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  • Author: Štefánia Semanová x
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Influence of the Braking System that is Contrary to Legislation on Breaking Characteristics of Passenger Car

Abstract

There are also the vehicles among the other vehicles in road traffic that have been modified without being authorised by their producer. These also include modifications such as structural modifications in the vehicle break system. Besides a brake system of road motor vehicles is one of the main factors influencing the active safety of vehicles. The design of the brake system, its technical condition and additional intervention in its construction may have a positive as well as negative impact on the braking distance length and the value of the mean braking deceleration achieved. The paper focuses on the influence of the brake disc diameter of the front axle on the achieved value of the mean braking deceleration and the braking distance length, while the braking system has been modified for several times without being approved by car manufacturer. The introductory part of the paper describes the braking distance sections and it also explains the term of mean braking deceleration. The following part of the paper deals with the measurement methodology, measuring equipment and the vehicle used during the measurements as well as procedures employed. The results obtained from the measurements are processed and presented in tables and also in graphs for greater clarity. The final part of the paper summarizes and evaluates the measured results. The importance of the paper lies in quantification of the influence of brake discs with different diameters on the vehicle active safety in the case of a particular vehicle.

Open access
The Influence of Demographic Development and Population Structure on the Demand for Public Passenger Transport

Abstract

A prerequisite for realizing the demand for public passenger transport is the existence of its potential which represents the population of a city, region or state. The number of inhabitants has a direct impact on the demand for transport. The paper deals with examining the relationship and dependence between the population demographic development and the demand for public passenger transport. Not only in Slovakia but also in Europe and in the world, the main problem is the ageing population. The changing age structure of the population changes requirements, demands and habits of transported population groups. A gradual increase in the holders of cards of a person with severe disability or a person with severe disability with accompaniment can be observed in Slovakia in recent years. This group of the population has also a very strong impact on the demand for public passenger transport. The dependence between individual variables is examined in the conditions of the Ţilina self-governing region.

Open access
The Energy Efficiency of Electric Energy as a Traction Used in Transport

Abstract

The article deals with the problem of electric power production in terms of environmental impact, in particular the energy efficiency of its production to utilize primary sources. The efficiency of its production directly depends on the composition of primary sources and technologies used. Difference in efficiency by converting various forms of energy into electrical power and their ratio in the use directly affect the resulting efficiency, production of emissions and thus the environmental impact. Electric traction, its production, is burdened less efficient than other types of tractions used in transport, but at the final reconciliation of their consumption in vehicles, this difference decreases or delays because the vehicles themselves work with different conversion efficiency of its traction on mechanical work, vehicle driving.

Open access