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Draft measures to reduce customer complaints
Charvátová, Petra ; Strnad, Vlastimil (referee) ; Tyráček,, Petr (advisor)
This diploma thesis deals with customer complaints of headlamps in Automotive Lighting s.r.o. The goal is to analyze the state of customer complaints for 2018 and to evaluate the biggest source of nonconformities in terms of the type of complaint based on Pareto analysis. The thesis focuses on solution of one particular type of complaint. The key part of the thesis is also the processing of the process analysis, the evaluation of the causes of the complaint and the draft of corrective measures that would eliminate the problem. The conclusion of the thesis contains evaluation of the proposed corrective measures, including from the economic point of view.
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Verification Tightness of Headlamp
Maule, Jiří ; Pernikář, Jiří (referee) ; Osička, Karel (advisor)
The task of my work is to describe and analyse tightness control of front headlights in automotive industry. This work is concerned with theoretical indi-cative allocation according to the light source, development and contruction of headlights in preamble. There is shown the way of disclosing the outflow pres-sure area at loose headlight in next part of this work. It defines the most proba-bly caused reason of untightness with help of Ishikawov diagram. There is also made evaluation of measured values and determined the main cause of un-tightness. At the end there are shown possibilities of statistic´s evaluation of measured values and made changes necesarry for untightness elimination.
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Technological analysis of the usability of new thermosetting materials for the construction of headlamps
Rašner, Martin ; Kolář, Michal (referee) ; Píška, Miroslav (advisor)
The diploma thesis presents the usability of a new thermosetting material BMC for the construction of a car headlight. In the theoretical part there are described headlights, basic characteristics and properties of plastics focussing on polymer composite materials and material testing. The practical part deals with the processing of test samples for mechanical testing by compression moulding and also with the production of real samples of reflectors and carrier frames by injection moulding. The evaluation is based on comparison of the results of the performed tests of alternative material and the currently used BMC TETRADUR TD 492/2 in HELLA Autotechnik Nova s.r.o. Basic physical-mechanical properties such as strength, stiffness, toughness and hardness are tested and monitored. The reflectors and carrier frames are assembled into the headlight and then tested according to legal and customers´ requirements for climate and vibration resistance and photometry.
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Influence of the different light sources of the vehicle headlights on the perception of an obstacle by the driver of the vehicle
Sklenář, Michal ; Bradáč, Albert (referee) ; Motl, Jakub (advisor)
This thesis focuses on examining the influence of various light sources (halogen, xenon, LED) of vehicle headlights (Škoda Octavia III. generation) on the perception of pedestrians by the driver of the vehicle. The theoretical part contains the concepts essential for a general understanding of the main topic of this thesis. The aim of the thesis is to present how the brightness and contrast between the pedestrian and his surroundings changes when illuminated by one of these light sources due to the increasing distance between the pedestrian and the vehicle and the different type of pedestrian clothing. The results of the measured experiment are presented using charts, photo documentation and brightness maps. These are then compared with the results obtained by measuring the distance of pedestrian perception by individual probands. The conclusions applicable to forensic engineering practice are drawn from the compared values.
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Heat transfer in modern automotive lights
Holec, Radek ; Klimeš, Lubomír (referee) ; Štětina, Josef (advisor)
The beginning of this thesis is dedicated to light in general and all different types of vehicle lightning, also deals with various types of light sources and specifically about LED where it describes the temperature change behaviour. Second part deals with heat transfer by conduction, convection, and radiation, it describes quantities and relationships needed for next capitols. In the penultimate part is described thermal management of headlights, therefore different options of cooling and causes of heat generation, and different types of PCBs that are used in automotive. In the last part is proposed the heatsink, which should be used for cooling LED chips of daytime running lights.
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Comparison of Light Parameters of Different Light Sources of Vehicles' Headlamps
Suchomel, Filip ; Motl, Jakub (referee) ; Bradáč, Albert (advisor)
This thesis is focused on comparison of parameters of light sources (halogen, xenon, LED) installed in Skoda Octavia 3rd generation. The opening part solves analysis of the current state of lighting technology and its impact on traffic safety. The next part is focused on general parameters of light, construction of light sources, optical systems and adaptation of the human eye to various light conditions, especially contrast. The practical part is focused on comparing the contrast values of individual light sources in relation to the dark and lightly dressed pedestrian in the area without artificial lighting.
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The Lighting Equipment Used in Modern Vehicles and the Measurement of the Range of Visibility of the Rear Lights
Belák, Michal ; Kropáč, František (referee) ; Vémola, Aleš (advisor)
This work is about lighting equipment of modern vehicles, its historical development, present condition and possibilities of its further progress and measuring of the range of visibility of the rear lights. First part is aimed at lighting equipment used in modern vehicles as a whole. It describes sources of light, their principle, construction, advantages and disadvantages. Next it deals with searchlights and other lighting devices, their gradual development, construction and modern solutions which are used in them, and also their future development. Second part of the work is aimed at characterization of ways of measuring the range of visibility used in practice, their possible application to measuring of the range of visibility of the rear lights and on proposal of presentive methodics for this measurement. Realization and interpretation of practical measurement by this methodics is included.
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Optimization of the Production Process by World Class Manufacturing
Hejsková, Veronika ; Radek, Nahodil (referee) ; Juřica, Pavel (advisor)
This thesis deals with the optimization of the process in the company Automotive Lighting sro, manufactures lamps for automobiles, in Jihlava. Explain the basic concepts and terms according to World Class Manufacturing System and the reader is familiar with the problems of production in the company. Subsequently analyzes and evaluates the current situation with the production elements of WCM. The conclusion is a summary of suggestions to improve the factors affecting the production system, which should ensure an improvement in production efficiency in the company.
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Design of manufacturing technology for headlamp body
Pytlík, Radek ; Tomaj, Martin (referee) ; Kandus, Bohumil (advisor)
The project developed within the Master's degree is proposing a technology of manufacturing a headlight housing from the high temperature polycarbonate Apec 1695 with wall thickness of 1.8 mm. The batch size is set at 100,000 units / year. Based on literature studies of injection moulding and also on the calculation method, the injection moulding tool with the heated injector has been proposed. The injection moulding machine Allrounder 630 S 2500-800 from Arburg is used for the production of the plastic headlight housing.
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