these features. Final part of thesis gives reader an idea of application and necessary changes of these features when used on electric or autonomous cars.
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Possibilities of simulation modeling of traffic accidents with reduced visibility
Rozsíval, Jan ; Motl, Jakub (referee) ; Bradáč, Albert (advisor)
The diploma thesis deals with the possibilities of simulation modeling with reduced visibility in the Virtual CRASH program, which as the only available programs allows work both with the help of mathematical models to simulate vehicle movement and change parameters to simulate reduced visibility, lighting, etc. The theoretical part contains a description of photometric quantities, deals with the human eye and its ability to see under reduced visibility, a description of the luxmeter meter and luminance analyzers. Here are four main reasons for reduced visibility and their description. It contains a sample of the most used programs used to deal with traffic accidents. The four types of headlights most commonly used in today's vehicles are listed and described. In the experimental part, two measurements were performed. The first measurement to obtain input values to obtain a black and white texture determining the shape of the light rays emanating from the vehicle headlights. The second experiment to obtain the contrasts of the white box, black box and pedestrian for subsequent comparison with the output of the Virtual CRASH program.
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Aerodynamic design of heavy commercial vehicles
Šuľak, Andrej ; Rozsíval, Jan (referee) ; Fojtášek, Jan (advisor)
This bachelor's thesis deals with the currently available aerodynamic drag reduction devices for articulated and drawbar trucks. The main goal is to reveal the given topic to the reader, beginning with some basic information about aerodynamics and then explaining how these drag reduction devices work. They often provide additional benefits apart from improving aerodynamic efficiency.
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