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Design of suspension for an electric off-road motorcycle
Hlaváč, Pavel ; Hejtmánek, Petr (referee) ; Míša, Jiří (advisor)
This master thesis deals with the design of suspension for an electric off-road motorcycle. The aim is to determine the optimum damping force and spring stiffnesses for a motorcycle with given parameters for different rider weights. Some input parameters had to be measured, such as tire stiffness and damping, fork and shock damping of the same type of motorcycle. Other damping forces were created using the measured ones to cover wider range of damping ratios. Then these forces and spring stiffnesses were tested in quarter car and half car models to evaluate the changes in suspension setting on rider comfort a ride safety. Then the ideal damping forces and spring stiffnesses for an electric off-road motorcycle are determined from the simulations performed.
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Testing of Vehicle Suspension Components
Šidla, František ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This bachelor thesis deals with issues related to testing car chassis components during development. Automobile transport is the most common type of long-distance transport. That's why vehicles are constantly evolving to provide the best possible performance. Increasing demands on consumers are being placed on vehicles because of the introduction of modern technologies. New technologies and concepts need to be thoroughly tested that they can be properly integrated into existing models. Test devices for determining the characteristics of the chassis are generally described here using specific examples of individual machines. Subsequently, the work clarifies the testing of the service life of individual parts of the chassis. The last part is devoted to the conceptual design of a simplified hydraulic device for testing coil springs. From the calculated characteristics, a hydraulic actuator and pump are selected from the relevant catalogues. In conclusion, the importance of car testing in development is summarized, individual types of testing are described and the readiness of test devices for the future is indicated.
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Group R Rally Cars
Černý, Filip ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
In this bachelor’s thesis is elaborated a technical overview of the new car racing group R. This group is primarily designed for rally racing competition, organized by the FIA. It describes vehicles dividing into different groups, their structural design and safety features. Finally is shortly outlined possible future development of these racing cars.
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Conversion of Car Front Suspension
Chaura, Václav ; Porteš, Petr (referee) ; Hejtmánek, Petr (advisor)
This diploma thesis is focused on the design of the conversion of the car front suspension for racing purpose. Existing suspension solution is described by analyse static and kinematic quantities. Furthermore, a change of suspension is proposed to improve the driving characteristics of the vehicle, where the kinematic, dynamic and strength analysis of the newly designed suspension is performed. The conclusion summarizes the comparison of the original and the new suspension design.
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Kinematics analysis of race car suspension
Jurka, Adam ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This bachelor thesis is aimed on kinematic analysis of the race car suspension. In the first part of the thesis geometry parameters of suspension and their influence on driving behavior are explained. Additionally measuring methods of suspension geometry and their use in real life applications are described. Then kinematic points of the race car Peugeot 208 R2 are found and measured using 3D optical method. For better evaluation of measured data virtual model of each axle is created in Adams Car simulation software. After that kinematic analysis is performed. This analysis describes change of parameters in car suspension depending on wheel trajectory. As a conclusion results of the analysis are discussed. Moreover new methodology for better and more precise evaluation of car suspension analysis is introduced and described.
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Design of Formula Student Front Axle Adjustable Stabilizer
Ševčík, Jan ; Hejtmánek, Petr (referee) ; Porteš, Petr (advisor)
Diploma thesis focuses to design anti roll-bar for Formula Student car Dragon II build in FME. This work follows the proposal anti roll-bar car Dragon I of Jan Krasula. Task of this work is analyses last design, introduce more effective method treatment, create own design with parameters which will be better then last design. An integral part design is prepare manufacture documentation which will be base for manufacture of this komponent
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Class Super 2000 Rally Cars
Ratiborský, Pavel ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This bachelor’s thesis is divided into three points. The first section is divided into the basic design elements of the Super 2000 cars and briefly describes their function. In the second section is a call for representatives of this class, described the design and comparison with a standard car. The last point is outlined the possible future development.
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Formula SAE Technical Solutions in Countries Except USA
Bittner, Ivo ; Porteš, Petr (referee) ; Ramík, Pavel (advisor)
Formula SAE Technical Solutions except in Countries Except USA. Bachelor's work of bachelor's studies of 3rd year. Academic year 2008/2009, study group 3B/31. Brno university of Technology, Faculty of mechanical engineering (BUT FME), institute of automotive and traffic engineering, department of Transportation and Manipulation device. November 2008. This project which has been elaborated in frame of bachelor’s studies department of Automotive engineering is submitting the project of Technical sollutions Formule Student in the country except for USA. Filling work is elaborate summary of most important technical recipes and contextual technical solution contemporary competition vehicles, show in accessible example solution important constructional part, express to possibilities usage engineering admission on vehicle development, including measurement and testing, prepare accessible summary of constructional solving distinguished racing teams
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The Axles of SxS Vehicles
Štolpa, Radek ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
The diploma thesis deals primarily with the topic of the kinematics of the wheel suspension that has a significant effect on the dynamics of the whole vehicle. The thesis gives a general overview of kinematic characteristics and their impact on driving characteristics. It deals with load transfers that occur due to lateral and longitudinal accelerations. The thesis analyses the axles of the SxS vehicle, which has wheel strokes up to 600 mm. The axles have high requirements for changes in kinematic characteristics. The thesis provides an overview of the used axles and then compares them with the original ones. The thesis contains its design of axles with the procedure and evaluation of differences compared to the other axles specified by the boundary conditions. An algorithm using analytical geometry was also created where instant centre positions, roll centres and anti-characteristics for the static position of the vehicle can be calculated. In conclusion, it contains a sensitivity analysis, which aims to acquaint with the effects of kinematic connections of double wishbone suspensions on the kinematic characteristics.
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Motorcycle Springing and Damping System
Filka, Tomáš ; Vančura, Jan (referee) ; Blaťák, Ondřej (advisor)
This thesis consists of theoretical overview about motorcycle chassis and suspension systems as well as information about springs and dampers. It is also focused on practical usage of multibody simulation for motorcycle suspension testing which leads to the development of series of virtual riding tests built within MSC Adams View software environment. Then the results are further discussed together with suggestions for future improvement of this model.
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