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Modelování parametrů spalovacích motorů
Dobrovolný, Milan
Master thesis deals with the link between the internal and external parameters of the combustion engine. Its point is not to exactly define this links but only check if this links exist and what is their character. First part of the thesis is dedicated to present state of the mixture preparation systems of the petrol engines. Here are described the ways of the lambda regulation and its effect of the specific fuel consumption. Further are described types of injection systems and at the end is described the way for the determination of the ignition advance. Second part is focused on the chosen mathematics-statistics methods which are interesting and useful for the solving this problem. Last part is paid to the verification of the existence the links of the operating parameters and attempt of their definition in numeric way using the Maple software and chosen mathematics-statistics methods.
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Engine Motormanagement Software
Kuda, Roman ; Kuchyňková, Hana (referee) ; Hájek, Vítězslav (advisor)
Increasing requirements and claims on running of motor vehicles contributed to development of new systems on the mixture preparations of fuel and ignition. Cardinal causes, which led to the very intensive research and later introduction of superior systems of injection and ignition, where fulfilment of stricter emission limits, lower fuel consumption at prezent engine-power increase and engine torque. The conception of the classical gas-engine was not changed over the past few years. The supervising elements as ignition and injestions of engines are continuously changed.
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Fuel Injection Analysis
Schnabl, Jan ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
The ignition and injection system in any form are an integral part of each car. The development of these systems goes hand in hand with the development of the automobile and his growing industry. Since the nineteenth century to the present occurred in this sector signifcant progress. This thesis is focused primarily on the description of the two systems and their partiton. The development has been recorded from the oldest systems to the newest systems.
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Engine Motormanagement Software
Kopecký, Ivo ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
Fuel injection is a means of metering fuel into an internal combustion engine. In modern automotive applications, fuel metering is one of several functions performed by an "engine management system". A fuel injection system is designed and calibrated specifically for the type(s) of fuel it will handle: gasoline (petrol), Autogas LPG (also known as propane), ethanol, methanol, methane (natural gas), hydrogen or diesel. The majority of fuel injection systems are for gasoline or diesel applications. With the advent of electronic fuel injection, the diesel and gasoline hardware has become quite similar. During the last twenty years a preparation of a fuel mixture and the way of ignition in engine segment have changed the most. Instead of a carburettor it is being used the unit, which prepare fuel mixture according to a status of a car on the road e.g. change of pressure, temperature or ratio of a fuel and air.
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Aditional modification of Subaru test engine ignition advance
Gášek, Martin ; Mazůrek, Ivan (referee) ; Strecker, Zbyněk (advisor)
This bachelor’s thesis deals with design and application of an additional vari-able ignition advance for Subaru Robin EH34 engine connected with an experimental station TecQuipment TD301. At the beginning, a basic theory for the ignition advan-ce is given. Then a way how to measure an ignition point and engine characteristics is described. Manufacturing and assembly of the mechanism is covered. In the end a comparison of p-V and p- diagrams for various ignition settings is done. Influence of power output is discussed.
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Capacitive Ignition System
Benček, Kristián ; Bazala, Jiří (referee) ; Beran, Martin (advisor)
Bachelor thesis deals with the complex issue of ignition system, with a special emphasis put on the capacitive ignition. Due to the later needs the knowledge of the principles, on the basis of which the individual internal combustion piston engines work is the beginning of a work dedicated to the just distribution of these engines according to the basic criteria and elementary define different types of piston internal combustion engines and storylines, which in them take place. Subsequently is described in detail dismantled the issue of the kindle system as a whole but also the individual components of the ignition system and attention is required even to properly set the most suitable moment of ignition (pre-ignition) and the need to ensure sufficient ignition energy. Ignition systems are divided according to the historical development from the earliest induction of the classical ignition until after the state of the art fully electronic ignition system. The greatest emphasis is put on detailed analysis of the capacitive ignition, which is then compared with the conventional ignition. The last part is devoted to the management of the combustion event using the initialization of the burning. As an example, that the management of the combustion event using the initialization of the burning is nowadays a real, is referred to the engine Skyactive X, which should be in 2019, the commonly commercially used in the model of the Mazda 3.
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Programmable ignition system for spark-ignition engine
Friedel, Daniel ; Kubíček, Michal (referee) ; Tošovský, Petr (advisor)
This thesis is concerned with design of programmable capacitive ignition, powered from board grid. Universality of the system, especially possibility to change values of timing of early spark via changes of programme in microcontroller was taken as major goal. Microcontroller is used as the operative element of ignition. Commonly used methods for sensing of engine speed and managing of ignition are defined and explained at the begining of the thesis. Also is presented realisation of hardware and software part and draw up the methodology calibration of the speed sensor. The ignition is designed to avoid the need to intervene in the high voltage ignition system.
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Engine Motormanagement Software
Huška, Lukáš ; Kuchyňková, Hana (referee) ; Hájek, Vítězslav (advisor)
This master thesis deals with ignition systems which are used in cars vehicles with gas engines and also with setting of the best moment of ignition of gasoline-air mixture in cylinders of engine. Ways of gas injection at diesel engines and their control systems are also described in this thesis. Next chapter deals with control unit and describes main actions which are necessary for today’s motor vehicles. As illustration is used example of succession of actions which are necessary for calculation and setting regular value of pre-ignition. At the end is shown animation, which can be used for practice lessons in a subject Automobile Electric and Electronic Systems as a example. It will simplify understanding of described activities which are all accomplished by central control unit. For purposes of laboratory lessons is in this thesis also discussed measuring of engine performance with changes of parameter of central control unit.
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