SCIDAR - A Digital Archive of the University of Kragujevac

The gaseous fuels are very convenient from the economic aspect as well as from the ecology aspect. Fuel stratification allows the engine work with the globally lean mixture and in this way increase the engine efficiency and reduces the pump losses. The separation of the engine working space, on the area where the mixture will be always rich, and on the area where the mixture will be always lean, allows the spark ignition engine work with the globally lean mixture. In the paper it was investig...

A vehicle represents a set of different parts and systems that can adversely affect the environment by its wear. The wear effects are reflected in the formation of suspended particles with different diameters. Suspended particles can significantly affect human health, knowing that people can inhale them. The aim of this paper is to identify, based on available literature and own research, the most influential systems and elements on the vehicle that are the source of particles (Particulate m...

Vehicle represents the part of people everyday life. However, because massive usage of IC engines, as the drive train, for which adequate replacement it was not found till today, have caused prognoses about oil disappearing. This have produced necessity to find some alternative, or more accurate other fuel for usage. One of the ways for fuel consumption reducing is application of dual fuel engines, where one part of fossil fuel will be replaced with some alternative fuel. In this paper, numer...

Continuous variable transmission or more commonly known as CVTs are increasingly used on different vehicle categories. This kind of gearbox has evolved to the present, which allows the torque transfer without loss during transmission from the engine to the drive wheels. The aim of this paper is to demonstrate the benefits of applying such a gearbox and at the same time the positive effects that the vehicle delivers in terms of vehicle performance. Using the CVT on the vehicle as a transmissio...

The hydrogen is known as promising fuel in the future. The main advantage of the hydrogen is chemical composition which is responsible for low emission of carbon components. In the paper experimental work with hydrogen is presented, which was performed on a test engine specially modified for work with gaseous fuels. The injection and ignition parameters providing regular engine work are shown, at presented regime. The engine work was achieved with lean mixture, in order to reduce the combusti...

Vibrations are a part of everyday life. In mechanical engineering, vibrations are considered an undesirable phenomenon that may have harmful effects on the machine structure. Due to the large number of moving parts and the speed of their movement, the IC engines especially tend to create vibrations. Based on numerous studies, it has been found that vibration measurement can provide a good insight into the state of the engine. An experiment was performed with simultaneous recording of the pres...

Brakes are the most important pieces of safety equipment on vehicles today. Braking is an exciting area for development within the automotive industry with a number of technologies competing to improve safety and overall efficiency. The braking system should provide a high degree of reliability and durability under the normal exploitation conditions, as well as in extreme conditions. The process of stopping a vehicle or reducing its speed is based on the kinetic energy reduction process, foll...

Technical inspection of the vehicle represents activities for the purpose of determining and assessing the technical condition of the vehicle, as well as compliance with the minimum technical regulations that are legally prescribed. One of the most important systems on the vehicle is the braking system. Without this system, it is not possible to stop the vehicle in a timely manner and therefore there is a danger of accident occurrence. In order not to have a previously dangerous situation, te...

This paper presents 3D-printed micro-porous structures made of a Cu/PLA composite by using material extrusion 3D printing technology. A metallic filament made of 80% copper and 20% polylactic acid (PLA) was used for the 3D printing of the porous samples. We varied printing parameters, aiming to obtain a micro-range porosity that can serve as a water-filtering structure. The produced samples were analyzed from the aspects of dimensional accuracy, level of porosity, and capacity for water ...