International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

It is very important to know the trends related to the structure and condition of the vehicle fleet, to be able to predict the structure of the vehicle fleet in the future. In Montenegro, it is noticed that there is a constant increase in the number of battery electric vehicles (BEVs). The share of BEVs in the vehicle fleet of Montenegro is too small to have any significant impact on CO2 emissions as well as the power system. The pandemic COVID-19 virus had a great impact on the number of registered as well as the number of newly registered vehicles. Practically, in 2020, the year of the pandemic, only an increase in the number of BEVs was recorded. It is very worrying that the number of vehicles using diesel fuel is increasing, which can be a complicating factor in efforts to reduce the negative impact of road traffic on the environment.

One of the biggest challenges in the FSAE competition is adapting the power unit to the strict regulations of the competition. The task of the exhaust manifold is to enable the best possible flow of exhaust gases from the engine to the environment. A properly designed vehicle exhaust manifold is of great importance for enabling better performance of the power unit. There are several different concepts for designing exhaust manifolds. Each concept has its advantages and disadvantages. One of the main guidelines when designing the exhaust manifold is to enable air flow with as little local resistance as possible so that the exhaust gases are released into the environment as soon as possible. In this work, a 3D model of three types of exhaust manifolds was created, and then a CFD simulation of airflow through exhaust manifolds was performed using ANSYS Fluent software. CFD simulations help to a great extent with a better design of the exhaust manifold.

In this paper, a simulation of their flow through the throttle valve on the Formula Student vehicle was performed throttle valve is an element that, according to the regulations of the Formula Student competition, must be present in the intake installation of the vehicle’s power unit if it is a competition in class IC. The correct design of the throttle is of great importance anchor or the power unit to work properly, but also to extract the maximum performance of the power unit itself, and thus of the competition vehicle as a whole. One of the main tasks of the throttle is to allow air to flow with as little resistance to flow as possible. For the CFD simulation in this work, ANSYS Fluent was used, which proved to be a very powerful tool in the CFD simulation of the throttle body.

Formula Student is a student engineering competition. Students all over the world compete to build a racing vehicle. One of the main elements of this vehicle is the vehicle chassis. The chassis is one of the most important elements from the aspect of driver safety. There are different chassis design concepts. The two most common are the monocoque chassis and the tubular chassis. In this paper, a detailed structural analysis of the tubular chassis of the Formula Student vehicle was performed using the software. The chassis model was created in the CATIA software, and then the structural analysis was done in the ANSYS software. By applying modern software, it is possible to better understand the problems during construction, and significant financial and time savings can be made. ANSYS software can also be of great help in chassis optimization.

The FSAE competition is a student engineering competition that involves designing, constructing, and building a small racing car. Students from different universities compete on auto-moto sports tracks. The competition’s judges are eminent experts in marketing, automotive engineering, and racing car engineering. In class IC, engines are used as power units. One of the main limitations is that all intake air must pass through a diameter of 20 mm. One of the main challenges facing student competitors is solving this problem, and the convergent-divergent jet is one of the possible solutions to the problem. In this paper, CFD simulations were used to examine the influence of the divergent part of the restrictor on the total mass flow at the nozzle exit. A diagram of the dependence of the mass flow on the half-angle of the divergent part was obtained. For the CFD simulation, ANSYS Fluent was used, which proved to be very good for examining the mentioned influence.

The Formula Student competition is the most challenging, complex, and attractive student engineering competition in the world. Students from universities around the world compete to build better vehicles. The competition consists of several different disciplines, which are divided into two groups. The first group consists of static disciplines, where students who are members of the team defend the vehicle project in front of eminent experts from the world of the automotive industry and auto-moto sports. The second group is the group of dynamic disciplines, which is made up of several disciplines related to the analysis of vehicle behavior in real conditions. One of the main challenges facing the team members is designing the vehicle’s propulsion system. At competitions in the IC engine class, power units from a certain class of motorcycles are most often used. The main limitation related to the power unit is that all intake air must pass through a 20 mm diameter. One of the solutions to the mentioned problem is the use of a convergent-divergent nozzle with a throat diameter of 20 mm. In this paper, the influence of the convergent part of the nozzle on the airflow through the nozzle itself was examined. Models were created for several restrictors and they were tested by CFD simulation in ANSYS Fluent software

The subject of research in this paper is the kinematic analysis of the slider-crank mechanism of an internal combustion (IC) engine. The piston, connecting rod and crankshaft are the most important moving parts of an IC engine. The performance of IC engines largely depends on the design of the mentioned parts. Special attention should be paid to the kinematic analysis of the slider-crank mechanism, when constructing IC engines. Properly performed kinematic analysis is a prerequisite for the design of an efficient IC engine. Today, there are many software packages that make it much easier for engineers to perform fast and efficient kinematic analysis of machine assemblies. This paper presents the use of kinematic analysis software on the example of a slider-crank mechanism, an IC engine.

The subject of research of this article is the review of passenger transport by all types of traffic on the territory of Montenegro in the past few years. The number of passengers transported by rail was accompanied by a constant increase in transported passen gers from 2013 to 2016. After that, we have a drop in the number of passengers transported by rail in 2017. The number of passengers transported by road in Montenegro is constantly increasing from year to year. There has been a constant increase in the number of passengers transported at Montenegrin airports. As passenger transport is a very important activity of every country, in the last few years the state of Montenegro has been working on improving the transport infrastructure and the process of passenger transport.

The subject of this paper is the review and analysis of freight transport in Montenegro. Road freight transport has been growing steadily over the past few years. Rail, sea and air transport of the third are accompanied by numerous oscillations. The a rticle provides an overview of freight transport for EU countries as well. Freight transport in Montenegro differs from EU countries. In the last few years, work has been done on improving freight transport in Montenegro. These improvements are specifically related to infrastructure improvements, especially in road transport.

The subject of research in this paper is the analysis of road traffic safety in Montenegro. Road traffic safety in Montenegro is not at an enviable level. The number of traffic accidents on the territory of Montenegro has been constantly increasing in the la st few years. The state of traffic safety in Montenegro differs significantly from most EU countries. In the last few years, Montenegro has made great efforts to improve road safety. Infrastructure is being improved, technical inspections of road vehicles are being tightened, and a larg e number of campaigns have been done to improve road traffic safety